Method for embedding information on upper printed medium
A technology for printing media and information data, applied in the field of information processing, can solve the problems of large amount of embedded information, illegal copying of printed documents, low destructiveness of identification accuracy and information quality, etc., and achieve the effect of large amount of embedded information
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[0056] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are illustrative rather than limiting.
[0057] exist figure 1 Examples of AM screen dots, frequency modulation FM screen dots, error diffusion screen dots and 10,000-line screen dots are given in . figure 1 (a) is the AM screen dot legend, figure 1 (b) is the legend of FM screen dots, figure 1 (c) is the legend of error diffusion type screen dots, figure 1 (d) is the legend of ten-thousand-line screen dots. Among them, 101 is a dot, which is the smallest unit of printing, and 102 is a dot printed with ink. The so-called pixel is the smallest unit that constitutes an image, and the so-called dot is the smallest unit of the screen corresponding to the pixel that constitutes the smallest unit of an image, and a dot is composed of dots. exist figure 1 The AM type screen given in (a) expresses the intensit...
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