Assigning Number to Color

Okay here's a script that you can try. There are some things you need to do. You need to enlarge the image using precent. I enlarged it 2400%, so that a one pixel square would be 24 px. In the script, you have to enter the hex values of the colors in the art work and the corosponding number that you want displayed. This script takes a long time to run, as it has to sample so many areas. So try it out on a small image first. Here is my test image:

#target photoshop
var doc = activeDocument;

var step = 24;

var hexVal, colorNum, pts

//Enter hex value of numbers and then the number to be displayed into the below array
var cArray = [['000000',1],
['FFFFFF',2],
['017185',3],
['0000FF',4],
['FF0000',5],
['3CFF00',6]];

for (var k=0;k<doc.height;k+=step){
    for( var j=0;j<doc.width;j+=step){
        pts = [j+step/2,k+step/2];
        hexV = getColor ();
        colorNum = findNum()
        makeText ();
        doc.activeLayer.rasterize (RasterizeType.TEXTCONTENTS)
        if(k>0||j>0)(doc.activeLayer.merge())
        }
    }

function makeText(){
    var artLayerRef = doc.artLayers.add()
    artLayerRef.kind = LayerKind.TEXT;
    var textItemRef = artLayerRef.textItem;
    textItemRef.contents =  colorNum
    textItemRef.size =  25
    textItemRef.position= pts
    var tCenter = pts[1]-(doc.activeLayer.bounds[1].value+(doc.activeLayer.bounds[3].value-doc.activeLayer.bounds[1].value)/2);

    
    doc.activeLayer.translate (0, tCenter)
    textItemRef.justification = Justification.CENTER;   
    }

function getColor(){
    doc.colorSamplers.removeAll();
    var cS = doc.colorSamplers.add(pts);
    var rgbC = new SolidColor
    var c1 = cS.color.rgb.hexValue
    return c1
    }

function findNum(){
    for (i=0;i<cArray.length;i++){
        if (hexV == cArray[i][0]){
            return cArray[i][1]; 
            }
        }
    return ' ';
    }