Method for reversible image watermarking based on integer-to-integer wavelet transform
AssigneeKorea Advanced Institute of Science and Technology
InventorsChang-Dong Yoo, Sun-Il Lee
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Abstract
Enhanced method for embedding watermarks based on integer-to-integer wavelet transform is provided. The method according to the present invention includes the steps of: (A) dividing an original image (X×Y) to a plurality of image blocks (M×N); (B) selecting image blocks for embedding an location information that indicates image blocks to be watermarked; (C) embedding the location information into the image blocks selected in the step (B); and (D) embedding watermarks into remaining image blocks which are not selected in the step (B).
Claims6
A method for embedding watermarks based on integer-to-integer wavelet transform, the method comprising the steps of:
- (A) dividing an original image (X×Y) to a plurality of image blocks (M×N);
- (B) selecting image blocks for embedding a location information that indicates image blocks to be watermarked;
- (C) embedding the location information into the image blocks selected in the step (B);
- (C-1) creating a matrix (P) whose elements indicate the number of bits that can be shifted in each image block;
- and
- (D) embedding watermark and side information into remaining image blocks which are not selected in the step (B),
- wherein the side information includes the matrix (P) and a set of original LSBs (Bo) replaced during the embedding of the location information.
Dependencies are inferred from the claim text.