Hi. It seems like a very nice functionnality, but I have the same problem, nothing significant happens on the picture when I activate your tool. A slight flash, an indication that a curve was added, and nothing else. I typed autolevels in a shell, and I got this :
[-h] [–blackpoint BLACKPOINT [BLACKPOINT …]] [–whitepoint WHITEPOINT [WHITEPOINT …]]
[–blackclip BLACKCLIP [BLACKCLIP …]] [–whiteclip WHITECLIP [WHITECLIP …]]
[–max-blackshift MAX_BLACKSHIFT [MAX_BLACKSHIFT …]] [–max-whiteshift MAX_WHITESHIFT [MAX_WHITESHIFT …]]
[–maxblack MAXBLACK [MAXBLACK …]] [–minwhite MINWHITE [MINWHITE …]]
[–mode {smooth,smoother,hist,perceptive}] [–gamma GAMMA [GAMMA …]] [–model MODEL [MODEL …]]
[–saturation SATURATION] [–saturation-first] [–saturation-before-gamma] [–folder FOLDER] [–prefix PREFIX]
[–suffix SUFFIX] [–fstring FSTRING] [–outdir OUTDIR] [–outsuffix OUTSUFFIX] [–outprefix OUTPREFIX]
[–outfstring OUTFSTRING] [–simulate] [–reproduce REPRODUCE] [–icc-profile ICC_PROFILE] [–reset-icc]
[–version]
[files …]
No files specified
What am I supposed to see or check ? (I’m on windows, if it can make a difference for this kind of thing).