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Method for balancing image privacy and availability based on three-pixel point encryption

A three-pixel, privacy technology, applied in the field of balancing image privacy and usability, can solve problems such as difficulties, achieve the effect of enhancing connectivity and solving the incompatibility between privacy and usability

Active Publication Date: 2021-08-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Encrypting the entire image and obtaining image information through features or annotations seems to be feasible, but it is difficult to distinguish images by browsing textual information
It can be seen that there are some problems in the existing methods of balancing image privacy and usability in the cloud.

Method used

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  • Method for balancing image privacy and availability based on three-pixel point encryption
  • Method for balancing image privacy and availability based on three-pixel point encryption
  • Method for balancing image privacy and availability based on three-pixel point encryption

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Embodiment Construction

[0068] The present invention will be further described below in conjunction with the accompanying drawings.

[0069] The present invention provides a method for balancing image privacy and usability based on three-pixel encryption, including an encryption step and a decryption step, specifically including the following steps:

[0070] Step 1: If figure 1 As shown, the encryption process is as follows:

[0071] (1.1) Original block segmentation:

[0072] Obtain the parameters of the input image, divide the image into three channels of R, G, and B, and each channel is divided into multiple pixel blocks of b*b size according to the preset block dimension b.

[0073] (1.2) Encryption based on pixel blocks, specifically as figure 2 Shown:

[0074] Divide the pixels in each block into a pixel group every three according to the preset rules, then calculate the sum s of the pixel values ​​in the pixel group, generate the corresponding domain based on s, and calculate the correspo...

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Abstract

The invention discloses a method for balancing image privacy and availability based on three-pixel point encryption, which comprises the following steps of: segmenting an image into a plurality of pixel blocks, grouping pixels in each pixel block, and taking every three pixels as one group; after the sum s of pixel values in the pixel groups is solved, generating a domain by utilizing the s, numbering all the pixel groups in the domain, and then solving the serial number SN of the original pixel group by utilizing a ranks function; generating a random number by using the secret key, and subjecting the random number and the SN to addition and then complementation, that is the encrypted SN, namely SNen, is generated; solving a pixel group corresponding to the SNen in the domain by using a function; and scrambling and encrypting all the pixels in the pixel block. According to the method, the accurate thumbnail of the original image can be kept in the ciphertext image, so that an image owner can obtain availability by utilizing visual information of the ciphertext image.

Description

technical field [0001] The invention belongs to the fields of privacy protection and image encryption, in particular to a method for balancing image privacy and usability based on three-pixel encryption. Background technique [0002] With the continuous maturity of digital imaging technology, people have become accustomed to using electronic equipment instead of traditional film cameras to capture images. This has brought many benefits, such as the low cost of taking images and what you see is what you get, making it easier than ever for ordinary people to take images at will. These images record our daily life. Although they allow us to recall the moments that have happened at any time, they undoubtedly record people's privacy, such as location, religious belief, and interpersonal relationship. Illegal third parties may further use these private information to conduct privacy reasoning on the owner of the image, or directly use these images for AI model training, making ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/44H04L9/08
CPCH04N1/4486H04L9/0869
Inventor 赵若宇张玉书
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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