A Time-Memory-based CMOS Vision Sensor with In-Pixel Temporal Derivative Computing for Multi-Mode Image Processing

This paper presents in-pixel and near-pixel processing circuit techniques for multi-mode processing CMOS vision sensor. The new design includes a checkerboard patch-based pixel circuit and column-shared frame difference processing circuits that detect a patch-level temporal change and generate lb ev...

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Bibliographic Details
Main Authors: Jee, Dong-Woo, Ko, Seong-Min, Kasichainula, Kishore, Yeo, Injune, Cao, Yu, Seo, Jae-Sun
Format: Conference Proceeding
Language:English
Subjects:
CMOS process
Europe
Event detection
frame difference
Image processing
in-pixel processing
in-sensor computing
Memory management
Motion detection
multi-mode image processing
nearpixel processing
temporal derivative
vision sensor
Vision sensors
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Description
Summary:This paper presents in-pixel and near-pixel processing circuit techniques for multi-mode processing CMOS vision sensor. The new design includes a checkerboard patch-based pixel circuit and column-shared frame difference processing circuits that detect a patch-level temporal change and generate lb event signal. In-pixel time memory circuit is proposed to process a temporal derivative of the event in both area and power efficient way. The 324× 252 vision sensor is implemented in 0.18 \mum CMOS process and consumes 4.79 \muW @12.5fps showing FoM of 42.2pJ/pix. frame in the patch mode operation for frame difference-based motion detection and temporal derivative generation.
ISSN:2643-1319
DOI:10.1109/ESSCIRC59616.2023.10268817