An easy way to extract all values of pixel lab - please help!

Hello

For an image of any size and dimensions, I try to automatically extract the color for each pixel coordinate information, ideally the laboratory values. So the result would look something like this:

x          y          L          a          b

0          0          100     0          0

0          1          99       0          0

etc. Ideally, the output would be in the CSV format.

I've seen some pretty exceptional scripts that are similar to what I need (but not quite) and I'm also a perfect starting script so don't know where to start! Any help gratefully received!

Oh and I'm on PS3 extended.

See you soon

Steve

OK, this script assumes

There is an open document which is the Lab 8-bit mode

The script creates a CSV file in the same location as the open document (if she had not saved it will be saved on the desktop) with the same name as the opened document.

File.prototype.readByte = function() {
  return this.read(1).charCodeAt(0);
};
function convertByteToSignedByte(num){
     var dec = (num | (num % 256))-128
     return dec;
};
function convertByteToLum( num){
     var dec = Math.round((num/256)*100);
     return dec;
};
function main(){
if(!documents.length) return;
if(activeDocument.mode != DocumentMode.LAB) {
    alert("Please convert this document to Lab mode\r Then re-run this script");
    return;
    }
var Name = decodeURI(app.activeDocument.name).replace(/\.[^\.]+$/, '');
try{
var Path = activeDocument.path;
}catch(e){var Path = '~/Desktop';}
var rawFile = new File(Path +"/"+Name +".raw");
saveAsRaw(rawFile);
var csvFile = new File(Path +"/"+Name +".csv");
var len = 0;
var W = activeDocument.width.as('px');
CountW=0;
CountH=0;
rawFile.encoding = 'BINARY';
rawFile.open('r');
csvFile.open('w');
csvFile.writeln('X,Y,L,a,b');
while(!rawFile.eof){
    csvFile.write(CountW+',');
    csvFile.write(CountH+',');
     csvFile.write(convertByteToLum(rawFile.readByte())+',');
     csvFile.write(convertByteToSignedByte(rawFile.readByte())+',');
     csvFile.writeln(convertByteToSignedByte(rawFile.readByte()));
     len++;
     if(len % W == 0){
         CountH++;
         CountW=0;
         }else{
     CountW++;
     }
}
rawFile.close();
csvFile.close();
rawFile.remove();
}
main();
function saveAsRaw(file) {
var desc1 = new ActionDescriptor();
var desc2 = new ActionDescriptor();
desc2.putString( charIDToTypeID('FlCr'), "8BIM" );
desc2.putBoolean( charIDToTypeID('ChnI'), true );
desc1.putObject( charIDToTypeID('As  '), charIDToTypeID('Rw  '), desc2 );
desc1.putPath( charIDToTypeID('In  '), new File( file ) );
desc1.putBoolean( charIDToTypeID('Cpy '), true );
executeAction( charIDToTypeID('save'), desc1, DialogModes.NO );
};

Tags: Photoshop

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