Table 3.

Comparison.

Reference	Our chip	[13]	[25]	[26]	[27]
Photosensors	Yes	No	Yes	Yes	Yes
Technology	0.18 μm 1P6M	FPGA	0.35 μm 1P5M	0.25 μm	0.6 μm 2P3M
PE area (μm2)	23 × 29	68 LE*	75.5 × 73.3	83 × 45	20 × 20
Stored bits per PE	8	N/A	32	4	N/A
PE Array	32 × 32	12 × 12	128 × 128	9 × 9	512 × 512
Image processing	6-Bit Gray	9-Bit Gray	8-Bit Gray	4-Bit Gray	Analog
Control Style	SIMD	Regular	SIMD/CNN	Complicated	Regular
Global features	Specific periphery	N/A	Non-specific Periphery	No exportation	Specific periphery
Programmability	High	Specific	High	Moderate	Low

^*the chip was implemented in FPGA, therefore the area account by LE is given.