Thread replies: 7
Thread images: 1
Thread images: 1
File: Paint-Colors-568x388.jpg (60KB, 568x388px) Image search:
[Google]
60KB, 568x388px
sup /p/
is there an automatic way of matching histograms of a two versions of the same photo?
lets say i have one raw version of a photo and one jpg version with a proprietary effect applied (this can be a complex combination of curves, levels, saturation etc..). i want to apply the same effect to the raw version. I tried frequency separation and replacing the lower layer with the correct colors but since the jpg version is lower quality it induced some nasty artefacts to the edges. maybe if there was a way how to analyze the histograms and then do the color matching...
any ideas?
>>
>>3050913
The histogram alone doesn't contain enough information.
Different images can share the same histogram.
>>
>>3050952
sure but I'm not talking about (truly) different images. I'm talking about reverse engineering of a image if you have original raw file
>>
Assuming the pixels in the frame are of basically the same things under the same light, then you could probably use:
https://docs.gimp.org/en/plug-in-sample-colorize.html
>>
can you input any image to the back box? try to feed with a haldclut image, upscaled 2x to defeat any chroma downsampling. from there you can make a numerical LUT or use it as-is.
>>
>>3050913
why did you do the edits to a jpeg??
>>
>>3051358
Not OP, but say your catalog/xmp and backups get lost. You still have a jpeg of the final product as well as the raw file. You would like to recreate the jpeg you did originally with minimal time and effort. That could be one reason. I know because it happened to me when I first started but luckily I didn't have many photos and it didn't take long to get back to what I wanted.
Thread posts: 7
Thread images: 1
Thread images: 1