Histogram-equalization-based adaptive image sensor for real-time vision

被引：23
|
作者：
Ni, Y [1 ]
Devos, F [1 ]
Boujrad, M [1 ]
Guan, JH [1 ]
机构：
[1] UNIV PARIS 11,INST ELECT FONDAMENTALE,F-91405 ORSAY,FRANCE
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 1997年 / 32卷 / 07期
关键词：
histogram equalization; image sensors; machine vision; VLSI;
D O I：
10.1109/4.597293
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Image sensing and coding are essential to vision machines. This paper presents an adaptive image sensor by using iii situ histogram equalization. With this histogram-equalization-based adaptation, this image sensor can adapt automatically to different lighting conditions without frame delay and provides a constant image signal excursion range. A CMOS prototype chip of 64 x 64-pixel is presented where each pixel contains ten transistors and occupies 50 x 50 mu m(2) in a classic 1-mu m double-metal single-poly process. The experimental results confirm an adaptation over illumination variation of 1:5000.
引用
收藏
页码：1027 / 1036
页数：10
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