Browsing by Author "Chen, Yueh-Hong"

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Copyright protection for images with EXIF metadata
(2008)
Huang, Hsiang-Cheh
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Chen, Yueh-Hong
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Chen, Shin-Chang
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交大名義發表
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National Chiao Tung University
In this paper, we propose an application of robust watermarking with the aid of EXIF metadata in digital images. Application for robust watermarking is one of the major branches in digital rights management (DRM) systems. Furthermore, implementation schemes for robust watermarking generally alter selected pixels in the spatial domain, or corresponding coefficients in the transform domain, to accomplish the embedding process. We consider not only the pixels or coefficients in the images, but we also employ the EXIF metadata, which serves as the role of watermark, to further protect the copyrights. Taking the manufacturer, camera model, date and time stamp, and some other information in the EXIF metadata as the watermark information, conventional watermarking techniques can be applied to ordinary pictures taken by ourselves, and watermarked images with good quality can be produced. Even when the marked image has been intentionally modified, the original EXIF with selected information can be recovered from the watermark extraction process. Simulation results present the effectiveness of such an implementation.
Genetic fingerprinting for copyright protection of multicast media
(2009-02-01)
Huang, Hsiang-Cheh
;
Chen, Yueh-Hong
;
交大名義發表
;
National Chiao Tung University
Generally speaking, comparing to the unicast or broadcast methods, it is more efficient to transmit multimedia data via the multicast method to massive users. However, the ease of delivery of multimedia data may cause the copyright of such multimedia to be easily infringed upon, and the fingerprinting scheme is one of effective means for conquering this problem. Fingerprint embedding process often generates the multimedia contents into many different versions, which have to be transmitted via the unicast method. In this paper, we propose a new genetic fingerprinting scheme for copyright protection of multicast video. In this method, the encryption and decryption keys, which aim at scrambling and descrambling multimedia contents, are first produced with genetic algorithms. Next, multimedia data are then encrypted and multicast to all users. At the same time, a secure channel is employed to unicast a designated decryption key to each user. When a user deploys the designated key to decrypt the received data, a corresponding fingerprint would be embedded into the contents. Once upon the reception of the fingerprinted multimedia content, the embedded fingerprint can be extracted shortly, and the copyright can be confirmed and assured. Experimental results demonstrate that the proposed method can transmit multimedia data to clients effectively and cause only a slight degradation in perceptual quality.
Lossless Data Hiding with Multi-Round Difference Prediction
(2014-01-01)
Huang, Hsiang-Cheh
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Lin, Chuan-Chang
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Chen, Yueh-Hong
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Fang, Wai-Chi
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電機工程學系
Lossless data hiding belongs to one major branch in information security researches. The major goal is to retain the lossless property of proposed algorithm, meaning that original image and embedded secret should be perfectly recovered at decoder. Based on the multi-round prediction of differences between original and marked images, enhanced amount of capacity can be obtained while retaining the acceptable quality of output image. Simulation results have demonstrated the better performances over relating methods in literature.
Multicast video fingerprinting scheme with genetic algorithm
(2008)
Huang, Hsiang-Cheh
;
Chen, Yueh-Hong
;
交大名義發表
;
National Chiao Tung University
Comparing to the unicast or broadcast methods, it is more efficient to transmit video data via the multicast method to massive users. However, the ease of delivery of video data may cause a problem to copyright protection, and the fingerprinting scheme is one of effective means for conquering this problem. Fingerprint embedding process often generates the multimedia contents into many different versions, which have to be transmitted via the unicast method. In this paper, we propose a new fingerprinting scheme with the aid of genetic algorithms for copyright protection of multicast video. Experimental results demonstrate that the proposed method can transmit multimedia data to clients effectively and cause only a slight degradation in perceptual quality.
Reversible Data Hiding with Enhanced Difference Alteration for Progressively Transmitted Images
(2013)
Huang, Hsiang-Cheh
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Wang, Ting-Hsuan
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Chen, Yueh-Hong
;
Fang, Wai-Chi
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電子工程學系及電子研究所
Progressive transmission of multimedia is an important application in multimedia communications. We employ reversible data hiding for protecting the copyright of progressively transmitted images. We consider carefully altering the luminance differences between base and enhancement layers in progressive transmission, and obtain similar qualities of output images with enhanced amount of capacity. Simulation results demonstrate the superiority over existing schemes.