Sciweavers

WACV
2012
IEEE
12 years 8 months ago
Dynamic and invisible messaging for visual MIMO
The growing ubiquity of cameras in hand-held devices and the prevalence of electronic displays in signage creates a novel framework for wireless communications. Traditionally, the...
Wenjia Yuan, Kristin J. Dana, Ashwin Ashok, Marco ...
ICASSP
2011
IEEE
13 years 4 months ago
Exposing duplicated regions affected by reflection, rotation and scaling
A commonly considered image manipulation is to conceal undesirable objects or people in the scene with a region of pixels copied from the same image. Forensic mechanisms aimed at ...
Sergio Bravo-Solorio, Asoke K. Nandi
TSMC
2010
13 years 7 months ago
Geometric Distortion Insensitive Image Watermarking in Affine Covariant Regions
Feature-based image watermarking schemes, which aim to survive various geometric distortions, have attracted great attention in recent years. Existing schemes have shown robustness...
Xinbo Gao, Cheng Deng, Xuelong Li, Dacheng Tao
IVC
2006
105views more  IVC 2006»
14 years 12 days ago
A partition approach for the restoration of camera images of planar and curled document
As camera resolution increases, high-speed non-contact text capture through a digital camera is opening up a new channel for text capture and understanding. Unfortunately, the cap...
Shijian Lu, Ben M. Chen, Chi Chung Ko
SSWMC
2004
14 years 1 months ago
Human perception of geometric distortions in images
We present in this paper the results of our study on the human perception of geometric distortions in images. The ultimate goal of this study is to devise an objective measurement...
Iwan Setyawan, Reginald L. Lagendijk
AAAI
2007
14 years 2 months ago
Photometric and Geometric Restoration of Document Images Using Inpainting and Shape-from-Shading
The popularity of current hand-held digital imaging devices such as camera phones, PDAs, camcorders has promoted the use of digital cameras to capture document images for daily in...
Li Zhang, Andy M. Yip, Chew Lim Tan
DAGM
2003
Springer
14 years 5 months ago
Shape Preservation during Digitization: Tight Bounds Based on the Morphing Distance
We define strong r-similarity and the morphing distance to bound geometric distortions between shapes of equal topology. We then derive a necessary and sufficient condition for a ...
Peer Stelldinger, Ullrich Köthe
IH
2005
Springer
14 years 6 months ago
On the Intractability of Inverting Geometric Distortions in Watermarking Schemes
We examine the problem of watermarking schemes robust against geometric distortions from a complexity theoretic point of view. The main results presented are polynomial time reduct...
Maciej Liskiewicz, Ulrich Wölfel
ICPR
2006
IEEE
15 years 1 months ago
Document Flattening through Grid Modeling and Regularization
For document images captured by a digital camera, perspective and geometric distortions make it hard to recognize the document content properly. In this paper, we propose an integ...
Chew Lim Tan, Shijian Lu
CVPR
2007
IEEE
15 years 2 months ago
Geometric Modeling and Calibration of Planar Multi-Projector Displays Using Rational Bezier Patches
In order to achieve seamless imagery in a planar multiprojector display, geometric distortions and misalignment of images within and across projectors have to be removed. Camera-b...
Ezekiel S. Bhasker, Aditi Majumder