accessing the pixels' alpha values within a script (the "a" of rgba) when scanning a layer

Question

hi all,I need to evaluate/scan all pixels of a given PSD layer via a script. for accessing the R, G, B values I seached the script reference and found the RGBColor element as PropertiesProperty Value type What it isblue number [0..255] Read-write. The blue color value (default: 255).green number [0..255] Read-write. The green color value (default: 255)hexValue string Read-write. The hexadecimal representation of the color.red number [0..255] Read-write. The red color value (default: 255)typename string Read-only. The class name of the referenced RGBColor object.BUT I NEED to evaluate the alpha value of the layer's pixels. where is this value stored? is it mathematically imbedded in R, G and B?does anybody has a sample for accessing all pixels of a layer?thanks for any info and link to a sample script, or any note.beststephen

Paul Riggott · Answer

These are the values that are available for a selected pixel...

var mySampler = app.activeDocument.colorSamplers.add([new UnitValue( 100,'px'),new UnitValue(100,'px' )]);
var R = Math.round(mySampler.color.rgb.red); //Red Value
var G = Math.round(mySampler.color.rgb.green); //Green value
var B = Math.round(mySampler.color.rgb.blue); // Blue value
var hexColour = "#"+mySampler.color.rgb.hexValue;
var Hue = Math.round(mySampler.color.hsb.hue); //Hue value
var Saturation = Math.round(mySampler.color.hsb.saturation); //Saturation value
var Brightness = Math.round(mySampler.color.hsb.brightness); //Brightness value
var Opacity = activeDocument.activeLayer.opacity; //Layer opacity

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