Detecting/highlighting hot pixels (not removing them)

asked 2018-06-01 03:46:31 -0500

ac123 gravatar image

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.

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what's the purpose of it ? what are you trying to achieve ? what does "hot" mean here ?

berak gravatar imageberak ( 2018-06-01 03:52:20 -0500 )edit

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).

ac123 gravatar imageac123 ( 2018-06-01 06:33:52 -0500 )edit