4 March 2015 Edge detection and reduction of brightness of students’ bubble form images
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Proceedings Volume 9443, Sixth International Conference on Graphic and Image Processing (ICGIP 2014); 94430F (2015) https://doi.org/10.1117/12.2178842
Event: Sixth International Conference on Graphic and Image Processing (ICGIP 2014), 2014, Beijing, China
Abstract
Optical Mark Recognition (OMR) is a traditional data input technique and an important human computer interaction technique which is widely used in education testing. This paper proposes a new idea for grading multiple-choice test which is based on a camera on smartphone. The system key techniques and relevant implementations, which include the image scan, edge detection and reduction of brightness on colorful bubble form images, are presented.
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Sümeyya İlkin, Sümeyya İlkin, Suhap Şahin, Suhap Şahin, } "Edge detection and reduction of brightness of students’ bubble form images", Proc. SPIE 9443, Sixth International Conference on Graphic and Image Processing (ICGIP 2014), 94430F (4 March 2015); doi: 10.1117/12.2178842; https://doi.org/10.1117/12.2178842
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