DocumentCode
2581533
Title
Extraction of Answer Image of Choice Questions in Examination Paper
Author
Zhipeng, Xu
Author_Institution
Sch. of Phys. Sci. & Inf. Eng., Liaocheng Univ., Liaocheng, China
fYear
2012
fDate
19-22 Oct. 2012
Firstpage
417
Lastpage
418
Abstract
Firstly, the skewed image of examination paper is corrected by Hough transform, and then mathematical morphology methods are used to locate the frame lines in table. Then connected component analysis is utilized to locate the form region based on maximum area feature. Finally the form frame line is removed according to the vertical gradient, and the answer image is achieved by analyzing the coordinates of objects.
Keywords
Hough transforms; feature extraction; gradient methods; image processing; mathematical morphology; Hough transform; answer image extraction; choice questions; examination paper; mathematical morphology; skewed image; vertical gradient; Algorithm design and analysis; Computers; Educational institutions; Image edge detection; Morphology; Optical character recognition software; Transforms; document image processing; form recognition; mathematical morphology;
fLanguage
English
Publisher
ieee
Conference_Titel
Distributed Computing and Applications to Business, Engineering & Science (DCABES), 2012 11th International Symposium on
Conference_Location
Guilin
Print_ISBN
978-1-4673-2630-8
Type
conf
DOI
10.1109/DCABES.2012.69
Filename
6385321
Link To Document