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Anti-counterfeiting method of 3D icons
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A three-dimensional, three-dimensional image technology, applied in the field of information security, can solve the problems of unable to hide image information, no anti-counterfeiting function, unable to three-dimensionally display icons, etc.
Inactive Publication Date: 2010-01-20
TSINGHUA UNIV
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[0012] However, the three-dimensional image technology does not have the anti-counterfeiting function, that is, the image information cannot be hidden
[0013] To sum up, in the prior art, either the information in the icon can only be simply hidden, and the icon cannot be displayed in three dimensions; or the icon can only be displayed in three dimensions, without anti-counterfeiting function, and the icon information cannot be hidden
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Embodiment 1
[0034] This embodiment provides a method for anti-counterfeiting using three-dimensional icons, such as figure 1 As shown, the method combines the visual sharing technology and the three-dimensional drawing technology to generate a three-dimensional visual sharing icon according to the probability of using the visual sharing picture and the probability of using the three-dimensional drawing. This probability can be controlled and change.
[0035] Assume that the probability used in the generated 3D stereoscopic visual sharing icon is p, and the probability used in the 3D stereographic image is q, 0
[0036] When p=100%, when q=0, the generated n visual sharing images are pure (k, n) visual sharing images, and do not have the effect of three-dimensional display; when p=0, q = 100%, the generated n visual sharing images are n three-dimensional display images, which do not have a visual sharing function and cannot hide secret image information.
[0037...
Embodiment 2
[0067] The present embodiment has described the computer program flow that realizes the anti-counterfeiting method utilizing three-dimensional icons. In this example, k=n=2, p=50%, and q=50%. The specific steps are as follows:
[0068] Step 201: Obtain the following basic data;
[0069] 1.(k, n), n refers to the quantity of visible sub-store diagrams, and k refers to the threshold value of the required visual sub-store diagram quantity to restore the dense map, k=n=2 in this example;
[0070] 2. According to (2, 2), according to the existing visual sharing technology, determine the basic matrix B 0 , B 1 , and expansion coefficient m;
[0071] 3. Obtain two grayscale images, and use the grayscale images to represent the height information of the two three-dimensional images, and the color c 1 ,...,c n ∈{0,...,255} is grayscale information, and these images have the same size;
[0072] 4. Select the probability values p=50% and q=50% of using the visual sharing map and u...
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Abstract
An anti-fake method by using a 3D stereoscopic icon pertains to the information security field. The invention discloses the anti-fake method by using the 3D stereoscopic icon, which can show 3D stereoscopic icons and hide the confidential image information in the 3D stereoscopic icons, comprising the following steps of: obtaining parameters, inputting confidential images and grey images; then using a visual divided storage method to build n visual divided storage images, using a 3D stereograph method to build n 3D stereoscopic images, adjusting the sizes of the n visual divided storage images and the n 3D stereoscopic images and dividing the n visual divided storage images and the n 3D stereoscopic images into a plurality of basic blocks; finally random choosing the basic blocks in the corresponding positions in the visual divided storage images or the 3D stereoscopic images to build n 3D stereoscopic and visual divided storage icons, etc. The invention combines the visual divided storage technique with the 3D stereograph technique by the data fusion technique, therefore, each generated icon is a 3D stereograph in which the confidential information is stored dividedly.
Description
technical field [0001] The invention relates to the field of information security, in particular to an anti-counterfeiting method using three-dimensional icons. Background technique [0002] In recent years, with the application of icon anti-counterfeiting technology, the technology in the field of information security has developed rapidly, especially the development of visual sharing technology and three-dimensional image technology, which has further promoted the progress of icon anti-counterfeiting technology. [0003] Visual sharing technology and 3D stereoscopic image technology are both based on the characteristics of human vision, and the process of restoring the image is to use human eye recognition: [0004] 1. Visual sharing technology [0005] Visual sharing technology is a technology that uses human eyes as a decryption tool to share secret images. Its characteristic is that the decryption process does not require complicated calculations, and it directly uses ...
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