Relink to new image file by pixel-by-pixel comparison

Can you provide a download link to dropbox or similar (not uploaded to the forum, just in case that changes things), with the same QR code in both formats (say 3 pairs of images to check for consistency in data, zip compressed into one file)? There may be are other ways to check for similarity than just pixel content.

On your later post with filename prefix, is the prefix always the same per folder or batch?

Hi kajzica ,

the comparison part pixel-by-pixel could be done by PhotoShop.
With InDesign I see no way. Accessing PhotoShop from InDesign can be done by BridgeTalk.

Here an example with a snippet that opens an image placed with InDesign in PhotoShop:

( function()
{   
    if( app.documents.length == 0 ){ return };
    if( app.documents[0].allGraphics.length == 0 ){ return };
   
    // Have one placed and linked image in the active document:
    var image = app.documents[0].allGraphics[0];
   
    // Get the file path of the image:
    var imagePath = image.itemLink.filePath;
   
    // Test if the image is available:
    if( !File( imagePath ).exists ){ alert( "Error! Image does not exist!"); return };
   
    // We need the BridgeTalk object to talk to PhotoShop:
    var bt = new BridgeTalk;   
    bt.target = "photoshop";
   
    // A more compact way to write the script code for PhotoShop with triple fencing.
    // PhotoShop will open the image:
   
    var psdScript =
   
    '''
    app.displayDialogs = DialogModes.NO;
    var myPsDoc = app.open(File("''' + imagePath + '''"));
   
    // insert code for comparing this image with another one already open or with an image you open after this.
   
    app.displayDialogs = DialogModes.ALL;
   
    ''';
   
    bt.body = psdScript;
    //Idea: Kasyan Servetsky
    bt.onError = function(errObj)
    {
        alert( "Error: " + errObj.body );
    };
    //Idea: Kasyan Servetsky
    bt.onResult = function(resObj) {};
   
    bt.send( 30 );
   
}() )

How could a comparison of pixels be done with PhotoShop?

1. Load both images as layer to one PhotoShop file.

2. Do layer effect Difference on the top layer.

3. Merge the two layers to the background layer.

4. Exploit the Histogram feature.

You should see only one value that is not zero as first entry in the histogram array.

In effect the background layer is totally black with RGB 0,0,0. With a CMYK image the perfect result would be black with 100 C, 100 M, 100 Y, 100 K.

If not there is a difference in the two original images.

For details regarding PhotoShop scripting see:

Adobe Photoshop Scripting

Photoshop Scripting

EDIT:

And of course Davide Barranca's "Professional PhotoShop Scripting"

https://www.ps-scripting.com/

Regards,
Uwe