A Security Method for Multi-viewpoint Images

A technology of multi-viewpoint image and security method, which is applied in the field of security of multi-viewpoint image, can solve the problems of low degree of confusion and easy cracking, and achieve the effect of high degree of confusion, good confidentiality performance and improved security

Active Publication Date: 2018-10-02
上海云视科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this approach is that the degree of confusion is not high and it is easy to crack

Method used

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  • A Security Method for Multi-viewpoint Images
  • A Security Method for Multi-viewpoint Images
  • A Security Method for Multi-viewpoint Images

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A security method for a multi-viewpoint image, which comprises the following steps:

[0031] 1) The original multi-view image is attached figure 1 As shown, there are 16 pixel units in total. The confusion end converts 50% of the RGB pixel units in the original multi-viewpoint image into YCbCr pixel units. figure 1 The 8 RGB pixel units 1, 2, 5, 7, 11, 12, 14, and 16 are converted into YcbCr pixel units, and each RGB pixel unit or YCbCr pixel unit is decomposed into three sub-pixels to form a transition image. image attached figure 2 As shown, the pixel conversion information is stored;

[0032] 2) Each pixel unit sub-pixel in the transition image is mapped by a position random number array to generate a new confused pixel image; at this time, the position random number array mapping uses a beta distribution random number generator to generate a number corresponding to each sub-pixel, and then According to the generated numbers, rearrange from small to large, that i...

Embodiment 2

[0037] Other steps are as embodiment 1, and the difference is: 10 pixel units in the 16 pixel units of the original image are first converted from RGB to YcbCr, and the chi-square distribution random number generator is used to generate random numbers corresponding to the pixel units of the transition image, And arrange and confuse according to the generated random numbers from large to small.

Embodiment 3

[0039] Other steps are as embodiment 1, the difference is:

[0040] Step 2) Use the beta distribution random number generator to generate 6 groups of random numbers. A hidden control word is added to the first line of the multi-viewpoint image in the first frame of the video to control the multi-viewpoint image of the current video to select one of the random number arrays for mapping and inverse mapping.

[0041] Assuming that the actual screen has n lines, this method needs to sacrifice the first line of the first frame image for use as control information, and the effective pixel lines are n-1 lines.

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Abstract

The invention relates to the field of 3D display technologies, and in particular relates to and discloses a security method for a multi-view image. The method comprises the following steps of converting a part of RGB pixel units in the original multi-view image into YCbCr to form a transition image; performing location random number array mapping on each sub-pixel in the transition image to generate a mixed pixel image; when the image is playing, recovering the mixed pixel image, wherein the transition image is recovered by a recovery terminal in a previous location random number array mapping manner; and converting the YCbCr pixel units in the transition image into the RGB pixel units according to previous pixel conversion information, combining the RGB pixel units to acquire the original multi-view image. According to the security method for the multi-view image provided by the invention, the part of the RGB pixel units are converted into the YCbCr pixel units, and each sub-pixel is independently subjected to random dynamic location mixing, so that the security method has the advantages of being high in mixing degree, difficult to break and good in security performance, and greatly improves the data transmission security of the multi-view image.

Description

technical field [0001] The invention relates to the technical field of 3D display, in particular to a multi-view image security method. Background technique [0002] 3D display technology is becoming more and more common in people's lives. The existing 3D effects on the market are mainly divided into two types. One is to use external tools, such as 3D glasses, to get a 3D sense, and the other is to watch directly with naked eyes. . However, no matter which of the above-mentioned solutions requires the use of a 3D display device and a converted 3D signal, only when the 3D signal matches the 3D display device can the 3D effect be realized and a perfect 3D effect be achieved. [0003] The existing signal is composed of images arranged frame by frame, and each frame of image needs to be converted into a multi-viewpoint image, and the converted multi-viewpoint image needs to be sent to a 3D display device. In this field, once a 3D display device is launched on the market, it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N13/15H04N13/194H04N21/2347
CPCH04N13/15H04N13/194H04N21/2347
Inventor 张毅军
Owner 上海云视科技股份有限公司
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