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

Fast Adaptive Loop Filtering Method Based on Just Perceptible Distortion Model

An adaptive loop and distortion model technology, applied in the field of video coding, to improve coding efficiency and reduce complexity

Active Publication Date: 2019-02-01
SHANGHAI UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on adaptive loop filtering is a hot spot in video coding at home and abroad, but few scholars consider the visual characteristics of the human eye when reducing the complexity of the filter, so this invention is undoubtedly of great significance

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
  • Fast Adaptive Loop Filtering Method Based on Just Perceptible Distortion Model
  • Fast Adaptive Loop Filtering Method Based on Just Perceptible Distortion Model
  • Fast Adaptive Loop Filtering Method Based on Just Perceptible Distortion Model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] Such as figure 1 As shown, a fast adaptive loop filtering method based on just perceptible distortion model, including the following steps:

[0049] Step 1: Create a JND model:

[0050] JND(x,y)=T l (x,y)+T t (x,y)-C l,t min{T l (x,y),T t (x,y)} (4)

[0051] (1) In the formula, T l (x, y) represents the minimum perceptible threshold generated by the brightness masking effect of the area where the pixel I(x, y) is located, and its calculation method is:

[0052]

[0053] (2) In the formula, Indicates the average background brightness value of the 5x5 window around the pixel I(x,y), and its calculation method is:

[0054]

[0055] In formula (3), B(i, j) is a 5x5 low-pass filter:

[0056]

[0057] (1) In the formula, T t (x, y) represents the minimum perceptible threshold generated by the contrast masking effect of the area where the pixel I(x, y) is located, and its calculation method is:

[0058] T t (x, y) = η·G(x, y)·We(x, y) (5)

[0059] In th...

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 fast adaptive loop filter algorithm based on a just noticeable distortion (JND) model, which comprises the steps of establishing a JND model, dividing image frames into a region-of-interest (ROI) and a region-of-non-interest (RONI) by using the JND model, dividing the RONI into a region-of-non-interest smooth region (RONISR) and a region-of-non-interest texture region (RONITR) by using a Canny operator, and dividing the ROI into a region-of-interest smooth region (ROISR) and a region-of-interest texture region (ROITR) by using the Canny operator; and carrying out adaptive filtering. According to the invention, an ALF (adaptive loop filter) method is optimized in allusion to an HEVC (high efficiency video coding) structure by being combined with the pixel-domain JND model and the Canny operator, perceptive redundancy in video is removed, and the coding efficiency is improved; and a region which does not need ALF processing can be found out quickly, and the complexity of the adaptive loop filter algorithm is greatly reduced under the condition of not influencing the quality.

Description

technical field [0001] The invention relates to a fast adaptive loop filtering method, in particular to a fast adaptive loop filtering method based on a just perceivable distortion model, and belongs to the technical field of video coding. Background technique [0002] With the continuous development of society, a large amount of information is also transmitted to humans, and about 70% of the information extracted by humans comes from vision. Therefore, people's requirements for video quality will be in the first place, because the ultimate purpose of video is to serve the human eye. However, the existing network bandwidth cannot meet the real-time transmission of high-definition video signals. Therefore, video coding and compression technology has a significant impact on the development of video communication. In order to obtain higher compression efficiency and support HD / UHD video compression, the two international standardization organizations ISO / IEC and ITU-T establis...

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): H04N19/82H04N19/86H04N19/154
Inventor 王永芳王宇兵石亚文罗丽冬张兆杨
Owner SHANGHAI 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