Document degradation models and a methodology for degradation model validation
Document degradation models and a methodology for degradation model validation
Proceedings of the 25th annual conference on Computer graphics and interactive techniques
Inverse global illumination: recovering reflectance models of real scenes from photographs
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
Meshless parameterization and surface reconstruction
Computer Aided Geometric Design
Image-based modeling and photo editing
Proceedings of the 28th annual conference on Computer graphics and interactive techniques
Least squares conformal maps for automatic texture atlas generation
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
Full-Spectral Color Calculations in Realistic Image Synthesis
IEEE Computer Graphics and Applications
Recovering Shading from Color Images
ECCV '92 Proceedings of the Second European Conference on Computer Vision
ECCV '02 Proceedings of the 7th European Conference on Computer Vision-Part IV
Structural Rectification of Non-planar Document Images: Application to Graphics Recognition
GREC '01 Selected Papers from the Fourth International Workshop on Graphics Recognition Algorithms and Applications
ICCV '95 Proceedings of the Fifth International Conference on Computer Vision
ACM SIGGRAPH 2003 Papers
Rectifying the Bound Document Image Captured by the Camera: A Model Based Approach
ICDAR '03 Proceedings of the Seventh International Conference on Document Analysis and Recognition - Volume 1
Correcting Document Image Warping Based on Regression of Curved Text Lines
ICDAR '03 Proceedings of the Seventh International Conference on Document Analysis and Recognition - Volume 1
A Cylindrical Surface Model to Rectify the Bound Document Image
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Image Restoration of Arbitrarily Warped Documents
IEEE Transactions on Pattern Analysis and Machine Intelligence
Estimation of 3D Shape of Warped Document Surface for Image Restoration
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 1 - Volume 01
Document capture using stereo vision
Proceedings of the 2004 ACM symposium on Document engineering
Axioms and variational problems in surface parameterization
Computer Aided Geometric Design - Special issue: Geometric modeling and processing 2004
3D Geometric and Optical Modeling of Warped Document Images from Scanners
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01
Conformal Deskewing of Non-Planar Documents
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01
Flattening Curved Documents in Images
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 2 - Volume 02
Geometric and Photometric Restoration of Distorted Documents
ICCV '05 Proceedings of the Tenth IEEE International Conference on Computer Vision - Volume 2
Restoring Warped Document Images through 3D Shape Modeling
IEEE Transactions on Pattern Analysis and Machine Intelligence
A Fast and Stable Approach for Restoration of Warped Document Images
ICDAR '05 Proceedings of the Eighth International Conference on Document Analysis and Recognition
Document Image Dewarping using Robust Estimation of Curled Text Lines
ICDAR '05 Proceedings of the Eighth International Conference on Document Analysis and Recognition
What is the range of surface reconstructions from a gradient field?
ECCV'06 Proceedings of the 9th European conference on Computer Vision - Volume Part I
Geometric and shading correction for images of printed materials using boundary
IEEE Transactions on Image Processing
Robust registration of manuscript images
Proceedings of the 9th ACM/IEEE-CS joint conference on Digital libraries
Composition of a dewarped and enhanced document image from two view images
IEEE Transactions on Image Processing
SMC'09 Proceedings of the 2009 IEEE international conference on Systems, Man and Cybernetics
Retrospective illumination correction of retinal images
Journal of Biomedical Imaging
Asset digitization: moving beyond facsimile
SIGGRAPH Asia 2012 Technical Briefs
Proceedings of the 13th ACM/IEEE-CS joint conference on Digital libraries
3D reconstruction for damaged documents: imaging of the great parchment book
Proceedings of the 2nd International Workshop on Historical Document Imaging and Processing
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This paper presents a framework to restore the 2D content printed on documents in the presence of geometric distortion and non-uniform illumination. Compared with textbased document imaging approaches that correct distortion to a level necessary to obtain sufficiently readable text or to facilitate optical character recognition (OCR), our work targets nontextual documents where the original printed content is desired. To achieve this goal, our framework acquires a 3D scan of the document’s surface together with a high-resolution image. Conformal mapping is used to rectify geometric distortion by mapping the 3D surface back to a plane while minimizing angular distortion. This conformal "deskewing" assumes no parametric model of the document’s surface and is suitable for arbitrary distortions. Illumination correction is performed by using the 3D shape to distinguish content gradient edges from illumination gradient edges in the high-resolution image. Integration is performed using only the content edges to obtain a reflectance image with significantly less illumination artifacts. This approach makes no assumptions about light sources and their positions. The results from the geometric and photometric correction are combined to produce the final output.