I am trying to create an algorithm that detects and counts dead pixels from an intensity map in .csv format. My current approach is to divide the value of the pixel I am testing by the value of the pixel immediately to the right (or, if on the far right side, the one to the left). If the dividend is less than some threshold (currently .9), then I mark it as a dead pixel.
My question is, is there a better/more efficient way to calculate if a pixel is dead?
Sample csv output:
3183 3176 3207 3183 3212
3211 3197 3198 3183 3191
3193 3177 1135 3185 3176
3175 3184 3188 3179 3181
3181 3165 3184 3187 3183
In this example, the middle pixel would be a "dead" pixel.