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Histogram passed and drawn into a Layer. Done!

Enthusiast ,
Dec 14, 2017

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Hi, I have made an exercise that can be usefull to someone.

On a active image, it builds and draws the histograms on several layers.

This works only on RGB images and if they have more than 8bits/channel, it will reduce to 8bit/channel before proced.

I used this on windows 10 and CC(2017)

Enjoy or complete and develop it as you want.

This next code will build 4 layers

1 -  the 3 rgb channels coloured histogram

2 - the Max(, , ) Luminosity RGB histogram (gets the max value of each channel)

3 - the 8bit Lightness channel Lab histogram (the image will be reverted again to RGB afterwards)

4 - 8bit Luminosity RGB histogram

addHistogram(true); // this draws a layer with a coloured 8bit RGB histogram

addHistogram(false, false, true); //  this draws the Max(, , ) Luminosity RGB histogram (gets the max value of each channel)

addHistogram(false, true); // this draws a layer with 8bit Lightness channel Lab histogram

addHistogram(false, false); // this draws a layer with 8bit Luminosity RGB histogram

///////////////////////////////  HISTOGRAM IN LAYER   ///////////////////////////////////

function addHistogram(RGB, Lab, MaxRGB) {

    ///////////////////////////////////////////////// createProgressWindow

    var createProgressWindow = function(title, message, hasCancelButton) {

      var win;

      if (title == null) title = "Work in progress";

      if (message == null) message = "Please wait...";

      if (hasCancelButton == null) hasCancelButton = false;

      win = new Window("palette", "" + title, undefined);

      win.bar = win.add("progressbar", {x: 20, y: 12, width: 300, height: 20 }, 0, 100);

      win.stMessage = win.add("statictext", { x: 10, y: 36, width: 320, height: 20 }, "" + message);

      win.stMessage.justify = 'center'; 

      if (hasCancelButton) {

        win.cancelButton = win.add('button', undefined, 'Cancel');

        win.cancelButton.onClick = function() {

          win.close();

          throw new Error('User canceled the pre-processing!');

        };

      }

      this.reset = function(message) {

        win.bar.value = 0;

        win.stMessage.text = message;

        return win.update();

      };

      this.updateProgress = function(perc, message) {

        if (perc != null) win.bar.value = perc;

        if (message != null) win.stMessage.text = message;

        return win.update();

      };

      this.close = function() {

        return win.close();

      };

      win.center(win.parent);

      return win.show();

    };

    //

    // the other layer histograms, if exist, should be invisible so the reading is only on the pixels of the image itself

    if (getLayer("RGB histogram")) activeDocument.artLayers.getByName ("RGB histogram").visible = false;

    if (getLayer("Lightness Lab histogram")) activeDocument.artLayers.getByName ("Lightness Lab histogram").visible = false;

    if (getLayer("Luminosity RGB")) activeDocument.artLayers.getByName ("Luminosity RGB").visible = false;

    if (getLayer("Luminosity Max")) activeDocument.artLayers.getByName ("Luminosity Max").visible = false;

    //

    var layerName = (RGB) ? "RGB histogram" : ((Lab) ? "Lightness Lab histogram" : ((MaxRGB) ? "Luminosity Max" : "Luminosity RGB")); 

    //

    if (!getLayer(layerName)) {

        // it works only on RGB images

        if (activeDocument.mode == DocumentMode.RGB) {

            // if the image is 16bit/channel or more it sets 8bits/channel before read the histogram

            if (!activeDocument.bitsPerChannel == BitsPerChannelType.EIGHT) activeDocument.bitsPerChannel = BitsPerChannelType.EIGHT;

            $.writeln(layerName);

            var wasHereLayer = activeDocument.activeLayer;

            var unitsAntes = app.preferences.rulerUnits;

            var foregroundPreviousColor = app.foregroundColor;

            app.preferences.rulerUnits = Units.PIXELS; // importante

            activeDocument.quickMaskMode = false;

            activeDocument.selection.deselect();

            //

            // read histogram:

            var hL = activeDocument.histogram;

            var hR = activeDocument.channels["Red"].histogram;

            var hG = activeDocument.channels["Green"].histogram;

            var hB = activeDocument.channels["Blue"].histogram;

            // if you want the Luminosity of Lab, export it to Lab, read it, and revert it to RGB

            if (Lab) {

                activeDocument.changeMode (ChangeMode.LAB);

                // read Lightness channel histogram of Lab

                var hL = activeDocument.channels["Lightness"].histogram;

                // revert to RGB

                activeDocument.changeMode (ChangeMode.RGB);

            } else {

                // read Luminosity composite channel histogram of RGB

                var hL = activeDocument.histogram;

            }

            //

            var ww = activeDocument.width.as('px');

            var hh = activeDocument.height.as('px');

            var totalPixels = ww*hh;

            var totalPixels1Col = totalPixels/256;

            //

            var pBar = new createProgressWindow("Histogram building...", "Please wait", false);

            //

            activeDocument.artLayers.add();

            activeDocument.activeLayer.name = layerName;

            activeDocument.activeLayer.move( activeDocument, ElementPlacement.PLACEATBEGINNING );

            activeDocument.activeLayer.blendMode = BlendMode.NORMAL; // blending mode "normal"

            activeDocument.activeLayer.opacity = 60; // opacity 60%

            //

            var hhGraph = 60;

            var hY = 400; // base y of graph

            var hX = 100; // base x of graph

            // base transparent

            app.foregroundColor.rgb.red = 0;

            app.foregroundColor.rgb.green = 0;

            app.foregroundColor.rgb.blue = 0;

