標題: Data hiding in images via multiple-based number conversion and lossy compression
作者: Wu, DC
Tsai, WH
資訊工程學系
Department of Computer Science
關鍵字: data hiding;lossy compression;stego-image;security;multiple-based number system;multiple-based number conversion;tolerable error range
公開日期: 1-Nov-1998
摘要: A novel and easy method to embed any form of secret messages into a cover image with controlled distortion is proposed. Any lossy image compressor may be applied first to a cover image to produce a lossily-processed result as the basis for embedding data in the cover image. The stego-image is produced by embedding data in each pixel of a cover image by changing its gray value without excessing the range of the gray value difference of the corresponding pixels of the cover image and its lossily-processed one. The quantity of distortion that is caused by embedding data is never in excess of that is caused by the lossy compressor. A multiple-based number system is proposed to convert the information in the secret bit stream into values to be embedded in the choosing pixels of the cover image. Pseudo-random mechanisms may be used to achieve cryptography. It is found from experiments that the values of the peaks of the signal-to-noise ratio of the stego-images are larger than those yielded by the chosen compressor, which means that the distortion in the embedding result is more imperceptible than that in the compressed one.
URI: http://dx.doi.org/10.1109/30.735844
http://hdl.handle.net/11536/31778
ISSN: 0098-3063
DOI: 10.1109/30.735844
期刊: IEEE TRANSACTIONS ON CONSUMER ELECTRONICS
Volume: 44
Issue: 4
起始頁: 1406
結束頁: 1412
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