A second-generation noise-immune motion detection image sensor for moving object tracking application

In this paper, we present a noise-immune high-speed motion detection CMOS image sensor. The proposed architecture is quite appealing for motion object tracking applications as it can detect motion with a high immunity to random noise. Our pixel has a front-end event generator to detect and convert temporal light intensity changes into binary events. By on-chip implementing an event-clustering algorithm using a mixed-mode circuit to process these events, our proposed sensor can remove random discrete noise events while report only active motion events to the off-chip post imaging processors. The proposed testing structure was implemented with a 5×5 pixel array in a standard 65-nm CMOS process. Each pixel occupies an area of 35×35 μm² with a fill factor of ~15%. Power consumption for each pixel is ~5.4 μw under 1.8 V power supply.