Script to get Exif data on text layer in PhotoSHop CS4

I did not try this on CS4, only on CC2017.

You can get other elements on the exif.

I had to choose a few.

trey this on an active image:

// get and organize the exif data:
var myExif_arr = activeDocument.info.exif; // or ... activeDocument.info.exif.toSource().split(',');
var thisImageExifPlusData = "[Exposure ";
var sizeCR2 = "";
var ISO = "";
var focalLength = "";
var whiteBalance = "";
var flash = "";
if (myExif_arr instanceof Array && myExif_arr.length > 0) {
    for (var e in myExif_arr) {
        // you can use this above to get all the data available on exif (use ESTK console)
        // $.writeln(myExif_arr.join('\t●'));
        if (myExif_arr[0] == "Exposure Program") {
            var exposureProgramResult = myExif_arr[1].toString().replace(/\s/g,'').toLowerCase();
            if (exposureProgramResult.match(/defined/) != null) { thisImageExifPlusData += "|pgr>?? "; }
            else if (exposureProgramResult.match(/manual/) != null) { thisImageExifPlusData += "|pgr>Man "; }
            else if (exposureProgramResult.match(/normal/) != null) { thisImageExifPlusData += "|pgr>Norm "; }
            else if (exposureProgramResult.match(/aperture/) != null) { thisImageExifPlusData += "|pgr>AP "; }
            else if (exposureProgramResult.match(/shutter/) != null) { thisImageExifPlusData += "|pgr>SP "; }
            else if (exposureProgramResult.match(/creative/) != null) { thisImageExifPlusData += "|pgr>Create "; }
            else if (exposureProgramResult.match(/action/) != null) { thisImageExifPlusData += "|pgr>Ac "; }
            else if (exposureProgramResult.match(/portrait/) != null) { thisImageExifPlusData += "|pgr>Portr "; }
            else if (exposureProgramResult.match(/landscape/) != null) { thisImageExifPlusData += "|pgr>Lands "; }
        }
        // ISO
        if (myExif_arr[0] == "ISO Speed Ratings") {
            ISO = "[ISO " + myExif_arr[1].toString() + "]";
        }
        // Exposure Metering
        if (myExif_arr[0] == "Metering Mode") {
            var meteringResult = myExif_arr[1].toString().toLowerCase();
            if (meteringResult.match(/unknown/) != null) { thisImageExifPlusData += "|meter>?? "; }
            else if (meteringResult.match(/average/) != null) { thisImageExifPlusData += "|meter>Average "; }
            else if (meteringResult.match(/center/) != null) { thisImageExifPlusData += "|meter>CenterWA "; }
            else if (meteringResult.match(/spot/) != null) { thisImageExifPlusData += "|meter>Spot "; }
            else if (meteringResult.match(/multispot/) != null) { thisImageExifPlusData += "|meter>MultiSpot "; }
            else if (meteringResult.match(/pattern/) != null) { thisImageExifPlusData += "|meter>Patern "; }
            else if (meteringResult.match(/partial/) != null) { thisImageExifPlusData += "|meter>Partial "; }
            else if (meteringResult.match(/portrait/) != null) { thisImageExifPlusData += "|meter>Port "; }
            else if (meteringResult.match(/other/) != null) { thisImageExifPlusData += "|meter>other "; }
        }
        // Exposure Bias Value == Exposure Compensation
        if (myExif_arr[0] == "Exposure Bias Value") {
            thisImageExifPlusData += "|compens>" + myExif_arr[1].toString() + " ";
        }
        //
        // Exposure Mode
        if (myExif_arr[0] == "Exposure Mode") {
            thisImageExifPlusData += "|mode>" + myExif_arr[1].toString() + " ";
        }
        // Focal Length
        if (myExif_arr[0] == "Focal Length") {
            focalLength = "[FocLeng>" + myExif_arr[1].toString().replace(/\s/g,'') + "]";
        }
        // Pixel X,Y Dimension (both width & height at the same time)
        if (myExif_arr[0] == "Pixel X Dimension") {
            sizeCR2 = "[" + myExif_arr[1].toString() + "x" + myExif_arr[Number(e)+1][1].toString() + "]";
        }
        // White Balance
        if (myExif_arr[0] == "White Balance") {
            whiteBalance = "[WB>" + myExif_arr[1].toString() + "]";
        }
        // Flash
        if (myExif_arr[0] == "Flash") {
            // this is another way of getting the data from flash (there other properties if on)
            if (activeDocument.xmpMetadata.rawData.match(/\<exif\:Fired\>(.+?)\<\/exif\:Fired\>/).length > 1) { //~ <exif:Fired>True</exif:Fired>
                var flashTF = activeDocument.xmpMetadata.rawData.match(/\<exif\:Fired\>(.+?)\<\/exif\:Fired\>/)[1].toString().toLowerCase() == "true";
                flash = (flashTF) ? "[FlashON]" : "[FlashOFF]";
            }
        }
    }   
}
var result = activeDocument.name.replace(/\_/g,'') + " " + ISO + " " + focalLength + " " + whiteBalance + "\r"; // ;
result += flash + " " + sizeCR2 + " "+ thisImageExifPlusData + "]"; //
//
var newLayer = makeTextLayer(result); 
//
function makeTextLayer(text) { 
    var startRulerUnits = app.preferences.rulerUnits;
    app.preferences.rulerUnits = Units.PIXELS;
    app.preferences.typeUnits = TypeUnits.POINTS;
    var FontName = "Trebuchet Ms";
    var FontSize = 11;
    var black = new SolidColor();
    black.rgb.hexValue = '000000';
    var newTextLayer = activeDocument.artLayers.add();
    newTextLayer.kind = LayerKind.TEXT;
    newTextLayer.textItem.kind = TextType.POINTTEXT;
    newTextLayer.textItem.color = black;
    newTextLayer.textItem.font = FontName;
    newTextLayer.textItem.size = FontSize;
    newTextLayer.textItem.contents = text.toString();
    var toX = 50;
    var toY = 80;
    newTextLayer.textItem.position = [new UnitValue(toX, 'px'), new UnitValue(toY, 'px')];
    app.preferences.rulerUnits = startRulerUnits;
} 

There are scripts that place metadata from the documnet into a text layer. I don't know of one that uses those exact fields. You could try modifying one of those or create your own.

If you want to create your own, the doc's metadata can be accessed with app.activeDocument.info , app.activeDocument.info.exif, and app.activeDocument.xmpMetadata.rawData