After processing files through Raw Therapee and then noise through Neat Image, I went to open some of the photos in GIMP to make a collage. When some of the photos open in GIMP it appears that there is some type of Salty Grainy Noise that is not in the file when you open it in Image Viewer or Web Browser. It is also not in the file when the Gimp file is exported and open in Image viewer. Has anyone experienced this? Image on the left is GIMP and Image on the right is Image viewer. The file is the same file. It happens in two different versions of gimp. 2.10.18 Flatpack and 2.10.28.
I have never seen that before. Is the grain still visible if you view the image in 100% zoom? I think you should open a bug report.
Can you share the image so we can see if the same issue is present on our machines?
Here is a link to the orig jpg after run through neat image.
I looked at it in GIMP and in web browser at 100% and it appears to be the same.
When I processed it through neat image, I used a generated noise profile I made from another photo. I then auto applied sharpening which takes place after the noise process is done. At 100 percent it does seem like the salt is there. Let me know what you guys think.
I did go back and process the original jpg through neat image and allowed it to generate a profile for that image. The results seemed to be better. I think the extra sharpening at the end is the problem. I will do more testing.
if you zoom in the image to 100% in both GIMP and Eye of GNOME image viewer you’ll see that both images look the same. It looks salty because it is salty aka noisy.
Eye of GNOME is a terrible and inaccurate image viewer and I don’t get why it’s even being shipped by default anywhere.
If you wanna real viewer that will show your image accurately then you should use: Install HDRView on Ubuntu using the Snap Store | Snapcraft