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Research Fellow  |  Hwang, Wen-Liang  
 
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Patents
 
 
Patent:INFORMATION HIDING WITH SIMILAR STRUCTURES
Inventors:Wen-liang Hwang, Yu-Chen Shu
Country:USA
Date of Patent:2013/02/05–2031/08/11
Abstract:
 
Patent:Iris recognition method Utilizing Matching Pursuit Algorithm
Inventors:Wen-gang Che ; Jian-liang Lin ; Wen-liang Huang ; Chung-ling Huang
Country:USA
Date of Patent:2011/04/05–2011/04/05
Abstract:
 
Patent:System and method for encoding a data set
Inventors:Wen-liang Hwang, Tsung-Han Lee
Country:Taiwan
Date of Patent:2011/01–2011/01
Abstract:
 
Patent:Asymmetric subspace watermarking
Inventors:Wen-Liang Hwang, Jeng-Nan Tzeng, I-Liang Chern
Country:USA
Date of Patent:2009/09/08–2009/09/08
Abstract:

According to an asymmetric watermarking technology, which is particularly resistant to projection attack, an original image is analyzed to obtain its watermarking space. The watermarking space is then divided to obtain two orthogonal subspaces g and h. An embedding key G, which is a matrix and which columns form bases of subspace g, is selected and a matrix H, HTG=0 is calculated. Columns of matrix H form bases of subspace h. A detecting key D, which equals the sum D= GT=BHT, wherein B is a matrix, is calculated, and a watermark w is obtained and embedded into the original image φ0 to obtain a watermarked image φw0+Gw, wherein Dφ0=m0 is not a 0 vector.

 
Patent:System and method for encoding a data set
Inventors:Hwang, Wen-liang , Lee, Tsung-han
Country:USA
Date of Patent:2009/07/14–2009/07/14
Abstract:

An encoding system for a data set, particularly for a video data set is disclosed in the present invention. The encoding system includes a coding strategies represented as a tree-based structure, a cost projection system for each tree node, and a parameter searching algorithm for coding strategies to encode a data set. When the encoder parameters are obtained, the coding strategies and rate-allocation have better performance comparing to the related art.

 
Patent:Coding and decoding of video data
Inventors:Hwang; Wen-Liang, and Lin; Jian-Liang
Country:USA
Date of Patent:2007/07/10–2007/07/10
Abstract:

This is a novel method for coding and decoding video data. The invented method provides an FGS (fine grained scalability) algorithm using bit plane coding technique. While conducting the bit plane encoding, the spatial and temporal dependence between bit planes is used to exploit the redundancy in the bit planes. In the embodiment of this invention, the bit plains are represented by quadtrees and bit plane prediction is made to remove the spatial and temporal redundancy in a video. The scalability of the video data is fine grained since atoms of the motion residuals do not have to be grouped as coding units.

 
 
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