Detecting/highlighting hot pixels (not removing them)
Are there any helpful functions which can highlight hot isolated single pixels without removing them by averaging/bluring ? I'm thinking something like representing each pixel by the diff between it and neighbours and applying a threashold but unsure as to where to start with opencv. Any pointers appreciated.
what's the purpose of it ? what are you trying to achieve ? what does "hot" mean here ?
I'm trying to detect pixels which are unusually sensitive hence will be significantly overexposed (or saturated) -compared to their immediate neighbours. These are usually eliminated by "denoising" but I actually want to measure them (across multiple images).