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Proceedings Paper

A real-time enhanced technique for CMOS image sensor based on dynamic area threshold
Author(s): Zaifeng Shi; Chao Shi; Xiaodong Xie; Suying Yao; Qingjie Cao
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Paper Abstract

A real-time enhanced technique which can accelerate the processing time and provide a more distinct image using dynamic area threshold was presented. It can compensate the flaw of the image which captured by CMOS sensor. According to the value of statistic result, dynamic increasing algorithm would be used to change the contrast and brightness via local area pixels enhancement while pixels' real value is larger than the upper threshold. On the converse, if the real value of pixels is below the lower threshold, dynamic decreasing algorithm would be used in them to darker these pixels more than these which are above the upper threshold value. The edge of the dynamic area would be analyzed and provide an appropriate way to process these edge pixels, which will let them be the usual gradual edge in the dynamic area. And this algorithm is implemented in FPGA of Xilinx XUPV4 with an MCU which can control the area where we are interested in to increase the quality efficiently.

Paper Details

Date Published: 6 August 2009
PDF: 7 pages
Proc. SPIE 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, 73842N (6 August 2009); doi: 10.1117/12.836534
Show Author Affiliations
Zaifeng Shi, Tianjin Univ. (China)
Chao Shi, Tianjin Univ. (China)
Xiaodong Xie, Tianjin Univ. (China)
Suying Yao, Tianjin Univ. (China)
Qingjie Cao, Tianjin Normal Univ. (China)


Published in SPIE Proceedings Vol. 7384:
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications
Kun Zhang; Xiang-jun Wang; Guang-jun Zhang; Ke-cong Ai, Editor(s)

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