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. 2016 Jul 21;16(7):1134. doi: 10.3390/s16071134

Figure 4.

Figure 4

Demonstration of methodology for extracting the wHOG feature by combining the HOG features of images and weighted values of corresponding sub-blocks: (a) input image; (b) quality measurement map (MEAN map or STD map); and (c) the wHOG feature by combining (a) and (b).