            //

            drawSelectionScreen (hX-2, hY+2, 258+hX, hY-322);

            // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]

            app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 40, false);

            activeDocument.selection.deselect();

            //

            var myHist = [];

            //

            if (RGB) {

                for (var a in activeDocument.componentChannels) {

                    //  criar as 3 cores R, G e B e o graph da cada uma

                    (a==0) ? app.foregroundColor.rgb.red = 255 : app.foregroundColor.rgb.red = 0;

                    (a==1) ? app.foregroundColor.rgb.green = 255 : app.foregroundColor.rgb.green = 0;

                    (a==2) ? app.foregroundColor.rgb.blue = 255 : app.foregroundColor.rgb.blue = 0;

                    //

                    if (a==0) myHist = hR;

                    if (a==1) myHist = hG;

                    if (a==2) myHist = hB;

                    //

                    for ( i = 0; i <= 255; i++ ) {

                        var col = i+hX;

                        var YYY = Math.min(Math.floor(myHist*hhGraph/totalPixels1Col), 320);

                        drawSelectionScreen (col, hY, col+1, hY-YYY);

                        //

                        var percent = Math.floor(((i+1)+(a*256))*100/768);

                        pBar.updateProgress (percent, activeDocument.componentChannels.name.toUpperCase() + " Channel " + percent+ " % completed");

                    }

                    // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]

                    app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 100, false);

                    activeDocument.selection.deselect();

                }

            } else {

                app.foregroundColor.rgb.red = 255;

                app.foregroundColor.rgb.green = 255;

                app.foregroundColor.rgb.blue = 255;

                myHist = hL;

                for ( i = 0; i <= 255; i++ ) {

                    var col = i+hX;

                    if (MaxRGB) {

                        var YYY = Math.min(Math.floor(Math.max(hR, hG, hB)*hhGraph/totalPixels1Col), 320);

                    } else {

                        var YYY = Math.min(Math.floor(myHist*hhGraph/totalPixels1Col), 320);

                    }

                    drawSelectionScreen (col, hY, col+1, hY-YYY);

                    //

                    var percent = Math.floor((i+1)*100/256);

                    pBar.updateProgress (percent, "Luminosity Channel " + percent+ " % completed");

                }

                // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]

                app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 100, false);

                activeDocument.selection.deselect();

            }

            pBar.close();

            // activeDocument.activeLayer = wasHereLayer;

            app.preferences.rulerUnits = unitsAntes;

            app.foregroundColor = foregroundPreviousColor;

            $.gc();

        } else {

            alert("Must be an RGB image");

        }

    } else {

        alert("Already has created this '" + layerName + "' layer!");

        return;

    }

    function drawSelectionScreen(x1, y1, x2, y2) {

        $.level = 0;

        try {

            // SelectionType.SELECTEDAREA | DIMINISH | EXTEND | INTERSECT | REPLACE

            activeDocument.selection.select([[ x1, y1], [x2, y1], [x2, y2], [x1,y2]], SelectionType.EXTEND, 0, false);

        } catch(e) {}

        $.level = 1;

    }

    function drawLineScreen(x1, y1, x2, y2, width, transparency) {

        $.level = 0;

        try {

            var desc = new ActionDescriptor();

            var lineDesc = new ActionDescriptor();

            var startDesc = new ActionDescriptor();

            startDesc.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), x1 );

            startDesc.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), y1 );

            lineDesc.putObject( charIDToTypeID('Strt'), charIDToTypeID('Pnt '), startDesc );

            var endDesc = new ActionDescriptor();

            endDesc.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), x2 );

            endDesc.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), y2 );

            lineDesc.putObject( charIDToTypeID('End '), charIDToTypeID('Pnt '), endDesc );

            lineDesc.putUnitDouble( charIDToTypeID('Wdth'), charIDToTypeID('#Pxl'), width ); //

            desc.putObject( charIDToTypeID('Shp '), charIDToTypeID('Ln  '), lineDesc );

            desc.putEnumerated( charIDToTypeID( "Md  " ), charIDToTypeID( "BlnM" ), charIDToTypeID( "Scrn" ) ); // mode: Screen

            desc.putUnitDouble( charIDToTypeID( "Opct" ), charIDToTypeID( "#Prc" ), transparency ); // [0-100] transparency

            desc.putBoolean( charIDToTypeID('AntA'), false ); // important antialias should be false

            executeAction( charIDToTypeID('Draw'), desc, DialogModes.NO );

        } catch(e) {}

        $.level = 1;

    }

    //////////////////////////////////

    function getLayer(layername) {

        var result = false;

        for (var a=0; a<activeDocument.artLayers.length ; a++) {

            if (String(activeDocument.artLayers.name) == layername) {

                result = true;

                break;

            }

        }

        return result;

    }

}

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Histogram passed and drawn into a Layer. Done!

Enthusiast ,
Dec 14, 2017

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Hi, I have made an exercise that can be usefull to someone.

On a active image, it builds and draws the histograms on several layers.

This works only on RGB images and if they have more than 8bits/channel, it will reduce to 8bit/channel before proced.

I used this on windows 10 and CC(2017)

Enjoy or complete and develop it as you want.

