NDLI: A low power multi-mode CMOS image sensor with integrated on-chip motion detection

Content Provider	IEEE Xplore Digital Library
Author	Xilin Liu Milin Zhang Van der Spiegel, J.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Syst. Eng. (ESE), Univ. of Pennsylvania, Philadelphia, PA, USA (Xilin Liu; Milin Zhang; Van der Spiegel, J.)
Abstract	In this paper, we propose a novel low power multimode CMOS smart image sensor node with integrated focal-plane motion detection and video compression. An 80×80 image pixel array is fabricated in 0.5 μm 3M2P standard CMOS technology, occupying 3×3 $mm^{2}$ silicon area. The proposed imager enables various operational modes, including 1) event generator mode, 2) motion tracking mode and 3) video output mode in full-resolution or compression by region of interest (ROI). An ultra low power focal-plane motion detection block, consisting of analog memory and dual-threshold comparator, is integrated in the pixel-level circuit for on-chip motion detection. A hardware-friendly motion tracking algorithm is developed that indicates ROIs according to a strategy based on the detection results. A 12-bit on-chip, off-array ADC is employed to convert the captured light intensity into digital readouts. In order to further reduce the power consumption, lower image resolution is used under the first two modes. A trade-off analysis between the image resolution and detection accuracy is proposed in this paper. In simulation, the total power consumption is 10μW at a frame rate of 30fps and a supply voltage of 3.3V in motion tracking mode. A compression ratio of 14% and an average PSNR of 42dB is achieved in compressive video output mode.
Starting Page	2416
Ending Page	2419
File Size	622265
Page Count	4
File Format	PDF
ISBN	9781467357609
ISSN	02714302
e-ISBN	9781467357623
DOI	10.1109/ISCAS.2013.6572366
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tracking Motion detection Arrays Image coding CMOS integrated circuits Image sensors Integrated circuit modeling compressive image acquisition CMOS image sensor multi-mode imager low power pixel-level motion detector
Content Type	Text
Resource Type	Article

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