Image analysis – Applications
Reexamination Certificate
2006-04-10
2009-11-03
Azarian, Seyed (Department: 2624)
Image analysis
Applications
C382S251000, C380S200000
Reexamination Certificate
active
07613319
ABSTRACT:
An electronic watermark generating apparatus color-converts an RGB image, and divides the color-converted image into a plurality of blocks. Then, the apparatus embeds to-be-embedded information as an electronic watermark into blocks in which an irreversible compression image has been quantized, the image being produced by carrying out quantization on a block-by-block basis, and restores the RGB image by carrying out de-quantization with respect to the blocks. The above apparatus color-converts the restored RGB image, and divides the color-converted image into a plurality of blocks. Thereafter, the apparatus carries out quantization on a block-by-block basis, and extracts to-be-embedded information from the thus quantized blocks. The apparatus embeds the to-be-embedded information as an electronic watermark again in the quantized blocks when it is not checked that the to-be-embedded information has been correctly extracted.
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Siozaki Hirosi, Journal of the Institute of Image Electronic Engineers of Japan, vol. 31, No. 4, 2002 (pp. 616-622).
Kunieda Shigetoshi
Narahashi Masaki
Sano Kouichi
Watanabe Naoki
Azarian Seyed
Harness & Dickey & Pierce P.L.C.
Toshiba Tec Kabushiki Kaisha
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