计算机系统应用
計算機繫統應用
계산궤계통응용
APPLICATIONS OF THE COMPUTER SYSTEMS
2010年
2期
147-151
,共5页
畸变校正%透视变形%图像二值化%摄像头阅卷
畸變校正%透視變形%圖像二值化%攝像頭閱捲
기변교정%투시변형%도상이치화%섭상두열권
distortion correction%perspective distortion%image binarization%camera-based information-card scoring
在分析各类图像阅卷系统的基础上,阐述了摄像头阅卷系统中需要解决的关键技术问题有:对光照不均的图像处理,透视变形图像的校正处理.提出对图像进行二值化处理时采用局部平均阈值解决光照不均匀的问题;采用的基于矩形角点几何变换的畸变图像校正算法,分两步完成图像的倾斜校正和透视校正,并给出了变换公式.实践表明系统中采用的算法处理速度快、畸变图像校正效果好,图像识别率高,达到实用要求.
在分析各類圖像閱捲繫統的基礎上,闡述瞭攝像頭閱捲繫統中需要解決的關鍵技術問題有:對光照不均的圖像處理,透視變形圖像的校正處理.提齣對圖像進行二值化處理時採用跼部平均閾值解決光照不均勻的問題;採用的基于矩形角點幾何變換的畸變圖像校正算法,分兩步完成圖像的傾斜校正和透視校正,併給齣瞭變換公式.實踐錶明繫統中採用的算法處理速度快、畸變圖像校正效果好,圖像識彆率高,達到實用要求.
재분석각류도상열권계통적기출상,천술료섭상두열권계통중수요해결적관건기술문제유:대광조불균적도상처리,투시변형도상적교정처리.제출대도상진행이치화처리시채용국부평균역치해결광조불균균적문제;채용적기우구형각점궤하변환적기변도상교정산법,분량보완성도상적경사교정화투시교정,병급출료변환공식.실천표명계통중채용적산법처리속도쾌、기변도상교정효과호,도상식별솔고,체도실용요구.
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 comer-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.
