Use the ps script to get the exif of the image without opening it in photoshop

This scripts works for all kind of file formats also takes into consideration if the file was rotated in system:

(function(v){
     function sTT(v) {return stringIDToTypeID(v)}; function f(v1, v2) {
          if (arguments.length < 2) return r.getInteger(sTT(v1), 'px')
          return executeAction(sTT(v1 + 'ViewlessDocument'), v2)
     }
     (dsc1 = new ActionDescriptor()).putBoolean(sTT('preferXMPFromACR'), true)
     dsc1.putPath(sTT('file'), v), (r = f('open', dsc1)).getData(d = sTT('document'));
     (dsc2 = new ActionDescriptor()).putData(d, r.getData(d)), f('close', dsc2)
     return [f('width'), f('height')]
})(File('~/desktop/someFile.jpg'))

#target photoshop;
ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript"); 
var s = File.openDialog("Please select JPG file.","JPG File:*.jpg"); 
var file = new XMPFile(File(s).fsName, XMPConst.FILE_UNKNOWN, XMPConst.OPEN_FOR_READ);    
var xmp = file.getXMP();
if( xmp.doesPropertyExist(XMPConst.NS_EXIF, "PixelXDimension" ) ) {
    var x= xmp.getProperty(XMPConst.NS_EXIF, "PixelXDimension" );
    var y= xmp.getProperty(XMPConst.NS_EXIF, "PixelYDimension" );
    alert("X = " + x + " Y = " + y );
}else{
    alert("This files does not have EXIF dimensions");
    }