I am working on an image processing project. Faster I process the images, the better. However as I increase the fps of my camera, everything begin to appear darker, since the camera do not have enough time to receive light. I was wondering if I could find a way around of this issue, since I know what is causing it.
I am thinking of writing a code that will increase all pixel values proportionally with what camera returns. Since only difference is the time duration, I think there should be a linear proportion between pixel values and the time duration camera had while taking that picture.
Before trying this, I have searched if there is anything available online but failed to find any. It feels like this is a basic concept so I would be surprised if no one had done such a thing before, so I might be using wrong keywords.
So my question is, is there a filter or an algorithm that increases the "illumination" of a dark image (since shot at high fps). If not, does what I intend to do make sense?
I think you should use Histogram Equalization here, rather than increasing all the pixels by some constant factor. Histogram Equalization makes the the probability of all possible pixel intensity equal thus enhancing the image.
Read about it using the following links
http://www.math.uci.edu/icamp/courses/math77c/demos/hist_eq.pdf https://en.wikipedia.org/wiki/Histogram_equalization
Read this article on how to do it in opencv, http://docs.opencv.org/2.4/doc/tutorials/imgproc/histograms/histogram_equalization/histogram_equalization.html