Towards Understanding the Formation of Uniform Local Binary Patterns

Figure 7

Average intensity patch of the 12 most common intermediate root permutations in (8, 8) neighborhood (with interpolation) using test image 2 of Figure 5. The first rank from the left corresponds to the Eastern direction, and the following ranks are formed to the counterclockwise direction (North-East, North, etc.) It can be observed that the most common intermediate root permutations with this radius correspond to monotonically changing edge functions characterizing the horizontal gradients of the input image.