Local Dominant Directional Symmetrical Coding Patterns for Facial Expression Recognition

Table 3

Essential parameter settings for each descriptor.

Descriptor	Parameters	Value
LBP [17]	Block size	pixels
	Bit numbers	8
CS-LBP [18]	Block size	pixels
	Bit numbers	4
Gabor [19]	Direction numbers	8
	Scale numbers	5
	Sample interval	4
HOG [20]	Cell size	pixels
	Block size	cells
LDP [13]	Block size	pixels
	Bit numbers	8
	Prominent direction numbers	3
LDNP [14]	Block size	pixels
	Bit numbers	6
es-LBP [15]	Histogram categories	3
	Bin numbers per histogram	708/354/472
GDP [21]	Block size	pixels
	Bit numbers	8
LDDSCP	Block size	pixels
	Bit numbers	4