Incorrect behavior of the Compare feature in PhotoLab 8

[jmcsaky]

I experience some unexpected results when using the Compare button to compare an edited RAW file to its RGB output. If I select the single view mode, when I click on the Compare button the RGB image is not aligned with the RAW image – It is displaced slightly vertically and horizontally. If I select the split display modes, this is what I get:

The compare function works as expected if I compare a RAW file to a virtual copy.
Has anyone observed the same problem? Can anyone suggest how I might try to fix this situation?
I am on Windows 10 with an Intel Core i7-4790K CPU 4.00GHz, NVIDIA GeForce RTX 3060 , Memory (RAM): 32.0 GB.

[Egregius ([Greg] (Micro 4/3 + Win11))]

Someone else reported the same issue in the forum very recently. I can’t find that topic right now, but the problem might be related to the following old issue and might be specific to certain camera/lens combinations:

Using 'Compare' to see JPG vs RAW -- they're not aligned

I don’t remember this always being an issue, but when I select ‘Output>JPG’ as the comparison target, the JPG image does not replace the original as the same size. It doesn’t matter whether I’m zoomed into the original image or zoomed out to show the whole image, the JPG is not aligned to the original. Perhaps it’s just my setup, but that’s one of the things I’d like to find out. If it’s not just my setup, then is it really particularly difficult to write the software to find the display settin…

You should report a bug at support.dxo.com and provide sample images with their sidecar files (.dop, .xmp…). Files can be uploaded at upload.dxo.com once you’ve created a support request and received a ticket number.

[jmcsaky]

@Egregius

but the problem might be related to the following old issue and might be specific to certain camera/lens combinations:

Greg,
Thanks for your input and the link you provided. I am a long-time user of PhotoLab and upgraded recently from PhotoLab 6. I did not have any issues with the compare feature in the older versions.
Regards, Joseph

[George]

I could reproduce it when the 2 images have different sizes.

George

[George]

But both from the middle.

George

[George]

When a crop is involved you get this. Do a reset during comparing and see the difference. Undo the reset with CTRL-Z.

George

[jmcsaky]

@George

When a crop is involved you get this. Do a reset during comparing and see the difference. Undo the reset with CTRL-Z.

If I reset the crop on the RAW file and then compare it to the RGB file, the images are still out of alignment.

However, I have confirmed that the images are aligned if the geometry of the RAW file is not changed in editing.
Regards, Joseph