Attached is an image of an art print that has a color patch to left. Is it possible to do color correction with all of the color patches in Photoshop or another program? The problem is the color values of the original color patches are unknown. I am under the impression that a color checker software with a known calibrated target is required eg. Xrite. I figured the best I can do is set the white balance and white and dark levels. I have 100 of these files to adjust. I suspect the corrections may all be the same if they were photographed at the same time and lighting conditons.. I have a book that has high quality images of the same prints, so I can visually adjust each one by one. I plan to publish these photos in a book. The other idea I had is that I have access to a color corrected file of the same print different edition. I could write a program in Matlab to look at the color difference between the two prints and create a normalization file to match the colors of the two prints. The color corrected file version copyrighted so I can't use it directly. Getting the two files aligned and registered will take a lot of work and might required some machine learning algorithm to do it successfully. It might be best to do it my eye.