A 64x64 pixel vision sensor performs adaptive background subtraction and event detection at very low power consumption. The chip is based on a VLSI-oriented vision algorithm, implemented at pixel-level, mimicking the basic process of pre-attentive visual perception. Anomalous pixel behaviors are detected and coded into a 2-bit/pixel. Each pixel integrates two programmable Switched-Capacitors Low-Pass Filters and two clocked comparators, which are fundamental blocks for the execution of the vision algorithm. The 45T square pixel has a pitch of 26μm and a fill factor of 12%. The vision sensor consumes 33μW at 13 fps and 3.3V. This turns into a computing performance of 42 GOPS/W and 4 GOPS/mm 2, which are values aligned with the most advanced computational vision sensors. © 2012 ACM.
A 33 μw 42 GOPS/W 64x64 pixel vision sensor with dynamic background subtraction for scene interpretation
Passerone, Roberto;
2012-01-01
Abstract
A 64x64 pixel vision sensor performs adaptive background subtraction and event detection at very low power consumption. The chip is based on a VLSI-oriented vision algorithm, implemented at pixel-level, mimicking the basic process of pre-attentive visual perception. Anomalous pixel behaviors are detected and coded into a 2-bit/pixel. Each pixel integrates two programmable Switched-Capacitors Low-Pass Filters and two clocked comparators, which are fundamental blocks for the execution of the vision algorithm. The 45T square pixel has a pitch of 26μm and a fill factor of 12%. The vision sensor consumes 33μW at 13 fps and 3.3V. This turns into a computing performance of 42 GOPS/W and 4 GOPS/mm 2, which are values aligned with the most advanced computational vision sensors. © 2012 ACM.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
