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I'm new in OpenCV and also in Image processing.

I have two images in grayscale. I want to balance their brightness (both images should have very similar brightness).

I think about equalizeHist, but the result doesn't depend on the second image. I also find information about histogram matching, but I don't find any working example in OpenCV.

Could you give me a hint and example how to do that?

Miroslav Novák
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  • If histogram matching is what you are looking for, have a look at [THIS](https://stackoverflow.com/questions/32655686/histogram-matching-of-two-images-in-python-2-x) and [THIS](https://dsp.stackexchange.com/questions/19980/histogram-matching-specification-in-python). Although the implementation is in python it would be of much help. – Jeru Luke May 01 '18 at 08:03
  • Thank you for your response! I don't look only for histogram matching. Just for some method for balancing brightness. – Miroslav Novák May 01 '18 at 08:35
  • It would help if you convert your images to LAB color space and then apply histogram matching on the `L` channel before converting the images to RGB – Jeru Luke May 01 '18 at 08:36

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