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

JND prediction method and device for screen content image, computer equipment and storage medium

A technology of screen content and prediction method, applied in the field of image and video coding

Active Publication Date: 2021-03-02
SHENZHEN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing JND models do not use direction-based weighting factors to precisely adjust edges

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
  • JND prediction method and device for screen content image, computer equipment and storage medium
  • JND prediction method and device for screen content image, computer equipment and storage medium
  • JND prediction method and device for screen content image, computer equipment and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] In order to make the purpose, technical solution and advantages of the present application clearer, the present application 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 application, and are not intended to limit the present application.

[0063] In one embodiment, such as figure 1 As shown, a JND prediction method of a screen content image is provided, the method includes:

[0064] Step 102, acquiring an input image to be predicted;

[0065] Step 104, calculating the spectral residual of the image, and obtaining the uncertainty of each pixel in the image by extracting the order feature of the measured pixels;

[0066] Step 106, dividing the image into predictable content parts and unpredictable content parts according to the uncertainty;

[0067] Step 108, obtaining the JND threshold of the unpredictable...

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 relates to a JND prediction method and device for a screen content image, computer equipment and a storage medium, and the method comprises the steps: calculating the spectral residual error of the image, and obtaining the uncertainty of each pixel in the image through the extraction of the orderliness features of measurement pixels; dividing the image into a predictable content partand an unpredictable content part according to the uncertainty; obtaining a JND threshold value of the unpredictable content part by calculating a contrast masking metric value; obtaining a JND threshold value of the predictable part by calculating brightness contrast masking and fuzzy masking measurement values; and carrying out nonlinear superposition on the JND threshold of the unpredictable content part and the JND threshold of the predictable part, and endowing edge pixels in different directions with different weights according to direction-based weight factors to obtain a final JND threshold of the image. Sensitivity of stimulation in different directions is adjusted by utilizing a human eye vision system, and the method can be used for obtaining a distortion threshold value whichcan be exactly perceived by the whole image.

Description

technical field [0001] The present invention relates to the technical field of image and video coding, in particular to a JND prediction method, device, computer equipment and storage medium for screen content images. Background technique [0002] With the rapid development of Internet technology and multimedia information technology, more and more screen image / video data are generated, which brings great pressure to data compression, transmission and storage. In order to further improve the coding efficiency, it is currently a research hotspot in academia and industry to use the visual characteristics of human eyes to remove visual redundancy in images / videos. Studies based on physiology and psychology have shown that the human visual system has a visual masking effect in the process of image perception, that is, when the change in image pixel value is less than a certain threshold, the human eye cannot perceive any change in pixel value. It is just noticeable distortion (...

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 Applications(China)
IPC IPC(8): H04N19/154H04N19/132H04N19/149H04N19/182
CPCH04N19/154H04N19/132H04N19/149H04N19/182
Inventor 王妙辉刘雪芹
Owner SHENZHEN 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