%0 Journal Article
%T Key Techniques of Camera-Based Information-Card Scoring System and Its Application<br>摄像头阅卷系统关键技术的分析与应用
%A WU Bai-Xiong
%A <br>吴柏雄
%J 计算机系统应用
%D 2010
%I 
%X In analyzing the various types of image-based scoring system, the key techniques of camera-based information-card scoring system are given: uneven illumination of the image processing, lens distortion correction image processing. This paper proposes binarization image processing with the local average threshold to solve the problem of uneven illumination. It uses rectangular corner-based geometric aberra- tion transform image correction algorithm, which include two steps to complete the correction skew dis- tortion and perspective distortion. It also gives the transformation formula. Practice shows that this method performs well, and meets the functional requirements.
%K distortion correction
%K perspective distortion
%K image binarization
%K camera-based information-card scoring<br>畸变校正
%K 透视变形
%K 图像二值化
%K 摄像头阅卷
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D4F6864C950C88FFCE5B6C948A639E39&aid=1D8B9F34813C8AD0F3C174DA3E951E89&yid=140ECF96957D60B2&vid=2A8D03AD8076A2E3&iid=0B39A22176CE99FB&sid=2922B27A3177030F&eid=70AC2EF7F2065E09&journal_id=1003-3254&journal_name=计算机系统应用&referenced_num=0&reference_num=12