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I have made a mosaique of the sun, but all pictures have different light levels. I was wondering how to match these colors to be the same everywhere.

So basically I need all the pink to be the same shade, so that it will look like one picture. For example:

enter image description here

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you want them all to be absolutely identical, or you want to create a sphere with appropriate light source and shadows? –  Random O'Reilly Dec 23 '13 at 20:41
Ya know.. it may be easiest to just create a soft circle and add a few spot on it. I wouldn't have known that was the sun unless you posted it. –  Scott Dec 23 '13 at 21:03
That sort of beats the idea of astronomical observations :P –  Coolcrab Dec 23 '13 at 21:05
So you want a pink circle? There's no point spending hours editing all of those pictures together to achieve the same result you can get from a shape layer and a few effects. I could understand if there was some other parts to the picture but in essence it really is just a pink circle. –  Dominic Dec 23 '13 at 23:40
duplicate: photo.stackexchange.com/questions/46191/… –  horatio Jan 23 at 20:03
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1 Answer

There is a Photoshop tool called Photomerge, that not only places panorama pictures where they are 'supposed to go', but also does some color correction. It's in File > Automate > Photomerge, but I haven't used it, so I'm not sure if it will be enough (my guess is, it won't). You can use this tool to place the photos keeping their rectangular shape (required for this 'technique').

I don't know of any automatic good color correction tool, but there is a rather 'simple' (but long) trick that corrects the differences in brightness and color at the same time. You can use any software for this (Photoshop, Gimp, etc).

What you need to do is to measure the RGB pixel values on both sides of a layer boundary using the Color Picker tool, and then use the Curves tool to match the values in the neighbor layer.

It's important to remember that matching layer B to its neighbor A, means that subsequently layer C must be matched to B, and so on. It's better to start with a layer of average brightness and go from there.

The remaining color mismatches at layer edges can be corrected using layer masks. The idea is to blend the edges by using a gradient in a layer mask.

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