This next code will build 4 layers

1 -  the 3 rgb channels coloured histogram

2 - the Max(, , ) Luminosity RGB histogram (gets the max value of each channel)

3 - the 8bit Lightness channel Lab histogram (the image will be reverted again to RGB afterwards)

4 - 8bit Luminosity RGB histogram

addHistogram(true); // this draws a layer with a coloured 8bit RGB histogram

addHistogram(false, false, true); //  this draws the Max(, , ) Luminosity RGB histogram (gets the max value of each channel)

addHistogram(false, true); // this draws a layer with 8bit Lightness channel Lab histogram

addHistogram(false, false); // this draws a layer with 8bit Luminosity RGB histogram

///////////////////////////////  HISTOGRAM IN LAYER   ///////////////////////////////////

function addHistogram(RGB, Lab, MaxRGB) {

    ///////////////////////////////////////////////// createProgressWindow

    var createProgressWindow = function(title, message, hasCancelButton) {

      var win;

      if (title == null) title = "Work in progress";

      if (message == null) message = "Please wait...";

      if (hasCancelButton == null) hasCancelButton = false;

      win = new Window("palette", "" + title, undefined);

      win.bar = win.add("progressbar", {x: 20, y: 12, width: 300, height: 20 }, 0, 100);

      win.stMessage = win.add("statictext", { x: 10, y: 36, width: 320, height: 20 }, "" + message);

      win.stMessage.justify = 'center'; 

      if (hasCancelButton) {

        win.cancelButton = win.add('button', undefined, 'Cancel');

        win.cancelButton.onClick = function() {

          win.close();

          throw new Error('User canceled the pre-processing!');

        };

      }

      this.reset = function(message) {

        win.bar.value = 0;

        win.stMessage.text = message;

        return win.update();

      };

      this.updateProgress = function(perc, message) {

        if (perc != null) win.bar.value = perc;

        if (message != null) win.stMessage.text = message;

        return win.update();

      };

      this.close = function() {

        return win.close();

      };

      win.center(win.parent);

      return win.show();

    };

    //

    // the other layer histograms, if exist, should be invisible so the reading is only on the pixels of the image itself

    if (getLayer("RGB histogram")) activeDocument.artLayers.getByName ("RGB histogram").visible = false;

    if (getLayer("Lightness Lab histogram")) activeDocument.artLayers.getByName ("Lightness Lab histogram").visible = false;

    if (getLayer("Luminosity RGB")) activeDocument.artLayers.getByName ("Luminosity RGB").visible = false;

    if (getLayer("Luminosity Max")) activeDocument.artLayers.getByName ("Luminosity Max").visible = false;

    //

    var layerName = (RGB) ? "RGB histogram" : ((Lab) ? "Lightness Lab histogram" : ((MaxRGB) ? "Luminosity Max" : "Luminosity RGB")); 

    //

    if (!getLayer(layerName)) {

        // it works only on RGB images

        if (activeDocument.mode == DocumentMode.RGB) {

            // if the image is 16bit/channel or more it sets 8bits/channel before read the histogram

            if (!activeDocument.bitsPerChannel == BitsPerChannelType.EIGHT) activeDocument.bitsPerChannel = BitsPerChannelType.EIGHT;

            $.writeln(layerName);

            var wasHereLayer = activeDocument.activeLayer;

            var unitsAntes = app.preferences.rulerUnits;

            var foregroundPreviousColor = app.foregroundColor;

            app.preferences.rulerUnits = Units.PIXELS; // importante

            activeDocument.quickMaskMode = false;

            activeDocument.selection.deselect();

            //

            // read histogram:

            var hL = activeDocument.histogram;

            var hR = activeDocument.channels["Red"].histogram;

            var hG = activeDocument.channels["Green"].histogram;

            var hB = activeDocument.channels["Blue"].histogram;

            // if you want the Luminosity of Lab, export it to Lab, read it, and revert it to RGB

            if (Lab) {

                activeDocument.changeMode (ChangeMode.LAB);

                // read Lightness channel histogram of Lab

                var hL = activeDocument.channels["Lightness"].histogram;

                // revert to RGB

                activeDocument.changeMode (ChangeMode.RGB);

            } else {

                // read Luminosity composite channel histogram of RGB

                var hL = activeDocument.histogram;

            }

            //

            var ww = activeDocument.width.as('px');

            var hh = activeDocument.height.as('px');

            var totalPixels = ww*hh;

            var totalPixels1Col = totalPixels/256;

            //

            var pBar = new createProgressWindow("Histogram building...", "Please wait", false);

            //

            activeDocument.artLayers.add();

            activeDocument.activeLayer.name = layerName;

            activeDocument.activeLayer.move( activeDocument, ElementPlacement.PLACEATBEGINNING );

            activeDocument.activeLayer.blendMode = BlendMode.NORMAL; // blending mode "normal"

            activeDocument.activeLayer.opacity = 60; // opacity 60%

            //

            var hhGraph = 60;

            var hY = 400; // base y of graph

            var hX = 100; // base x of graph

            // base transparent

            app.foregroundColor.rgb.red = 0;

            app.foregroundColor.rgb.green = 0;

            app.foregroundColor.rgb.blue = 0;

            //

            drawSelectionScreen (hX-2, hY+2, 258+hX, hY-322);

            // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]

            app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 40, false);

            activeDocument.selection.deselect();

            //

            var myHist = [];

            //

            if (RGB) {

                for (var a in activeDocument.componentChannels) {

                    //  criar as 3 cores R, G e B e o graph da cada uma

                    (a==0) ? app.foregroundColor.rgb.red = 255 : app.foregroundColor.rgb.red = 0;

                    (a==1) ? app.foregroundColor.rgb.green = 255 : app.foregroundColor.rgb.green = 0;

                    (a==2) ? app.foregroundColor.rgb.blue = 255 : app.foregroundColor.rgb.blue = 0;

                    //

                    if (a==0) myHist = hR;

                    if (a==1) myHist = hG;

                    if (a==2) myHist = hB;

                    //

                    for ( i = 0; i <= 255; i++ ) {

                        var col = i+hX;

