Answer Sheet Recognition System Using Smartphone

• Main Authors: Hao-Hsuan Chen, 陳浩軒
• Other Authors: Kuo-Kan Yu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/84753019482027938007

碩士 === 龍華科技大學 === 電子工程系碩士班 === 100 === The system we present is based on the Android system smartphone, which takes the picture of the computer scoring answer sheet and recognizes the answers, and scores the answers. The system is composed of three parts. The first part is the image processing. We acquire the answer sheet image by using the fixed size window and do the image processing; We first eliminate the influence of the illumination and binarize the image, then correct the skew image and normalize the image to a fixed size, and finally locate the answers by using contour detection. Then we compare the answers to the correct answers and score the answers. The second part is the development of user interface based on the Android system. The third part is the integration of Android system and OpenCV. The system can be easily used to recognize and score the computer scoring answer sheet using the Android system smartphone.