Elements of information theory
Elements of information theory
Digital Image Processing (3rd Edition)
Digital Image Processing (3rd Edition)
Pattern Recognition and Machine Learning (Information Science and Statistics)
Pattern Recognition and Machine Learning (Information Science and Statistics)
Text luminance modulation for hardcopy watermarking
Signal Processing
Codec System Design for Continuous Color Barcode Symbols
CITWORKSHOPS '08 Proceedings of the 2008 IEEE 8th International Conference on Computer and Information Technology Workshops
A camera-based mobile data channel: capacity and analysis
MM '08 Proceedings of the 16th ACM international conference on Multimedia
Localization and Segmentation of A 2D High Capacity Color Barcode
WACV '08 Proceedings of the 2008 IEEE Workshop on Applications of Computer Vision
Document Image Processing for Paper Side Communications
IEEE Transactions on Multimedia
Document imaging security and forensics ecosystem considerations
Proceedings of the 10th ACM symposium on Document engineering
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The process of adding high-density information onto printed material enables and improves interesting hardcopy document applications, such as: security, authentication, physical-electronic round tripping, item-level tagging as well as consumer/product interaction. This investigation on robust and high capacity print codes aims to maximize information payload in a given printed page area, subject to robustness to distortions originated by printing and scanning processes and also to degradations introduced by user manipulation of printed documents. The novel approach includes statistical print-and- scan channel characterization, designing of robust segmentation, unsupervised Bayesian color classification with expectation-maximization algorithm for parameters estimation of a mixture of Gaussians model and design of error correction codes. Results illustrate the performance evaluated under real channel and distortions conditions. High payload is achieved with sufficient robustness to distortions resulting of regular office hardcopy document handling: print-and-scan channel and user manipulation.