基于模拟视频信号差分和射影畸变校正的图像系统

doi:10.3969/j.issn.1006-2475.2013.12.021

计算机与现代化

基于模拟视频信号差分和射影畸变校正的图像系统

应毅辰,王晓年,朱劲

同济大学电子与信息工程学院,上海201804

收稿日期:2013-07-08 修回日期:1900-01-01 出版日期:2013-12-18 发布日期:2013-12-18

Image Processing System Based on Analog Video Signal Differential and Projective Distortion Rectification

YING Yi-chen, WANG Xiao-nian, ZHU Jin

School of Electronics and Information Engineering, Tongji University, Shanghai 201804, China

Received:2013-07-08 Revised:1900-01-01 Online:2013-12-18 Published:2013-12-18

摘要/Abstract

摘要： 视觉传感器越来越多地应用到嵌入式系统中，通常对视频信号的处理是先对模拟信号数字化，然后再利用嵌入式处理器进行计算。大量的数据和处理器处理能力的差异尤为显著，以至于限制了视觉传感器的广泛使用。本文提出一种基于硬件的模拟差分处理以及射影畸变校正的图像系统，通过像素模拟信号的差分实现边缘检测，同时通过查表校正在摄像头的像平面与地面不平行时产生的图像射影畸变，便于后续的图像处理和模式识别。该方法提高了信号处理的实时性，减轻了视觉传感器对处理能力的依赖。
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关键词: 差分处理, 非均匀采样, 射影畸变, 图像校正

Abstract: The video camera is widely applied to embedded systems. Before further processed by the embedded systems, the analog video signal is usually digitized first. The large amount of data has made the difference of the processing capability much significant, and that limits the widespread use of vision sensor. An analog video signal processing system with differential and image rectification is proposed, in which the differential between pixel in analog signal is used to detect the edge. Meanwhile, the projective distortion is corrected according to lookup table. It is easier for further processing after the rectification of projective distortion. The solution improves the real time of signal processing and reduces the dependence on processing capability.
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Key words: difference processing, non-uniform sampling, projective distortion, image rectification

应毅辰,王晓年,朱劲 . 基于模拟视频信号差分和射影畸变校正的图像系统[J]. 计算机与现代化, doi: 10.3969/j.issn.1006-2475.2013.12.021 .

YING Yi-chen, WANG Xiao-nian, ZHU Jin . Image Processing System Based on Analog Video Signal Differential and Projective Distortion Rectification[J]. Computer and Modernization, doi: 10.3969/j.issn.1006-2475.2013.12.021 .

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基于模拟视频信号差分和射影畸变校正的图像系统

Image Processing System Based on Analog Video Signal Differential and Projective Distortion Rectification

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