GRAB: generalized region assigned to binary

EURASIP Journal on Image and Video Processing

Table 6 Impact of selection of scales on GRAB performance on the FERET240 dataset

Image width	GRAB-best	GRAB-379	GRAB-3579
130	99.17	99.17	99.17
52	98.83	98.83	98.83
39	98.83	98.83	98.83
26	96.67	95.83	95.42
13	83.33	77.9	77.5

Results for GRAB-best are obtained using the ground-truth information, where we know the difference in scales between probe and gallery images and choose the appropriate scale operator. GRAB-3-7-9 is when we predefine the scale of GRAB operator to be 3, 7, and 9 and GRAB-3-5-7-9 is when we combine the scales 3, 5, 7, and 9.