Color with a non-standard lens correction

Hey community!

I was invited to correct the colors of photos about 1,500 scientific for my wife's work. All these pictures are taken in the same lighting conditions. All are JPEG directly from the camera. Not VINTAGE. And each of them a color target - unfortunately, a non standard. This is a crop of an image of the sample:

fish-bad-target.jpg

If the target was a ColorChecker or similar, I would have done a profile using Adobe DNG Converter to make a custom profile. However, I don't know the values of the target company. Yet.

I have have access to the camera and the target as well. My question is, how you guys would get a reasonable color of these photos without too much effort?

Is there a way to correct the colors, specific values? As a profile so I know that the correct values in this graph - analog to the DNG workflow?

How would try to solve this task?

Your recommendations are welcome!

Sebastian

I had a similar problem, as seen in the two samples in the top row. (The difference in yellow is more immediately apparent). Try this:

After the shooting at the current target with Passport, creating the corrected version (Fig 1) (and convert to jpg to accompany the rest of your files), put the lower than corrected uncorrected version and hide the version corrected, as shown in the lower left image. The result may look like the image below on the right. I found as a black & white adjustment layer (set to luminosity) has established an acceptable match. Is not perfect. In my case, close enough even if only your level has been adjusted. You can choose a different adjustment related to the color balance, for example layer. This adjustment layer, you drag over each of your files should make the correction you want.

Something more: it may be necessary to use curves to match the gray scales before starting to process colors.

Tags: Photoshop

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