发明名称 |
Circuit for detecting discontinuities in light intensity including two independent resistive networks |
摘要 |
A computer vision edge-detection circuit uses two independent resistive networks to smooth the voltages supplied by an array of logarithmic photoreceptors. The voltages on the two networks are substracted and exclusive-or circuitry is used to detect zero-crossings. In order to facilitate thresholding of the edges, an additional current is computed at each node indicating the strength of the zero-crossing. This is particularly important for robust real-world performance where there will be many small zero-crossings induced by noise. Implementation of the present invention using analog VLSI techniques makes it feasible, and, in fact, practical to provide a large plurality of such photoreceptors on a single integrated circuit chip. Such chips can provide image acquisition and edge-detection with noise elimination in one chip in real time.
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申请公布号 |
US5086219(A) |
申请公布日期 |
1992.02.04 |
申请号 |
US19900620493 |
申请日期 |
1990.11.30 |
申请人 |
CALIFORNIA INSTITUTE OF TECHNOLOGY |
发明人 |
KOCH, CHRISTOF;BAIR, WYETH |
分类号 |
H04N5/14 |
主分类号 |
H04N5/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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