                        var YYY = Math.min(Math.floor(myHist*hhGraph/totalPixels1Col), 320);

                        drawSelectionScreen (col, hY, col+1, hY-YYY);

                        //

                        var percent = Math.floor(((i+1)+(a*256))*100/768);

                        pBar.updateProgress (percent, activeDocument.componentChannels.name.toUpperCase() + " Channel " + percent+ " % completed");

                    }

                    // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]

                    app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 100, false);

                    activeDocument.selection.deselect();

                }

            } else {

                app.foregroundColor.rgb.red = 255;

                app.foregroundColor.rgb.green = 255;

                app.foregroundColor.rgb.blue = 255;

                myHist = hL;

                for ( i = 0; i <= 255; i++ ) {

                    var col = i+hX;

                    if (MaxRGB) {

                        var YYY = Math.min(Math.floor(Math.max(hR, hG, hB)*hhGraph/totalPixels1Col), 320);

                    } else {

                        var YYY = Math.min(Math.floor(myHist*hhGraph/totalPixels1Col), 320);

                    }

                    drawSelectionScreen (col, hY, col+1, hY-YYY);

                    //

                    var percent = Math.floor((i+1)*100/256);

                    pBar.updateProgress (percent, "Luminosity Channel " + percent+ " % completed");

                }

                // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]

                app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 100, false);

                activeDocument.selection.deselect();

            }

            pBar.close();

            // activeDocument.activeLayer = wasHereLayer;

            app.preferences.rulerUnits = unitsAntes;

            app.foregroundColor = foregroundPreviousColor;

            $.gc();

        } else {

            alert("Must be an RGB image");

        }

    } else {

        alert("Already has created this '" + layerName + "' layer!");

        return;

    }

    function drawSelectionScreen(x1, y1, x2, y2) {

        $.level = 0;

        try {

            // SelectionType.SELECTEDAREA | DIMINISH | EXTEND | INTERSECT | REPLACE

            activeDocument.selection.select([[ x1, y1], [x2, y1], [x2, y2], [x1,y2]], SelectionType.EXTEND, 0, false);

        } catch(e) {}

        $.level = 1;

    }

    function drawLineScreen(x1, y1, x2, y2, width, transparency) {

        $.level = 0;

        try {

            var desc = new ActionDescriptor();

            var lineDesc = new ActionDescriptor();

            var startDesc = new ActionDescriptor();

            startDesc.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), x1 );

            startDesc.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), y1 );

            lineDesc.putObject( charIDToTypeID('Strt'), charIDToTypeID('Pnt '), startDesc );

            var endDesc = new ActionDescriptor();

            endDesc.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), x2 );

            endDesc.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), y2 );

            lineDesc.putObject( charIDToTypeID('End '), charIDToTypeID('Pnt '), endDesc );

            lineDesc.putUnitDouble( charIDToTypeID('Wdth'), charIDToTypeID('#Pxl'), width ); //

            desc.putObject( charIDToTypeID('Shp '), charIDToTypeID('Ln  '), lineDesc );

            desc.putEnumerated( charIDToTypeID( "Md  " ), charIDToTypeID( "BlnM" ), charIDToTypeID( "Scrn" ) ); // mode: Screen

            desc.putUnitDouble( charIDToTypeID( "Opct" ), charIDToTypeID( "#Prc" ), transparency ); // [0-100] transparency

            desc.putBoolean( charIDToTypeID('AntA'), false ); // important antialias should be false

            executeAction( charIDToTypeID('Draw'), desc, DialogModes.NO );

        } catch(e) {}

        $.level = 1;

    }

    //////////////////////////////////

    function getLayer(layername) {

        var result = false;

        for (var a=0; a<activeDocument.artLayers.length ; a++) {

            if (String(activeDocument.artLayers.name) == layername) {

                result = true;

                break;

            }

        }

        return result;

    }

}

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Dec 14, 2017 3
Adobe Community Professional ,
Dec 14, 2017

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It worked perfectly on CS6 EXTENDED!

That new createProgressWindow() is something new for me I like visible incement. It works very fast (as far as panels are hidden, but that's normal). The end result makes only last layer is visible. Shouldn't all be checked? Anyway that is ok too

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Dec 14, 2017 0
Enthusiast ,
Dec 14, 2017

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Hi,

I the function I created, I put all the existing histograms invisible so the next histogram when being created, it should not be affected by the colors added to the image  from the previous histograms.

Resume: the histograms should be build on the image colors and not the layer colors of the histograms.

In the end, the last histogram created should be visible and the previous invisible.

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Dec 14, 2017 0
Community Beginner ,
Mar 22, 2018

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Is it possible to do this for video footage?

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Mar 22, 2018 0
Enthusiast ,
Mar 22, 2018

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I don't know if I understand the question.

You mean video within photoshop where you can get the histogram at any frame?

That should work in a single stoped frame.

In the meantime I have found that it is much faster to draw the histogram in a layer creating first all the vector data by code and on the layer 1 time in the end for each channel.

When I have time I can update the code.

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Mar 22, 2018 1
Community Beginner ,
Mar 26, 2018

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Is it possible to do this in After Effects for Video footage

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Mar 26, 2018 0
Enthusiast ,
Mar 26, 2018

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I only have very few scripts tested in AE and the histogram is not one of them.

If it is possible, I do not know.

May be the histogram data could be passed to an external JSON file and converted outside to a svg using uts RGB colors objects to mix has 'screen' colors mode (possible in SVG css)

Then I do not know AE enough to know if you can import a svg image into a frame by code...

Sorry, I can't help more.

