| Paper Abstract and Keywords |
| Presentation |
2013-12-09 13:00
Removal of Uneven Shading from Document Image for OCR Using Surface Fitting with Piecewise Polynomials
Xiaohua Zhang (Hiroshima Inst. of Tech.), Yuelan Xin (Qinghai Norm. Univ.), Ning Xie (Tokyo Inst. of Tech.), Wenbo Jiang (Xihua Univ.), Yue Zhao (Hiroshima Inst. of Tech.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
Binarization is regarded as a compulsory step to separate text and background. When document images are acquired under poor illumination, the images are soiled with uneven shading. This paper presents an approach for removing the uneven shading from document image. Piecewise polynomials are adopted in computing the background surface with complicated shading to be removed. The document image is divided into several blocks overlapped with each other to reduce the discontinuity between polynomials. The fitting is again adopted in the normalized image to estimate the coefficients of piecewise polynomials and the foreground text pixels are excluded as could as possible. Our experiments show that the proposed method can remove complicated shading well. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Document Image Binarization / Piecewise Polynomials / Shading Removal / Surface Estimation / / / / |
| Reference Info. |
ITE Tech. Rep., vol. 37, no. 56, ME2013-119, pp. 1-4, Dec. 2013. |
| Paper # |
ME2013-119 |
| Date of Issue |
2013-12-02 (ME) |
| ISSN |
Print edition: ISSN 1342-6893 |
| Download PDF |
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| Conference Information |
| Committee |
ME |
| Conference Date |
2013-12-09 - 2013-12-10 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Matuyasensen |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
ME |
| Conference Code |
2013-12-ME |
| Language |
English |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Removal of Uneven Shading from Document Image for OCR Using Surface Fitting with Piecewise Polynomials |
| Sub Title (in English) |
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| Keyword(1) |
Document Image Binarization |
| Keyword(2) |
Piecewise Polynomials |
| Keyword(3) |
Shading Removal |
| Keyword(4) |
Surface Estimation |
| Keyword(5) |
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| 1st Author's Name |
Xiaohua Zhang |
| 1st Author's Affiliation |
Hiroshima Institute of Technology (Hiroshima Inst. of Tech.) |
| 2nd Author's Name |
Yuelan Xin |
| 2nd Author's Affiliation |
Qinghai Normal University (Qinghai Norm. Univ.) |
| 3rd Author's Name |
Ning Xie |
| 3rd Author's Affiliation |
Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
| 4th Author's Name |
Wenbo Jiang |
| 4th Author's Affiliation |
Xihua University (Xihua Univ.) |
| 5th Author's Name |
Yue Zhao |
| 5th Author's Affiliation |
Hiroshima Institute of Technology (Hiroshima Inst. of Tech.) |
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| Speaker |
Author-1 |
| Date Time |
2013-12-09 13:00:00 |
| Presentation Time |
25 minutes |
| Registration for |
ME |
| Paper # |
ME2013-119 |
| Volume (vol) |
vol.37 |
| Number (no) |
no.56 |
| Page |
pp.1-4 |
| #Pages |
4 |
| Date of Issue |
2013-12-02 (ME) |