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Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/1955
Title: A data hiding technique in JPEG compressed domain
Authors: Wong, Hon Wah
Au, Oscar C.
Wong, Wai Chuen
Keywords: J-Mark
Data hiding technique
JPEG compressed domain
Image coding
Discrete cosine transforms
Issue Date: Jan-2001
Citation: Security and Watermarking of Multimedia Contents III, Ping Wah Wong, Edward J. Delp III, Editors, Proceedings of SPIE Vol. 4314, p. 309-20 (2001)
Abstract: JPEG is a common image format in the world wide web. JPEG-compressed images can be used to hide data for secret internet communication and simply any auxiliary data. In this paper, we propose an algorithm called J-Mark to embed invisible watermark information into JPEG compressed images in the compress domain. There are three parts of J-Mark: block selection, DCT coefficient selection, and modification of selected DCT coefficients. Only the texture blocks with significant masking properties are selected in block selection. Only the DCT coefficients with significant energy in the selected blocks are selected. The watermark data are embedded as the 'randomized parity' in the selected DCT coefficients. The embedded data can be recovered perfectly in the compressed domain without fully decoding the JPEG image. Experiment results suggest that the proposed J-Mark can hide the watermaking data without detectable visual artifacts. Although the data hiding capacity differs among images, some parameter of J-Mark can be used to achieve tradeoff between data hiding capacity and visual quality.
Rights: Copyright 2001 Society of Photo-Optical Instrumentation Engineers. This paper was published in Security and Watermarking of Multimedia Contents III, Ping Wah Wong, Edward J. Delp III, Editors, Proceedings of SPIE Vol. 4314, p. 309-20 (2001) and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
URI: http://hdl.handle.net/1783.1/1955
Appears in Collections:ECE Conference Papers

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