How to Distinguish the "Bad pixel" from CMOS or CCD sensor?

Bad pixel includes both dead pixel and warm pixel.

Very easy understanding of dead pixel. And the dead pixel comprise hot pixel and dark pixel. The dark pixel that lasting dark, and hot pixel that lasting bright.

The warm pixel will be influenced by the environment, but its light or dark degree is relatively different, it is possible to be a bit brighter or a bit darker.

For example, the luminance is 200 on average around the warm pixel. That warm pixel is 220 or 180 probably.