Differences in stretch and saturation in exported TIFF when open in PS.

[pleautaud]

I have an issue with 16bit and 32bit TIFF files exported from GraXpert using the function “Save Streched & Processed”, when I open the file in Adobe Photoshop (v. 25.7.0 20240415.r.504 130b225 x64), the image appears different from the GraXpert window; it appears to have more contrast, brightness, and noise (see attached screenshot).

I tried adjusting the image mode and color profile in PS but in all cases the image appears different than the GraXpert preview. I have also tried opening the TIFF file in Siril (v. 1.2.1) with linear stretch and the issue persists.

Any ideas on what might be happening?

Screenshot:

[Steffenhir]

The stretched image you see in GraXpert always uses the Original or the gradient-corrected version for reference for the stretch parameters. I guess when you click on Save Stretch and Processed, the stretch parameters are calculated for the processed image itself. I have to fix that. Thanks for reporting!