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Optical Engineering

Artificial retina large scale integration with on-sensor projection function for high-speed motion detection
Author(s): Eiichi Funatsu; Soichiro Kuramochi; Yoji Nagafuchi; Hiroshi Kage; Narumi Sakashita; Fumihide Murao; Kazuo Kyuma
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Paper Abstract

We present an artificial retina (AR) large scale integration (LSI) with a high accuracy on-sensor image projection function. The fabricated chip has 32×32 pixels, and each pixel is 56×56 μm2 large with a 41.5% fill factor. This AR LSI compresses 1024 bytes of input image data to 64 bytes of data by computing projection at the same time of image detection, on the focal plane. It also has a function of modulating the projection data into the form of spatial and temporal differentiation data, which fit a motion detection algorithm. Effectiveness of this function was proved by a motion detection experiment capturing an electric fan rotating from 775 to 1500 rpm speed. High sensitivity of 20 V/lx sec and wide dynamic range of 66 dB are also beneficial for high frame rates that lead to high-speed motion detection. Therefore, the AR LSI makes it possible to build a high-speed motion detection system even in combination with an 8-bit microcontroller. This proves how effective it is to combine the processing function of the AR LSI and the recognition function of the microcontroller to build up low cost image processing systems.

Paper Details

Date Published: 1 November 2002
PDF: 10 pages
Opt. Eng. 41(11) doi: 10.1117/1.1511745
Published in: Optical Engineering Volume 41, Issue 11
Show Author Affiliations
Eiichi Funatsu, Mitsubishi Electric Corp. (Japan)
Soichiro Kuramochi, Mitsubishi Electric Corp. (Japan)
Yoji Nagafuchi, Mitsubishi Electric Corp. (Japan)
Hiroshi Kage, Mitsubishi Electric Corp. (Japan)
Narumi Sakashita, Mitsubishi Electric Corp. (Japan)
Fumihide Murao, Mitsubishi Electric Corp. (Japan)
Kazuo Kyuma, Mitsubishi Electric Corp. (Japan)

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