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Is there a way to resize the height of multiple images at once without setting a specific width?

Forum|Forum|7 years ago
May 8, 2018
5 replies
7865 views

I have multiple images with different dimensions. Is there a way to resize the height of multiple images at once without setting a specific width? I tried using the default action in photoshop (default > actions > commands > image size) but it requires I resize all images to have the same width.

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Correct answer Kukurykus

I wrote it in CS6 EXTENDED, but now tried in 19.1.3 version and it works too however you are right as I mistaken height with width. Now I corrected order, so layers won't be based on width, but height length. Additionally I added 'locked' layers case. So each time script meets them, they will be bypassed. Processing selected layers only version I will do a little later. Change:

resize(s = 600 / ((b = bounds)[2] - b[0]) * 100, s)

to

if (!positionLocked) resize(s = 600 / ((b = bounds)[3] - b[1]) * 100, s)

Here is mainly Action Manager ver. that does the same like previous one with correction (but still with no selected layers):

function sTT(v) {return stringIDToTypeID(v)}
function adl(v) {
     (ref = new ActionReference()).putEnumerated
     (sTT(v), sTT('ordinal'), sTT('targetEnum'))
}
adl('application'); if (typeIDToStringID(executeActionGet(ref)
.getEnumerationValue(sTT('rulerUnits'))) != 'rulerPixels')
     preferences.rulerUnits = Units.PIXELS
adl('document'), len = executeActionGet(ref).getInteger(sTT('numberOfLayers'))
for(i = 1; i <= len;) {
     (ref = new ActionReference()).putIndex(sTT('layer'), i++)
     if (typeIDToStringID((dsc = executeActionGet(ref))
     .getEnumerationValue(sTT(lS = 'layerSection'))) == lS + 'Content') {
          (lst = new ActionList()).putReference(ref), dsc.putList(sTT('null'), lst)
          function prtct(v) {
               return dsc.getObjectValue(sTT('layerLocking')).getBoolean(sTT(v))
          }
          if (!prtct('protectPosition') && !prtct('protectAll')) {
               bnds = dsc.getObjectValue(sTT('bounds'))
               if (!dsc.getBoolean(sTT('visible'))) {
                    executeAction(sTT('show'), dsc, DialogModes.NO)
               }
               (ref = new ActionReference()).putIndex(sTT('layer'), i - 1);
               (dsc = new ActionDescriptor()).putReference(sTT('null'), ref)
               executeAction(sTT('select'), dsc, DialogModes.NO)
               function h(v) {return bnds.getUnitDoubleValue(sTT(v))}
               if ((s = 600 / (h('top') - h('bottom')) * 100) < Infinity) {
                    function wh(v) {
                         dsc.putUnitDouble(sTT(v), sTT('percentUnit'), s)
                    }
                    wh('width'), wh('height'), executeAction
                    (sTT('transform'), dsc, DialogModes.NO)
               }
          }
     }
}

In previous script I prevented also transforming while processing empty layer. Here's a version where you can select layers:

