Digital image encrypting and decrypting method

An encryption method and digital image technology, applied in the field of image processing, can solve problems such as uncontrollable encryption and poor image quality

Inactive Publication Date: 2012-07-25
AEROSPACE SCI & IND SHENZHEN GROUP
View PDF1 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a digital image encryption and decryption method for the defects of uncontrollable encryption and poor image quality

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Digital image encrypting and decrypting method
  • Digital image encrypting and decrypting method
  • Digital image encrypting and decrypting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0055] see figure 1 , figure 1 It is a flow chart of the digital image encryption method of the present invention, as figure 1 As shown, the encryption method includes the following steps:

[0056] In step A1, specify the gray value range of the encrypted image according to the image to be encrypted, assuming that the gray value range is [ V min, V max], it should be noted that the gray value range can generally be selected according to the needs of users. In this embodiment, the gray value range is [30,225], which should be understood by those skilled in the art, and will not be repeated here....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a digital image encrypting and decrypting method comprising the following steps of: appointing the gray value range of an encrypted image according to an image to be encrypted; dividing the image to be encrypted into pixel blocks with the same size, and computing a pixel mean value by virtue of a formula; generating a sub-secret key according a 48-bit binary system key stream preset by a user, and building Logistic mapping according to the pixel mean value; converting into a binary sequence according to the number of floating points generated by the Logistic mapping, and taking the binary sequence as the sub-secret key of the next pixel block; scrambling the pixel in each pixel block based on the improved Arnold conversion, and combining the scrambled pixel blocks into a matrix; and replacing the adjoining pixels in the matrix, so that a ciphertext image can be formed. According to the requirement of a user, the image can be encrypted by means of different numbers of sheaves, various filtering attacks can be resisted, and the invariability of the pixel mean value of the image can be realized, so that the whole style and feature of the original image can be maintained.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a digital image encryption and decryption method. Background technique [0002] With the continuous development of the Internet and communication technology, digital images, as the most intuitive, vivid and vivid information carriers, are used more and more widely in daily life, and gradually become a mainstream way of expressing network information. , not subject to geographical restrictions, and the cost is very low and the efficiency is high. The sales model of traditional photo dealers has also gradually changed to an e-commerce model. Under this commercial background, in order to solve the problem that customers can preview the basic information of the picture before deciding whether to buy a digital picture, a digital image selection encryption mode is proposed. Although the selected encrypted image still retains its main content, but Visually, it is rougher than the origi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06T1/00
Inventor 耿桂华
Owner AEROSPACE SCI & IND SHENZHEN GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap