August 2017
Beginner to intermediate
310 pages
10h 17m
English
In many practical cases, a set of nine 5 × 5 convolution masks are used to compute the texture energy. To obtain these nine masks, the vectors L5, E5, S5, and R5 are used. L5 gives a center-weighted local average, E5 detects edges, S5 detects spots, and R5 detects ripples. The 2-D convolution masks are obtained by computing the outer product of each pair of vectors. For example, the mask E5T and L5 as follows:
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