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Mar 26, 2018 0
Community Beginner ,
Apr 16, 2018

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Script works, but for those who want histogram for not transparent pixels, modify this script to make selection first (selection without transparent pixels by: Selection->Load->from transparency).

Or use HSB/HSL filter from Win_Optional_Plug-Ins.zip which surely works on selections - above didnt ( it may require more modifications).

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Apr 16, 2018 0
Community Beginner ,
Feb 27, 2019

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Thank you very much for sharing this... I was looking for something similar.

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Feb 27, 2019 1
Explorer ,
Sep 16, 2020

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Hey Pedro! Thank you for this wonderful script. Unfortunately it does not work for me on PS 2020 and i can't find out why. Stays just silent.

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Sep 16, 2020 0
Adobe Community Professional ,
Sep 16, 2020

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When transferring text from the old forum to the new one, some symbols were removed, in particular [i] and [a].
I fixed it. Try this script.
addHistogram(true); // this draws a layer with a coloured 8bit RGB histogram 

//addHistogram(false, false, true); //  this draws the Max(, , ) Luminosity RGB histogram (gets the max value of each channel)

//addHistogram(false, true); // this draws a layer with 8bit Lightness channel Lab histogram 

//addHistogram(false, false); // this draws a layer with 8bit Luminosity RGB histogram 

///////////////////////////////  HISTOGRAM IN LAYER   ///////////////////////////////////

function addHistogram(RGB, Lab, MaxRGB) {

    ///////////////////////////////////////////////// createProgressWindow

    var createProgressWindow = function(title, message, hasCancelButton) {

      var win;

      if (title == null) title = "Work in progress";

      if (message == null) message = "Please wait...";

      if (hasCancelButton == null) hasCancelButton = false;

      win = new Window("palette", "" + title, undefined);

      win.bar = win.add("progressbar", {x: 20, y: 12, width: 300, height: 20 }, 0, 100);

      win.stMessage = win.add("statictext", { x: 10, y: 36, width: 320, height: 20 }, "" + message);

      win.stMessage.justify = 'center';  

      if (hasCancelButton) {

        win.cancelButton = win.add('button', undefined, 'Cancel');

        win.cancelButton.onClick = function() {

          win.close();

          throw new Error('User canceled the pre-processing!');

        };

      }

      this.reset = function(message) {

        win.bar.value = 0;

        win.stMessage.text = message;

        return win.update();

      };

      this.updateProgress = function(perc, message) {

        if (perc != null) win.bar.value = perc;

        if (message != null) win.stMessage.text = message;

        return win.update();

      };

      this.close = function() {

        return win.close();

      };

      win.center(win.parent);

      return win.show();

    };

    //

    // the other layer histograms, if exist, should be invisible so the reading is only on the pixels of the image itself

    if (getLayer("RGB histogram")) activeDocument.artLayers.getByName ("RGB histogram").visible = false;

    if (getLayer("Lightness Lab histogram")) activeDocument.artLayers.getByName ("Lightness Lab histogram").visible = false;

    if (getLayer("Luminosity RGB")) activeDocument.artLayers.getByName ("Luminosity RGB").visible = false;

    if (getLayer("Luminosity Max")) activeDocument.artLayers.getByName ("Luminosity Max").visible = false;

    //

    var layerName = (RGB) ? "RGB histogram" : ((Lab) ? "Lightness Lab histogram" : ((MaxRGB) ? "Luminosity Max" : "Luminosity RGB"));  

    //

    if (!getLayer(layerName)) {

        // it works only on RGB images

        if (activeDocument.mode == DocumentMode.RGB) {

            // if the image is 16bit/channel or more it sets 8bits/channel before read the histogram

            if (!activeDocument.bitsPerChannel == BitsPerChannelType.EIGHT) activeDocument.bitsPerChannel = BitsPerChannelType.EIGHT;

            var wasHereLayer = activeDocument.activeLayer;

            var unitsAntes = app.preferences.rulerUnits;

            var foregroundPreviousColor = app.foregroundColor;

            app.preferences.rulerUnits = Units.PIXELS; // importante

            activeDocument.quickMaskMode = false;

            activeDocument.selection.deselect();

            //

            // read histogram:

            var hL = activeDocument.histogram;

            var hR = activeDocument.channels["Red"].histogram;

            var hG = activeDocument.channels["Green"].histogram;

            var hB = activeDocument.channels["Blue"].histogram;

            // if you want the Luminosity of Lab, export it to Lab, read it, and revert it to RGB

            if (Lab) {

                activeDocument.changeMode (ChangeMode.LAB);

                // read Lightness channel histogram of Lab 

                var hL = activeDocument.channels["Lightness"].histogram;

                // revert to RGB

                activeDocument.changeMode (ChangeMode.RGB);

            } else {

                // read Luminosity composite channel histogram of RGB 

                var hL = activeDocument.histogram;

            }

            //

            var ww = activeDocument.width.as('px');

            var hh = activeDocument.height.as('px');

            var totalPixels = ww*hh;

            var totalPixels1Col = totalPixels/256;

            // 

            var pBar = new createProgressWindow("Histogram building...", "Please wait", false);

            // 

            activeDocument.artLayers.add();

            activeDocument.activeLayer.name = layerName;

            activeDocument.activeLayer.move( activeDocument, ElementPlacement.PLACEATBEGINNING );

            activeDocument.activeLayer.blendMode = BlendMode.NORMAL; // blending mode "normal"

            activeDocument.activeLayer.opacity = 60; // opacity 60%

            //

            var hhGraph = 60;

            var hY = 400; // base y of graph

            var hX = 100; // base x of graph

            // base transparent

            app.foregroundColor.rgb.red = 0;

            app.foregroundColor.rgb.green = 0;

            app.foregroundColor.rgb.blue = 0;

