Possible broken color profile when exporting to png.
GIMP_2_10_30, OS GNU+Linux, Installed from repo
PNG images (always) have slight but numerous color differences, compared to original jpeg files, after export from GIMP. This affects only jpeg images not created in GIMP. Comparisons were made using GraphicsMagick. Both tools use libjpeg-turbo>=1.3.0_2. PNGs exported from GraphicsMagick are identical to original jpegs.
Steps to reproduce:
- Open any jpeg compressed image, not exported from GIMP.
- Export as png image.
- Run gm compare -metric mse input.jpg -quality 100 output.png or -file comparison.png to compare visually.