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- W2375471249 abstract "Knowledge on character normalization and wavelet transform is proposed that divide a document image into character image and normalize these character images,and embeds a random sequence watermarks into a lower frequency subband based on the wavelet coefficient distribution.By exploiting and depending on the feature of visual masking of human vision system,watermark components with different strength are embedded into different wavelet coefficients.Because division of document image and normalization of cha-racter image have a feacture against geometric distortion,this watermarking algorithm is more robust to ageometric distortions.The ex-periment prove that this algorithm is superior to other algorithm in document images." @default.
- W2375471249 created "2016-06-24" @default.
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- W2375471249 date "2007-01-01" @default.
- W2375471249 modified "2023-09-28" @default.
- W2375471249 title "Document image watermarking based on character normalization" @default.
- W2375471249 hasPublicationYear "2007" @default.
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