Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Image encryption method based on two-dimensional compressive sensing and chaotic system

A chaotic system and two-dimensional compression technology, applied in the field of information security, can solve problems such as low reconstruction accuracy, fast reconstruction speed, poor noise resistance, etc., and achieve small key consumption, good robustness, and noise resistance interference effect

Inactive Publication Date: 2018-05-01
NANCHANG UNIV
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantage is faster reconstruction speed, but its disadvantages are lower reconstruction accuracy and poor anti-noise ability

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
  • Image encryption method based on two-dimensional compressive sensing and chaotic system
  • Image encryption method based on two-dimensional compressive sensing and chaotic system
  • Image encryption method based on two-dimensional compressive sensing and chaotic system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention will be further described below in conjunction with the embodiments and drawings, but the protection scope of the present invention should not be limited thereby.

[0040] This implementation scheme is divided into two steps: the first step is based on the generation of the measurement matrix controlled by the chaotic system to realize the measurement encryption to obtain the measured value; the second step is to implement scrambling and diffusion controlled by the chaotic system according to the ring range to obtain the ciphertext. The specific steps of this embodiment are as follows:

[0041] Step 1: Select the discrete symlet8 wavelet to construct the sparse basis Ψ, and perform two-dimensional discrete wavelet sparse on the image I(x, y) with a size of N×N, and obtain

[0042] A=Ψ T I(x,y) T Ψ (11)

[0043] Take the initial value of x 01 ,y 01 The two-dimensional sine-logistic chaotic map of the following iterations

[0044]

[0045] Amo...

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

An image compression encryption algorithm based on two-dimensional compressed sensing and chaotic system. Use the wavelet sparse base to perform sparse representation of the image to generate a sparse matrix, then use the random sequence generated by the two-dimensional sine-logistic chaotic system to iteratively generate a measurement matrix, and use this matrix to compress the sparse matrix to obtain a preliminary compression Encrypted images, i.e. intermediate results. In order to enhance the system's ability to resist attacks, the chaotic series generated by the chaotic system is used to perform pixel scrambling and cyclic shift operations on the intermediate results to obtain the final encrypted image. The present invention uses a two-dimensional sine-logistic chaotic system, which increases the randomness of the sequence and enhances the effect of scrambling images. The invention expands the key space, increases the security of the encryption system, avoids excessive ciphertext data, and achieves better encryption effect.

Description

technical field [0001] The invention belongs to the technical field of information security and relates to image encryption and image compression technologies. Background technique [0002] With the rapid development of the Internet, more and more images need to be transmitted on the network, which has made image security issues increasingly prominent. Therefore, when storing or transmitting important images, in order to ensure the security of important images, it is necessary to utilize effective image encryption technology. Image encryption generally makes the original image information into information similar to random noise through operations such as scrambling and diffusion. Therefore, these encrypted information are unrecognizable to network eavesdroppers whose keys are unknown, and can be used by authorized parties. The key and the decryption method decrypt the ciphertext to obtain the decrypted image, thereby effectively protecting the image information in transmis...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00G06T9/00
Inventor 周南润杨建平龚黎华谢新文
Owner NANCHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com