function adl(v1, v2) {
     eval("(ref = new ActionReference()).put" + (!v2 ? "Enumerated" : "Index")
     + "(sTT(v1), " + (!v2 ? "sTT('ordinal'), sTT('targetEnum')" : I) + ")")
}
function prtct(v) {
     return dsc.getObjectValue(sTT('layerLocking')).getBoolean(sTT(v))
}
function prcs(v) {
     adl('layer', v); if (typeIDToStringID((dsc = executeActionGet(ref))
     .getEnumerationValue(sTT(lS = 'layerSection'))) == lS + 'Content') {
          (lst2 = new ActionList()).putReference(ref), dsc.putList(sTT('null'), lst2)
          if (!prtct('protectPosition') && !prtct('protectAll')) {
               bnds = dsc.getObjectValue(sTT('bounds'))
               if (!dsc.getBoolean(sTT('visible'))) {
                    executeAction(sTT('show'), dsc, DialogModes.NO)
               }
               if (v) (ref = new ActionReference()).putIndex(sTT('layer'), I);
               (dsc = new ActionDescriptor()).putReference(sTT('null'), ref)
               executeAction(sTT('select'), dsc, DialogModes.NO)
               function h(v) {return bnds.getUnitDoubleValue(sTT(v))}
               if ((s = 600 / (h('top') - h('bottom')) * 100) < Infinity) {
                    function wh(v) {
                         dsc.putUnitDouble(sTT(v), sTT('percentUnit'), s)
                    }
                    wh('width'), wh('height'), executeAction
                    (sTT('transform'), dsc, DialogModes.NO)
               }
          }
     }
}
function sTT(v) {return stringIDToTypeID(v)} $.level = 0
adl('application'); if (typeIDToStringID(executeActionGet(ref)
.getEnumerationValue(sTT('rulerUnits'))) != 'rulerPixels')
     preferences.rulerUnits = Units.PIXELS
try{
     (ref = new ActionReference()).putIdentifier(sTT('layer'), 1)
     bG = !(executeActionGet(ref)).getBoolean(sTT('background'))
}
catch (err) {bG = 1}
adl('document'), tL = sTT('targetLayers')
if ((dsc = executeActionGet(ref)).hasKey(tL)) {
     for(lst1 = dsc.getList(tL), i = 0; i < lst1.count; i++) {
          I = lst1.getReference(i).getIndex() + bG, prcs(true)
     }
}
else prcs()

Marja de Klerk

Inspiring

You can easily make your own action to set the height to 600px while retaining the original dimensions of the photo's:

In Actions Create a New Action and press the 'record' button.
Go to Image > Image Size and set the height to 600 pixels. The width will automatically adjust to the original dimensions if width and height are linked with 'constrain aspect ratio'. This is the default setting. Click OK.
In Actions stop recording.

Now you can play the action in the other photo's. Done!

Stephen Marsh

Community Expert

Thanks Marja, however the request is to proportionally resize multiple layers at different source heights to the same target pixel height, with the caveat being that they already exist in a document (not as separate files), preferably resizing with a “single command”.

Kukurykus

Legend

Copy it to notepad. Save as "Steady Height with Proportional Width.jsx" (incl. double quotes) into 'Presets / Scripts' of your Photoshop folder. Then (re)launch Ps and you will find this script in 'File / Scripts' menu. You may bind some shortcut to it, so any time you want to use this script you will just press some key(s) (in some cases you didn't specified it may not work):

preferences.rulerUnits = Units.PIXELS
function sTT(v) {return stringIDToTypeID(v)}
(ref = new ActionReference()).putEnumerated
(sTT('document'), sTT('ordinal'), sTT('targetEnum'))
len = executeActionGet(ref).getInteger(sTT('numberOfLayers'))
for(i = 1; i <= len;) {
     (ref = new ActionReference()).putIndex(sTT('layer'), i++)
     if (typeIDToStringID((dsc = executeActionGet(ref))
     .getEnumerationValue(sTT(lS = 'layerSection'))) == lS + 'Content') {
          (lst = new ActionList()).putReference(ref), dsc.putList(sTT('null'), lst)
          if (!dsc.getBoolean(sTT('visible'))) {
               executeAction(sTT('show'), dsc, DialogModes.NO)
          }
          (ref = new ActionReference()).putIndex(sTT('layer'), i - 1);
          (dsc = new ActionDescriptor()).putReference(sTT('null'), ref)
          executeAction(sTT('select'), dsc, DialogModes.NO)
          with(activeDocument.activeLayer) {
               resize(s = 600 / ((b = bounds)[2] - b[0]) * 100, s)
          }
     }
}

Stephen Marsh

Community Expert

Kukurykus I just tried your script in CC2018 with 3 layers selected, only 1 of the 3 layers is being resized to 600px high. Unless I have misunderstood the OP, all selected layers need to be the same height at 600 pixels, maintaining their original aspect ratio/proportional width. Each selected layer needs to be resized independently.

