I need a profile of density in a line across part of an image, for example, crossing a text character. How bright is it to the left of the letter I, in I, and to the right of I?
It's a pain having to use the eyedropper to capture the value of one pixel at a time, successively left to right, writing them down, and then plotting them manually.
Is there a way to capture the values in a long narrow selection and have CS6 display them, value vs position?
Note that this not a histogram, which will only tell me how many of each value exists overall in such a selection.
Thanks,
Nick
1 Correct answer
Sorry, but this is how Google translated.
Since you asked a question in the Photoshop scripting forum, I thought that you know how to create and run scripts.
Just in case a new script.
You select a zone as in the picture.
Run the script. Get the result as shown in the other picture.
...app.preferences.rulerUnits = Units.PIXELS;
var points = new Array();
try { var b = activeDocument.selection.bounds; } catch(e) { alert("No selection"); throw(e); }
var x0 = Number(b[0].value);
var y0 = Number(b[
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Replies
Sorry, but this is how Google translated.
Since you asked a question in the Photoshop scripting forum, I thought that you know how to create and run scripts.
Just in case a new script.
You select a zone as in the picture.
Run the script. Get the result as shown in the other picture.
app.preferences.rulerUnits = Units.PIXELS;
var points = new Array();
try { var b = activeDocument.selection.bounds; } catch(e) { alert("No selection"); throw(e); }
var x0 = Number(b[0].value);
var y0 = Number(b[1].value);
var x1 = Number(b[2].value);
activeDocument.selection.select([ [b[0],b[1]], [b[0]+1,b[1]], [b[0]+1,b[1]+1], [b[0],b[1]+1] ]);
var d = new ActionDescriptor();
var r = new ActionReference();
r.putProperty(stringIDToTypeID("channel"), stringIDToTypeID("selection"));
d.putReference( charIDToTypeID( "null" ), r );
var d2 = new ActionDescriptor();
d2.putUnitDouble( charIDToTypeID( "Hrzn" ), charIDToTypeID( "#Pxl" ), 1 );
d2.putUnitDouble( charIDToTypeID( "Vrtc" ), charIDToTypeID( "#Pxl" ), 0 );
d.putObject( charIDToTypeID( "T " ), charIDToTypeID( "Ofst" ), d2 );
var rez = 72/activeDocument.resolution;
var _p = new PathPointInfo();
with (_p)
{
kind = PointKind.CORNERPOINT;
anchor = leftDirection = rightDirection = [x0*rez, y0*rez];
}
points.push(_p);
for (var i = x0; i < x1; i++)
{
var h = activeDocument.histogram;
for (var n = 0; n < 256; n++)
{
if (h
) {
var p0 = new PathPointInfo();
var p1 = new PathPointInfo();
with (p0)
{
kind = PointKind.CORNERPOINT;
anchor = leftDirection = rightDirection = [i*rez, (y0-n)*rez];
}
with (p1)
{
kind = PointKind.CORNERPOINT;
anchor = leftDirection = rightDirection = [(i+1)*rez, (y0-n)*rez];
}
points.push(p0);
points.push(p1);
break;
}
}
executeAction( charIDToTypeID( "move" ), d, DialogModes.NO );
}
var _p = new PathPointInfo();
with (_p)
{
kind = PointKind.CORNERPOINT;
anchor = leftDirection = rightDirection = [x1*rez, y0*rez];
}
points.push(_p);
activeDocument.selection.deselect();
var pth = new Array();
pth[0] = new SubPathInfo();
pth[0].operation = ShapeOperation.SHAPEADD;
pth[0].closed = false;
pth[0].entireSubPath = points;
activeDocument.pathItems.add("Plot"+Math.random().toString().substr(2), pth);
P.S. I can not help you with anything else.
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