@article{oai:u-ryukyu.repo.nii.ac.jp:02001620,
 author = {除川, 幸子 and 山城, 毅 and Yokegawa, Sachiko and Yamashiro, Tsuyoshi},
 issue = {57},
 journal = {琉球大学工学部紀要},
 month = {Mar},
 note = {Binarization of Character Images is very important preprocessing for character recoginition system. And to reduce processing time is very important. Our study is how to binarize character images which were taken with CCD camera. CCD camera has some advantages of such as its input area is free and also input speed is fast. But as weak point, it has shading for bad lighting conditions. Therefore, we studied how to Binarize character images with shading. We decided the threshold by segmentate the region and by the proposed simple method process time was reduced., 紀要論文},
 pages = {41--45},
 title = {シェーディングのある文字画像の二値化に関する研究},
 year = {1999}
}