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Digital image watermarking approach based on lapped orthogonal transform

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4 Author(s)
Feng-Hsing Wang ; Sch. of Electr. & Inf. Eng., South Australia Univ., The Levels, SA, Australia ; Jeng-Shyang Pan ; Jain, L.C. ; Hsiang-Cheh Huang

A new watermarking approach based on lapped orthogonal transform (LOT) is proposed. It provides better imperceptibility by reducing the blocking effects which exist in most block-based image coding transforms like JPEG. The proposed scheme performs the LOT to the cover image, modifies the LOT coefficients to hide the watermark bits according to the given user-key, and executes the inverse LOT to generate a watermarked image. It requires no original cover image to be introduced during extraction, and it has strong robustness under the JPEG attacks.

Published in:

Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on  (Volume:2 )

Date of Conference:

6-9 Dec. 2004