CAJ | 학술논문

针对文档图像的倾斜校正问题,提出了一种新的基于投影的文档图像倾斜角检测方法.首先采用一种高效的像素遍历算法对文档图像从不同角度进行投影,然后对投影数据进行累加求和,通过比较不同角度下的累加和来确定倾斜角度.该方法在投影过程中只需对文档图像进行极少部分投影,因而大大减少了运算量.基于该方法的特点,提出了由"粗"到"精"的投影策略,在确保检测精度的同时大幅提高了检测速度.实验结果表明,方法非常有效,可以获得很高的检测精度.
침대문당도상적경사교정문제,제출료일충신적기우투영적문당도상경사각검측방법.수선채용일충고효적상소편력산법대문당도상종불동각도진행투영,연후대투영수거진행루가구화,통과비교불동각도하적루가화래학정경사각도.해방법재투영과정중지수대문당도상진행겁소부분투영,인이대대감소료운산량.기우해방법적특점,제출료유"조"도"정"적투영책략,재학보검측정도적동시대폭제고료검측속도.실험결과표명,방법비상유효,가이획득흔고적검측정도.
Aiming at the skew correction of document image,a novel skew correction method based on projection is proposed. Firstly,it projects the document image from different views using an efficient pixels traversal algorithm.Then,it calculates the sum of projection data and the skew angle can be determined by comparing these sums of different views.Since only very few part of the document image is projected during the procedure of projection,large amount of operations are saved.Based on the character of this method,a strategy of projection from rough to fine is proposed,which can greatly improve the speed and ensure the accu-racy of detection.The experimental results show that the proposed method is very effective and can achieve very high accuracy.