Clearness processing method for defocus blurred image

A technology of defocus blur and processing method, which is applied in image data processing, image enhancement, instruments, etc., and can solve the problems of limited recovery ability of optical defocus blur

Inactive Publication Date: 2009-02-11
XIAN UNIV OF TECH
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing defocus blur recovery and clearing techniques are based on fixed-radius disc function model...

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
  • Clearness processing method for defocus blurred image
  • Clearness processing method for defocus blurred image
  • Clearness processing method for defocus blurred image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] The present invention proposes a recovery method under variable-radius disc function, which is based on the basic imaging principle of defocused blurred images, constructs degenerated blur model disc functions with different radii, decomposes the blurred image into multiple sub-images, and calculates each sub-image The image is respectively searched for the best blur radius through an iterative method, and the frequency domain inverse filtering method is used to inverse filter the defocused blurred sub-image, so as to achieve the purpose of recovering a clear image.

[0023] The clearing processing method of the defocused blurred image of the present invention is implemented according to the following steps:

[0024] Step 1: Establish a mathematical model based on the degradation principle of defocused blurred images

[0025] figure ...

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 defocus blurred image sharpness processing method, which is implemented according to the following steps: firstly, the mean value and the variance of the edge width is calculated according to gradient information of an image; an initial parameter of a fuzzy model is obtained according to the statistical data; secondly, the blurred image is divided into concentric circles around the center of the image and is broken down into sub-images, wherein, the number of the concentric circles is k and the number of the sub-images is k+1; the corresponding blurred initial semidiameters are distributed to the sub-images; the optimal blurred semidiameter is found through an iterative mode, and the sharpness processing of all sub-images is performed by adopting a frequency domain inverse-filtering manner; finally, all the sub-images are added to synthesize the whole sharpness image. The defocus blurred image sharpness processing method overcomes the limitations in the existing circular disc function modeling recovery method based on the fixed semidiameter, and serves the purpose for restoring the sharp image.

Description

technical field [0001] The invention belongs to the technical field of digital image restoration, and relates to a method for clearing defocused blurred images. Background technique [0002] When taking a photo, sometimes the image will be blurred, which is mainly caused by the fact that the object to be photographed is not on the focal plane of the imaging system, which is called defocus blur. For some photos containing important information, which cannot be recognized due to defocus blur, if there is no chance to shoot again, or the cost of taking another shot is too high, you can use the defocus blur restoration and clearing technology to clear them . Most of the existing defocus blur restoration and clearing techniques are based on fixed-radius disk function modeling restoration methods, which have extremely limited ability to restore optical defocus blur generated in practice. Contents of the invention [0003] The purpose of the present invention is to provide a me...

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): G06T5/00G06T5/10
Inventor 朱虹金欢徐骁斐王栋王翔
Owner XIAN UNIV OF TECH
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