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Figure 3 | EURASIP Journal on Image and Video Processing

Figure 3

From: GRAB: generalized region assigned to binary

Figure 3

GRAB operator. Left: GRAB representation of a GRAB-5. Each 5 × 5 region computes the average in that region (average over rectangles shown on right). Note that each region is displaced to just overlap the center pixel. This is just one way of representing GRAB. If the center average is significantly different than average for neighbor k, then set bit k to 1, else set to 0. The blurring and displacement of the neighborhoods more accurately models the scale changes in an image. Right top: GRAB-3 representation showing two overlapping regions around the center region. Right bottom: Binary pattern obtained for center pixel c.

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