: Match the brightness on X layers at once in Photoshop I have a collection of 142 partially overlapping images, taken on a grid with a microscope. I've had to go through some pain to patch
I have a collection of 142 partially overlapping images, taken on a grid with a microscope. I've had to go through some pain to patch them all together as the automated software packages seemed to have a lot of trouble doing so, but in the end it worked out. However, now I am stuck with the issue that each image was taken at slightly different lighting conditions (due to how the microscope is setup), which gives me a sort of patchwork of different brightness squares. It is illustrated by the (partial) image below:
As you can see, the squares have slightly different lighting. Now, of course I can manually adjust each single layer until it has the same brightness as its neighbour, this is clear. But doing this 142 times is.. time consuming at best. I feel as if there should definitely be a way to automate this, but I haven't been able to find one.
So that is my question; is there a way to automatically match the lighting on multiple layers at once? I suppose I have to pick one as a reference, that is fine.
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Do you want to remove the tint and leave only the wiring? Or there are other things that need to be visible?
This is what I get as a result when I used Level layers.
Of course you can play with it more with more caution to save the data you see and want to leave visible.
Easy way to use levels. This is how histogram looks like before any changes.
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Then, point to black (wires) and white part of pictures (I've chosen the right down corner of rectangle). It create new histogram and then you can play with the settings.
If there are things that need to be preserved just copy them to another layer and move it above level layer.
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