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Method for processing an unauthorized revealing function with documents, and a method for performing a validation of the unauthorized function with documents revealed
Method for processing an unauthorized revealing function with documents, and a method for performing a validation of the unauthorized function with documents revealed
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机译:用于处理带有文件的未经授权的泄露功能的方法以及用于验证带有文件的未经授权的泄露功能的方法
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摘要
An anti-tampering method for processing documents is disclosed. The method comprises, in regard to an encoding step, the steps of resolving (in a step 2303) in regard to an N-level image to be recorded, a pixel of the image into a major component having N possible values, selecting (in the step 2303) a pattern element depending upon the major component and the position of the pixel in the image, and recording the selected pattern element (in a step 2308) onto a transfer medium. In regard to a corresponding decoding step the method comprises extracting (in a step 2405) from the recorded document, a retrieved pattern element for said pixel, determining a pattern element (in a step 2407) depending upon a major component extracted from the retrieved pattern element and the position of the pixel on the recorded document, and comparing (in a step 2409) the retrieved pattern element and the said determined pattern element.
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