KukurykusCorrect answer

Legend

I wrote it in CS6 EXTENDED, but now tried in 19.1.3 version and it works too however you are right as I mistaken height with width. Now I corrected order, so layers won't be based on width, but height length. Additionally I added 'locked' layers case. So each time script meets them, they will be bypassed. Processing selected layers only version I will do a little later. Change:

resize(s = 600 / ((b = bounds)[2] - b[0]) * 100, s)

to

if (!positionLocked) resize(s = 600 / ((b = bounds)[3] - b[1]) * 100, s)

Here is mainly Action Manager ver. that does the same like previous one with correction (but still with no selected layers):

function sTT(v) {return stringIDToTypeID(v)}
function adl(v) {
     (ref = new ActionReference()).putEnumerated
     (sTT(v), sTT('ordinal'), sTT('targetEnum'))
}
adl('application'); if (typeIDToStringID(executeActionGet(ref)
.getEnumerationValue(sTT('rulerUnits'))) != 'rulerPixels')
     preferences.rulerUnits = Units.PIXELS
adl('document'), len = executeActionGet(ref).getInteger(sTT('numberOfLayers'))
for(i = 1; i <= len;) {
     (ref = new ActionReference()).putIndex(sTT('layer'), i++)
     if (typeIDToStringID((dsc = executeActionGet(ref))
     .getEnumerationValue(sTT(lS = 'layerSection'))) == lS + 'Content') {
          (lst = new ActionList()).putReference(ref), dsc.putList(sTT('null'), lst)
          function prtct(v) {
               return dsc.getObjectValue(sTT('layerLocking')).getBoolean(sTT(v))
          }
          if (!prtct('protectPosition') && !prtct('protectAll')) {
               bnds = dsc.getObjectValue(sTT('bounds'))
               if (!dsc.getBoolean(sTT('visible'))) {
                    executeAction(sTT('show'), dsc, DialogModes.NO)
               }
               (ref = new ActionReference()).putIndex(sTT('layer'), i - 1);
               (dsc = new ActionDescriptor()).putReference(sTT('null'), ref)
               executeAction(sTT('select'), dsc, DialogModes.NO)
               function h(v) {return bnds.getUnitDoubleValue(sTT(v))}
               if ((s = 600 / (h('top') - h('bottom')) * 100) < Infinity) {
                    function wh(v) {
                         dsc.putUnitDouble(sTT(v), sTT('percentUnit'), s)
                    }
                    wh('width'), wh('height'), executeAction
                    (sTT('transform'), dsc, DialogModes.NO)
               }
          }
     }
}

In previous script I prevented also transforming while processing empty layer. Here's a version where you can select layers:

