However due to that our purpose is to find human
skin from different races, the thresholds given above
works only with a Caucasian people skin because the
first threshold only finds people with white skin, and
the second threshold segments people of different
places of the world but some pixels are detected as
skin but really not. For this reason is proposed a new
skin threshold to segment people within the image regardless skin color, so after exhaustive image
histogram analysis, the optimal range threshold was:
80≤Cb≤120 and 133≤Cr≤173