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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: IEEE Trans Med Imaging. 2016 Jan 18;35(6):1532–1543. doi: 10.1109/TMI.2016.2519264

Fig. 4.

Fig. 4

Left: one-block Haar-like feature. Right: two-block Haar-like feature. Red, green and blue rectangles denote the local patch, the positive block and the negative block, respectively.