            //

            drawSelectionScreen (hX-2, hY+2, 258+hX, hY-322);

            // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100] 

            app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 40, false);

            activeDocument.selection.deselect();

            //

            var myHist = [];

            //

            if (RGB) {

                for (var a in activeDocument.componentChannels) {

                    //  criar as 3 cores R, G e B e o graph da cada uma

                    (a==0) ? app.foregroundColor.rgb.red = 255 : app.foregroundColor.rgb.red = 0;

                    (a==1) ? app.foregroundColor.rgb.green = 255 : app.foregroundColor.rgb.green = 0;

                    (a==2) ? app.foregroundColor.rgb.blue = 255 : app.foregroundColor.rgb.blue = 0;

                    // 

                    if (a==0) myHist = hR;

                    if (a==1) myHist = hG;

                    if (a==2) myHist = hB;

                    //

                    for ( i = 0; i <= 255; i++ ) {

                        var col = i+hX;

                        var YYY = Math.min(Math.floor(myHist[i]*hhGraph/totalPixels1Col), 320);

                        drawSelectionScreen (col, hY, col+1, hY-YYY);

                        //

                        var percent = Math.floor(((i+1)+(a*256))*100/768);

                        pBar.updateProgress (percent, activeDocument.componentChannels[a].name.toUpperCase() + " Channel " + percent+ " % completed");

                    }

                    // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100] 

                    app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 100, false);

                    activeDocument.selection.deselect();

                }

            } else {

                app.foregroundColor.rgb.red = 255;

                app.foregroundColor.rgb.green = 255;

                app.foregroundColor.rgb.blue = 255;

                myHist = hL;

                for ( i = 0; i <= 255; i++ ) {

                    var col = i+hX;

                    if (MaxRGB) {

                        var YYY = Math.min(Math.floor(Math.max(hR[i], hG[i], hB[i])*hhGraph/totalPixels1Col), 320);

                    } else {

                        var YYY = Math.min(Math.floor(myHist[i]*hhGraph/totalPixels1Col), 320);

                    }

                    drawSelectionScreen (col, hY, col+1, hY-YYY);

                    //

                    var percent = Math.floor((i+1)*100/256);

                    pBar.updateProgress (percent, "Luminosity Channel " + percent+ " % completed");

                }

                // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100] 

                app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 100, false);

                activeDocument.selection.deselect();

            }

            pBar.close();

            // activeDocument.activeLayer = wasHereLayer;

            app.preferences.rulerUnits = unitsAntes;

            app.foregroundColor = foregroundPreviousColor;

        } else {

            alert("Must be an RGB image");

        }

    } else {

        alert("Already has created this '" + layerName + "' layer!");

        return;

    }

    function drawSelectionScreen(x1, y1, x2, y2) {

        try {

            // SelectionType.SELECTEDAREA | DIMINISH | EXTEND | INTERSECT | REPLACE

            activeDocument.selection.select([[ x1, y1], [x2, y1], [x2, y2], [x1,y2]], SelectionType.EXTEND, 0, false);

        } catch(e) {}

    }

    function drawLineScreen(x1, y1, x2, y2, width, transparency) {

        try {

            var desc = new ActionDescriptor();

            var lineDesc = new ActionDescriptor();

            var startDesc = new ActionDescriptor();

            startDesc.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), x1 );

            startDesc.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), y1 );

            lineDesc.putObject( charIDToTypeID('Strt'), charIDToTypeID('Pnt '), startDesc );

            var endDesc = new ActionDescriptor();

            endDesc.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), x2 );

            endDesc.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), y2 );

            lineDesc.putObject( charIDToTypeID('End '), charIDToTypeID('Pnt '), endDesc );

            lineDesc.putUnitDouble( charIDToTypeID('Wdth'), charIDToTypeID('#Pxl'), width ); // 

            desc.putObject( charIDToTypeID('Shp '), charIDToTypeID('Ln  '), lineDesc );

            desc.putEnumerated( charIDToTypeID( "Md  " ), charIDToTypeID( "BlnM" ), charIDToTypeID( "Scrn" ) ); // mode: Screen 

            desc.putUnitDouble( charIDToTypeID( "Opct" ), charIDToTypeID( "#Prc" ), transparency ); // [0-100] transparency

            desc.putBoolean( charIDToTypeID('AntA'), false ); // important antialias should be false

            executeAction( charIDToTypeID('Draw'), desc, DialogModes.NO );

        } catch(e) {}

    }

    //////////////////////////////////

    function getLayer(layername) {

        var result = false;

        for (var a=0; a<activeDocument.artLayers.length ; a++) {

            if (String(activeDocument.artLayers[a].name) == layername) {

                result = true;

                break;

            }

        }

        return result;

    }

}

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Sep 16, 2020 1
Explorer ,
Sep 16, 2020

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Hi R-Bin! Thanks for the quick reply. Unfortunately still doesn't work for me. Gives me the spinning cursor for a second or two but that´s it. No histogram layer. Trying this from a pixel layer (copy of the background layer)

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Sep 16, 2020 0
Adobe Community Professional ,
Sep 16, 2020

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It works for me on 21.2.2 (win7)
Check that you have correctly copied the text.
 

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Sep 16, 2020 0
Advocate ,
Sep 16, 2020

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It also works on 21.2.3 (Win10)

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Sep 16, 2020 0
Explorer ,
Sep 16, 2020

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Double checked but does not work. Will update from 21.2.0 to 21.2.3. and see what will happen. Thanks again!