function adl(v1, v2) {
     eval("(ref = new ActionReference()).put" + (!v2 ? "Enumerated" : "Index")
     + "(sTT(v1), " + (!v2 ? "sTT('ordinal'), sTT('targetEnum')" : I) + ")")
}
function prtct(v) {
     return dsc.getObjectValue(sTT('layerLocking')).getBoolean(sTT(v))
}
function prcs(v) {
     adl('layer', v); if (typeIDToStringID((dsc = executeActionGet(ref))
     .getEnumerationValue(sTT(lS = 'layerSection'))) == lS + 'Content') {
          (lst2 = new ActionList()).putReference(ref), dsc.putList(sTT('null'), lst2)
          if (!prtct('protectPosition') && !prtct('protectAll')) {
               bnds = dsc.getObjectValue(sTT('bounds'))
               if (!dsc.getBoolean(sTT('visible'))) {
                    executeAction(sTT('show'), dsc, DialogModes.NO)
               }
               if (v) (ref = new ActionReference()).putIndex(sTT('layer'), I);
               (dsc = new ActionDescriptor()).putReference(sTT('null'), ref)
               executeAction(sTT('select'), dsc, DialogModes.NO)
               function h(v) {return bnds.getUnitDoubleValue(sTT(v))}
               if ((s = 600 / (h('top') - h('bottom')) * 100) < Infinity) {
                    function wh(v) {
                         dsc.putUnitDouble(sTT(v), sTT('percentUnit'), s)
                    }
                    wh('width'), wh('height'), executeAction
                    (sTT('transform'), dsc, DialogModes.NO)
               }
          }
     }
}
function sTT(v) {return stringIDToTypeID(v)} $.level = 0
adl('application'); if (typeIDToStringID(executeActionGet(ref)
.getEnumerationValue(sTT('rulerUnits'))) != 'rulerPixels')
     preferences.rulerUnits = Units.PIXELS
try{
     (ref = new ActionReference()).putIdentifier(sTT('layer'), 1)
     bG = !(executeActionGet(ref)).getBoolean(sTT('background'))
}
catch (err) {bG = 1}
adl('document'), tL = sTT('targetLayers')
if ((dsc = executeActionGet(ref)).hasKey(tL)) {
     for(lst1 = dsc.getList(tL), i = 0; i < lst1.count; i++) {
          I = lst1.getReference(i).getIndex() + bG, prcs(true)
     }
}
else prcs()

PECourtejoie

Community Expert

Hello, have you tried to give a huge number for the width?

c.pfaffenbichler

Community Expert

File > Automate > Fit Image might also be useful.

Sahil.Chawla

Adobe Employee

Hi Jaylal,

Could you please try going to File > Scripts > Image processor and try that option and let us know how it goes?

Check out this article for steps: How to Batch Resize in Photoshop: A Step-by-Step Guide (2021)

Regards,

Sahil

JayLAL89Author

Participant

Hey! Thanks for the reply. Unfortunately, I was asked me to define a width as well.

Also, I think I should clarify what I am trying to do. I want to resize all images to have the same height while retaining each individual image dimensions (the PSD file is a collage and the width of the images I want to resize do not matter). Is there a function that will allow me to resize all 4 images at once to give them a height of 600px while retaining their original dimensions (so the width would automatically resize based on the height of the image)? Is it possible to do this in the original PSD file (without needing to alter the images in an outside folder)?

For example, my desired height is 600 px:

image 1 is 400 px x 200 px > resized to 1200 px x 600 px
image 2 is 525 px x 300 px > resized to 1050 px x 600 px
image 3 is 600 px x 375 px > resized to 960 px x 600 px
image 4 is 1000 px x 500 px > resized to 1200 px x 600 px

End Result (all images have a height of 600 px):

PECourtejoie

Community Expert

This script will resize to 600px height on a single active/targeted layer.

Further code would be needed to loop through selected layers or all layers… but further error checks for locked or invisible layers may also be needed. A complex conditional action could be used to run this script, however scripting would be more elegant.

// https://forums.adobe.com/thread/988084
// Line 13 = Change Current Layer Height to 600px
#target photoshop  
function main(){  
if(!documents.length) return;  
var startRulerUnits = app.preferences.rulerUnits;  
app.preferences.rulerUnits = Units.PIXELS;  
var doc = activeDocument;  
var res= doc.resolution;  
var LB = activeDocument.activeLayer.bounds;  
var Height= LB[3].value - LB[1].value;  
var onePix = 100/Height;  
var newSize = onePix * 600;  
doc.activeLayer.resize( newSize , newSize, AnchorPosition.MIDDLECENTER);   
app.preferences.rulerUnits = startRulerUnits;  
}  
main();

Stephen, excellent, you post made me ponder, we need building blocks of code, like a library, with the recursivity, hidden layer check, etc. Even better would be suite-wide automation similar to Automator/workflow that non coders could use, to perform those tasks...

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