The variational approach to shape from shading
Computer Vision, Graphics, and Image Processing
A Shape From Shading Analysis for a Single Perspective Image of a Polyhedron
IEEE Transactions on Pattern Analysis and Machine Intelligence
Shape from shading
International Journal of Computer Vision
Shape from shading with perspective projection
CVGIP: Image Understanding
International Journal of Computer Vision
IEEE Transactions on Pattern Analysis and Machine Intelligence
Beyond 2D images: effective 3D imaging for library materials
DL '00 Proceedings of the fifth ACM conference on Digital libraries
Document Image De-warping for Text/Graphics Recognition
Proceedings of the Joint IAPR International Workshop on Structural, Syntactic, and Statistical Pattern Recognition
Former books digital processing: image warping
DIA '97 Proceedings of the 1997 Workshop on Document Image Analysis
A Divide-and-conquer Strategy in Shape from Shading Problem
CVPR '97 Proceedings of the 1997 Conference on Computer Vision and Pattern Recognition (CVPR '97)
Nonlinear Shape Restoration For Document Images
CVPR '96 Proceedings of the 1996 Conference on Computer Vision and Pattern Recognition (CVPR '96)
Coupled Lighting Direction and Shape Estimation from Single Images
ICCV '99 Proceedings of the International Conference on Computer Vision-Volume 2 - Volume 2
Recovery of Distorted Document Images from Bound Volumes
ICDAR '01 Proceedings of the Sixth International Conference on Document Analysis and Recognition
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
A New Perspective [on] Shape-from-Shading
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
"Perspective Shape from Shading" and Viscosity Solutions
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
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 1 - Volume 01
Towards Shape from Shading under Realistic Photographic Conditions
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 2 - Volume 02
Reconstruction of Medical Images by Perspective Shape-from-Shading
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 3 - Volume 03
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
Some remarks on perspective shape-from-shading models
SSVM'07 Proceedings of the 1st international conference on Scale space and variational methods in computer vision
User-guided shape from shading to reconstruct fine details from a single photograph
ACCV'07 Proceedings of the 8th Asian conference on Computer vision - Volume Part I
Shape from contour for the digitization of curved documents
ACCV'07 Proceedings of the 8th Asian conference on Computer vision - Volume Part II
SIAM Journal on Imaging Sciences
Perspective Shape from Shading: Ambiguity Analysis and Numerical Approximations
SIAM Journal on Imaging Sciences
Digitization of deformed documents using a high-speed multi-camera array
ACCV'12 Proceedings of the 11th Asian conference on Computer Vision - Volume Part II
Hi-index | 0.00 |
Document digitization is faster and more affordable using digital cameras than scanners. On the other hand, if we aim at extending the basic digital camera functionalities for such a purpose, post-processings will be of first importance, at least to improve the text legibility. In this paper, we address the specific problem of the virtual flattening of curved documents, as for example the pages of an opened book lying on its spine. In order to compute the document shape, we use the shape from shading technique and discuss why, in some cases, it is more suitable than other 3D single-view reconstruction techniques. We extend the seminal work by Wada et al. (Proceedings of the IAPR Workshop on machine vision and applications, Tokyo, Japan, pp. 591–594, 1992) and consecutive papers, reformulating the problem in terms of perspective shape from shading. Finally, we design a complete post-processing algorithm and test it on real images. Even if the documents are much curved, it is shown that the restored images are almost identical to scanned images of the flattened documents.