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Sep 16, 2020 0
Explorer ,
Oct 09, 2020

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I recently debugged this script with estk and the probem is that the channel names are in english but i use the german version of PS. Of course i can translate that and it works fine then. But is there any way to make this work in all languages? 

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Oct 09, 2020 0
Adobe Community Professional ,
Oct 09, 2020

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Use numbers, so 0 or 1 or 2 instead of another RGB or LAB 'colors'.

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Oct 09, 2020 1
Advocate ,
Oct 09, 2020

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Das hier sollte sprachunabhängig funktionieren:

#target photoshop

addHistogram(true); // this draws a layer with a coloured 8bit RGB histogram   
    addHistogram(false, false, true); //  this draws the Max([R], [G], [B]) Luminosity RGB histogram (gets the max value of each channel)  
    addHistogram(false, true); // this draws a layer with 8bit Lightness channel Lab histogram   
    addHistogram(false, false); // this draws a layer with 8bit Luminosity RGB histogram   
      
      
    ///////////////////////////////  HISTOGRAM IN LAYER   ///////////////////////////////////  
    function addHistogram(RGB, Lab, MaxRGB) {  
        ///////////////////////////////////////////////// createProgressWindow  
        var createProgressWindow = function(title, message, hasCancelButton) {  
          var win;  
          if (title == null) title = "Work in progress";  
          if (message == null) message = "Please wait...";  
          if (hasCancelButton == null) hasCancelButton = false;  
          win = new Window("palette", "" + title, undefined);  
          win.bar = win.add("progressbar", {x: 20, y: 12, width: 300, height: 20 }, 0, 100);  
          win.stMessage = win.add("statictext", { x: 10, y: 36, width: 320, height: 20 }, "" + message);  
          win.stMessage.justify = 'center';    
          if (hasCancelButton) {  
            win.cancelButton = win.add('button', undefined, 'Cancel');  
            win.cancelButton.onClick = function() {  
              win.close();  
              throw new Error('User canceled the pre-processing!');  
            };  
          }  
          this.reset = function(message) {  
            win.bar.value = 0;  
            win.stMessage.text = message;  
            return win.update();  
          };  
          this.updateProgress = function(perc, message) {  
            if (perc != null) win.bar.value = perc;  
            if (message != null) win.stMessage.text = message;  
            return win.update();  
          };  
          this.close = function() {  
            return win.close();  
          };  
          win.center(win.parent);  
          return win.show();  
        };  
        //  
        // the other layer histograms, if exist, should be invisible so the reading is only on the pixels of the image itself  
        if (getLayer("RGB histogram")) activeDocument.artLayers.getByName ("RGB histogram").visible = false;  
        if (getLayer("Lightness Lab histogram")) activeDocument.artLayers.getByName ("Lightness Lab histogram").visible = false;  
        if (getLayer("Luminosity RGB")) activeDocument.artLayers.getByName ("Luminosity RGB").visible = false;  
        if (getLayer("Luminosity Max[R][G][B]")) activeDocument.artLayers.getByName ("Luminosity Max[R][G][B]").visible = false;  
        //  
        var layerName = (RGB) ? "RGB histogram" : ((Lab) ? "Lightness Lab histogram" : ((MaxRGB) ? "Luminosity Max[R][G][B]" : "Luminosity RGB"));    
        //  
        if (!getLayer(layerName)) {  
            // it works only on RGB images  
            if (activeDocument.mode == DocumentMode.RGB) {  
                // if the image is 16bit/channel or more it sets 8bits/channel before read the histogram  
                if (!activeDocument.bitsPerChannel == BitsPerChannelType.EIGHT) activeDocument.bitsPerChannel = BitsPerChannelType.EIGHT;  
                $.writeln(layerName);  
                var wasHereLayer = activeDocument.activeLayer;  
                var unitsAntes = app.preferences.rulerUnits;  
                var foregroundPreviousColor = app.foregroundColor;  
                app.preferences.rulerUnits = Units.PIXELS; // importante  
                activeDocument.quickMaskMode = false;  
                activeDocument.selection.deselect();  
                //  
                // read histogram:  
                var hL = activeDocument.histogram;  
                var hR = activeDocument.channels[0].histogram;  
                var hG = activeDocument.channels[1].histogram;  
                var hB = activeDocument.channels[2].histogram;  
                // if you want the Luminosity of Lab, export it to Lab, read it, and revert it to RGB  
                if (Lab) {  
                    activeDocument.changeMode (ChangeMode.LAB);  
                    // read Lightness channel histogram of Lab   
                    var hL = activeDocument.channels[0].histogram;  
                    // revert to RGB  
                    activeDocument.changeMode (ChangeMode.RGB);  
                } else {  
                    // read Luminosity composite channel histogram of RGB   
                    var hL = activeDocument.histogram;  
                }  
                //  
                var ww = activeDocument.width.as('px');  
                var hh = activeDocument.height.as('px');  
                var totalPixels = ww*hh;  
                var totalPixels1Col = totalPixels/256;  
                //   
                var pBar = new createProgressWindow("Histogram building...", "Please wait", false);  
                //   
                activeDocument.artLayers.add();  
                activeDocument.activeLayer.name = layerName;  
                activeDocument.activeLayer.move( activeDocument, ElementPlacement.PLACEATBEGINNING );  
                activeDocument.activeLayer.blendMode = BlendMode.NORMAL; // blending mode "normal"  
                activeDocument.activeLayer.opacity = 60; // opacity 60%  
                //  
                var hhGraph = 60;  
                var hY = 400; // base y of graph  
                var hX = 100; // base x of graph  
                // base transparent  
                app.foregroundColor.rgb.red = 0;  
                app.foregroundColor.rgb.green = 0;  
