A 3-Wafer-Stacked Hybrid 15MPixel CIS + 1 MPixel EVS with 4.6GEvent/s Readout, In-Pixel TDC and On-Chip ISP and ESP Function
Menghan Guo, Shoushun Chen, Zhe Gao, Wenlei Yang, Peter Bartkovjak, Qing Qin, Xiaoqin Hu, Dahei Zhou, Masayuki Uchiyama, Yoshiharu Kudo, Shimpei Fukuoka, Chengcheng Xu, Hiroaki Ebihara, Andy Wang, Peiwen Jiang, Bo Jiang, Bo Mu, Huan Chen, Jason Yang, TJ Dai, Andreas Suess
Abstract
Event Vision Sensors (EVS) determine, at pixel level, whether a temporal contrast change beyond a predefined threshold is detected [1–6]. Compared to CMOS image sensors (CIS), this new modality inherently provides data-compression functionality and hence, enables high-speed, low-latency data capture while operating at low power. Numerous applications such as object tracking, 3D detection, or slow-motion are being researched based on EVS [1]. Temporal contrast detection is a relative measurement and is encoded by so-called “events” being further characterized through x/y pixel location, event time-stamp (t) and the polarity (p), indicating whether an increase or decrease in illuminance has been detected.