Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Low-bit compressed image deblocking method based on visual sensitivity and spatial filtering

A technology of spatial filtering and deblocking effect, applied in the field of image processing, can solve problems such as block effect distortion

Inactive Publication Date: 2014-07-02
THE FIRST RES INST OF MIN OF PUBLIC SECURITY +1
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of block effect distortion in low bit rate compressed images by adopting a deblocking method based on the combination of visual sensitivity and spatial filtering for low bit rate JPEG compressed images

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
  • Low-bit compressed image deblocking method based on visual sensitivity and spatial filtering
  • Low-bit compressed image deblocking method based on visual sensitivity and spatial filtering
  • Low-bit compressed image deblocking method based on visual sensitivity and spatial filtering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] Such as Figure 1 to Figure 5 As shown, a kind of low-bit compressed image deblocking effect method based on visual sensitivity and spatial filtering of the present invention, the method comprises the following steps:

[0051] The first step: divide the input distorted image into flat area, edge area and texture area according to the visual sensitivity characteristics;

[0052] Step 2: Select the Sobel operator to extract the gradient information of the image pixels. After calculating the gradient value of the entire image, use three component models, set the threshold, and divide the image into edge area, texture area and flat area. area;

[0053] Step 3: Divide the three areas of the distorted image into 8×8 blocks, and the distorted image area is further divided into flat blocks, edge blocks, and texture blocks; the block type is determined by the texture corresponding to the most texture pixels in the block type decision;

[0054] Step 4: According to the type of...

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 low-bit compressed image deblocking method based on visual sensitivity and spatial filtering. The method includes the steps that an input distorted image is divided into a flat region, an edge region and a texture region according to visual sensitivity characteristics; then a Sobel operator is selected to extract gradient information of pixels of the image, a threshold value is set to enable the image to be divided into an edge region, a texture region and a flat region; the image is further divided into flat blocks, edge blocks and texture blocks; filtering is conducted on the blocks in different filtering modes, and finally block information obtained after filtering is integrated to obtain a processed image. According to the method, the human eye visual sensitivity characteristics are applied to classification of compressed distorted image texture, and the blocking effect in the image is subdivided into six types according to the neighboring relation of the texture blocks. The classification method is simple and effective, an appropriate filter can be selected specifically and easily to perform filtering processing on the blocking effect.

Description

technical field [0001] The invention relates to the technical field of image processing methods, in particular to a low-bit compressed image deblocking method based on visual sensitivity and spatial filtering. Background technique [0002] At present, digital multimedia technology is developing rapidly. In order to meet the needs of digital images in the process of transmission and storage, images are usually compressed. Compression coding standards such as JPEG, MPEG, H.261, H.263 based on block DCT transform are widely used in various aspects of multimedia technology. However, when the coding method based on block DCT transform is at a low bit rate, the decompressed image will produce serious block effect distortion, and the lower the bit rate of the image, the more obvious the block effect is, and the block effect distortion has a great impact on the subjective and objective quality of the image. It has caused a serious impact, causing the image not only to fail to meet ...

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): H04N19/174H04N19/137
Inventor 赵士伟李胜广谭林王俊修王月明
Owner THE FIRST RES INST OF MIN OF PUBLIC SECURITY
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
Eureka Blog
Learn More
PatSnap group products