                app.foregroundColor.rgb.blue = 0;  
                //  
                drawSelectionScreen (hX-2, hY+2, 258+hX, hY-322);  
                // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]   
                app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 40, false);  
                activeDocument.selection.deselect();  
                //  
                var myHist = [];  
                //  
                if (RGB) {  
                    for (var a in activeDocument.componentChannels) {  
                        //  criar as 3 cores R, G e B e o graph da cada uma  
                        (a==0) ? app.foregroundColor.rgb.red = 255 : app.foregroundColor.rgb.red = 0;  
                        (a==1) ? app.foregroundColor.rgb.green = 255 : app.foregroundColor.rgb.green = 0;  
                        (a==2) ? app.foregroundColor.rgb.blue = 255 : app.foregroundColor.rgb.blue = 0;  
                        //   
                        if (a==0) myHist = hR;  
                        if (a==1) myHist = hG;  
                        if (a==2) myHist = hB;  
                        //  
                        for ( i = 0; i <= 255; i++ ) {  
                            var col = i+hX;  
                            var YYY = Math.min(Math.floor(myHist[i]*hhGraph/totalPixels1Col), 320);  
                            drawSelectionScreen (col, hY, col+1, hY-YYY);  
                            //  
                            var percent = Math.floor(((i+1)+(a*256))*100/768);  
                            pBar.updateProgress (percent, activeDocument.componentChannels[a].name.toUpperCase() + " Channel " + percent+ " % completed");  
                        }  
                        // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]   
                        app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 100, false);  
                        activeDocument.selection.deselect();  
                    }  
                } else {  
                    app.foregroundColor.rgb.red = 255;  
                    app.foregroundColor.rgb.green = 255;  
                    app.foregroundColor.rgb.blue = 255;  
                    myHist = hL;  
                    for ( i = 0; i <= 255; i++ ) {  
                        var col = i+hX;  
                        if (MaxRGB) {  
                            var YYY = Math.min(Math.floor(Math.max(hR[i], hG[i], hB[i])*hhGraph/totalPixels1Col), 320);  
                        } else {  
                            var YYY = Math.min(Math.floor(myHist[i]*hhGraph/totalPixels1Col), 320);  
                        }  
                        drawSelectionScreen (col, hY, col+1, hY-YYY);  
                        //  
                        var percent = Math.floor((i+1)*100/256);  
                        pBar.updateProgress (percent, "Luminosity Channel " + percent+ " % completed");  
                    }  
                    // fill (filltype [, mode] [, opacity] [, preserveTransparency])  // filltype: SolidColor  |  mode: ColorBlendMode  |  opacity: [1..100]   
                    app.activeDocument.selection.fill(app.foregroundColor, ColorBlendMode.SCREEN, 100, false);  
                    activeDocument.selection.deselect();  
                }  
                pBar.close();  
                // activeDocument.activeLayer = wasHereLayer;  
                app.preferences.rulerUnits = unitsAntes;  
                app.foregroundColor = foregroundPreviousColor;  
                $.gc();  
            } else {  
                alert("Must be an RGB image");  
            }  
        } else {  
            alert("Already has created this '" + layerName + "' layer!");  
            return;  
        }  
        function drawSelectionScreen(x1, y1, x2, y2) {  
            $.level = 0;  
            try {  
                // SelectionType.SELECTEDAREA | DIMINISH | EXTEND | INTERSECT | REPLACE  
                activeDocument.selection.select([[ x1, y1], [x2, y1], [x2, y2], [x1,y2]], SelectionType.EXTEND, 0, false);  
            } catch(e) {}  
            $.level = 1;  
        }  
        function drawLineScreen(x1, y1, x2, y2, width, transparency) {  
            $.level = 0;  
            try {  
                var desc = new ActionDescriptor();  
                var lineDesc = new ActionDescriptor();  
                var startDesc = new ActionDescriptor();  
                startDesc.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), x1 );  
                startDesc.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), y1 );  
                lineDesc.putObject( charIDToTypeID('Strt'), charIDToTypeID('Pnt '), startDesc );  
                var endDesc = new ActionDescriptor();  
                endDesc.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), x2 );  
                endDesc.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), y2 );  
                lineDesc.putObject( charIDToTypeID('End '), charIDToTypeID('Pnt '), endDesc );  
                lineDesc.putUnitDouble( charIDToTypeID('Wdth'), charIDToTypeID('#Pxl'), width ); //   
                desc.putObject( charIDToTypeID('Shp '), charIDToTypeID('Ln  '), lineDesc );  
                desc.putEnumerated( charIDToTypeID( "Md  " ), charIDToTypeID( "BlnM" ), charIDToTypeID( "Scrn" ) ); // mode: Screen   
                desc.putUnitDouble( charIDToTypeID( "Opct" ), charIDToTypeID( "#Prc" ), transparency ); // [0-100] transparency  
                desc.putBoolean( charIDToTypeID('AntA'), false ); // important antialias should be false  
                executeAction( charIDToTypeID('Draw'), desc, DialogModes.NO );  
            } catch(e) {}  
            $.level = 1;  
        }  
        //////////////////////////////////  
        function getLayer(layername) {  
            var result = false;  
            for (var a=0; a<activeDocument.artLayers.length ; a++) {  
                if (String(activeDocument.artLayers[a].name) == layername) {  
                    result = true;  
                    break;  
                }  
            }  
            return result;  
        }  
    }  

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Oct 09, 2020 1
Explorer ,
Oct 11, 2020

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Perfekt! Vielen Dank Tom! 🙂

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Oct 11, 2020 0
Adobe Community Professional ,
Oct 11, 2020

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Oct 11, 2020 1