Figure 7
From: Explore semantic pixel sets based local patterns with information entropy for face recognition
The details of computing the semantic set map. This figure shows the detailed process for clustering the semantic pixel sets in one face block. First, the pixel intensity value distribution is computed. It can be viewed as a simplified sorting process. Then, it is quantified into k sets according to the learned number. Finally, according the raw pixel intensity values and the sets they belong to, a semantic set map for one face block can be obtained.