I'm not talking about photography in this question, I hope not to be in the wrong place but I think here someone can give me good ideas.
I'm working on some videos for computer vision tasks. The videos are taken with a video surveillance camera (I can't change the exposure). Sometimes I have problem problems of overexposure: some part of the image are super-bright.
Even if I'm handling the problem in the image-processing/digital side to correct it, I'm still curious if there are some analogical filter I can apply on to the lens to correct the overexposure.