IMPACT Final Conference - NCSR - Page curl correction

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

24-25 October 2011, London, UK

IMPACT Tools Developed by NCSR

IMPACT Final Conference 2011

B. Gatos Computational Intelligence LaboratoryInstitute of Informatics and TelecommunicationsNational Center for Scientific Research (NCSR) "Demokritos"GR-153 10 Agia Paraskevi, Athens, Greece

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

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Page_Curl_Correction _v4 [0|1] [infile] [outfile]

parameter [0|1]: 0 -> coarse & fine correction, 1 -> only coarse correction

parameter [infile]: Input filename (b/w or gray scale image)

parameters [outfile] : Output filename (b/w or gray scale image) + web service implementationIMPACT Tools Developed by NCSR - IMPACT Final Conference 2011, 24-25 October, London, UK

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

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A computationally low cost transformation which addresses the projection of a curved surface to a 2D rectangular area

Fine correction based on text line & word segmentation

N. Stamatopoulos, B. Gatos, I. Pratikakis, S.J. Perantonis, “Goal-oriented Rectification of Camera-Based Document Images”, IEEE Transactions on Image Processing, DOI: 10.1109/TIP.2010.2080280, 2010

IMPACT Tools Developed by NCSR - IMPACT Final Conference 2011, 24-25 October, London, UK

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

4IMPACT Tools Developed by NCSR - IMPACT Final Conference 2011, 24-25 October, London, UK

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

5IMPACT Tools Developed by NCSR - IMPACT Final Conference 2011, 24-25 October, London, UK

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

6IMPACT Tools Developed by NCSR - IMPACT Final Conference 2011, 24-25 October, London, UK

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

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Only Coarse Correction Coarse + Fine Correction

Av=4.2 Av=4.5

1. Lot of page curl added to the result

2. Some curl added to the result

3. Only part of the page curl has been corrected

4. Most of the page curl has been corrected

5. Page Curl has been corrected

14706 images to

test Page Curl Correction

IMPACT Tools Developed by NCSR - IMPACT Final Conference 2011, 24-25 October, London, UK

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

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Only Coarse Correction Coarse + Fine Correction

Av=3.9

3009x2 = 6018 images to

test page split

1. Lot of page curl added to the result

2. Some curl added to the result

3. Only part of the page curl has been corrected

4. Most of the page curl has been corrected

5. Page Curl has been corrected

Av=3.7

IMPACT Tools Developed by NCSR - IMPACT Final Conference 2011, 24-25 October, London, UK

IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

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IMPACT Page Curl Correction v.4

87.78%(81.98% only coarse correction)

BookRestorer

80.87%N. Stamatopoulos, B. Gatos and I. Pratikakis, "A Methodology for Document Image Dewarping Techniques Performance Evaluation", 10th International Conference on Document Analysis and Recognition (ICDAR'09), pp. 956-960, Barcelona, Spain, July 2009.

IMPACT Tools Developed by NCSR - IMPACT Final Conference 2011, 24-25 October, London, UK