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

A real-time image dehazing method based on image depth of field

A real-time image and image technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as time-consuming, large amount of calculation, and limit wide application, so as to reduce the number of minimum value comparisons and calculation amount, and improve real-time The effect of enhancing local contrast and global contrast

Active Publication Date: 2016-08-17
NANJING 55TH INSTION TECH DEV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method performs minimum value filtering on each pixel to calculate the dark channel image, so as to estimate the atmospheric parameters and transmittance, and then restore the haze-free image according to the imaging model. The image takes a lot of time and it is difficult to meet the real-time requirements, which limits the wide application of the algorithm in the engineering field
In addition, for foggy scenes with continuous depth of field, the contrast stretching algorithm can be used to achieve the defog effect. With the help of a reference image of a sunny day and a foggy scene, the depth ratio relationship of each point in the scene is calculated, and finally the depth relationship is used. Restore foggy images, but this method requires multiple images of the same scene, which cannot meet the needs of real-time image dehazing

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
  • A real-time image dehazing method based on image depth of field
  • A real-time image dehazing method based on image depth of field
  • A real-time image dehazing method based on image depth of field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Such as figure 1 As shown, the real-time image defogging method based on image depth of field of the present invention comprises the following steps:

[0028] Step 1, read the foggy image I(x, y), where x and y represent the abscissa and ordinate of each pixel in the image, assuming that the height of the image is h pixels, and the width is w pixels, if the If the foggy image I(x,y) is a color image, the minimum value of each pixel R, G, and B channel in the foggy image I(x,y) is assigned to each pixel's R, G, and B channels , the grayscale image of the foggy image I(x,y) is obtained as I g (x, y), if the foggy image I(x, y) is a grayscale image, then the grayscale image will take the image, that is, I g (x,y)=I(x,y);

[0029] Step 2, based on the dark primary color principle, the grayscale image I g All pixels of (x, y) are divided into several square areas Ω of N*N pixels, if the grayscale image I g The side length of (x, y) is not an integer multiple of the side...

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 provides a real-time image defogging method based on the image field depth. Firstly, gray level image processing is carried out on a foggy image; secondly, the gray level image is divided, the dark primary color image is calculated in a minimum value mode, the atmosphere light value is estimated, a rough atmosphere dissipation image and a field depth mask are calculated; thirdly, edge-feathered masks and enhanced images with different field depths are calculated; lastly, fusing is carried out, and a defogged image is obtained. According to the method, when a single image is processed, the field depth information is added into an image contrast increasing method, an image layer fusing method is adopted, parallel computing can be carried out, the real-time performance is high, and the defogging effect is obvious.

Description

technical field [0001] The invention relates to a digital image processing method, in particular to a real-time image defogging processing method. Background technique [0002] In fog, haze and other weather conditions, the scattering effect of a large number of tiny water droplets and aerosols suspended in the atmosphere will seriously degrade video images, which greatly limits and affects the functions of outdoor systems such as urban traffic, video surveillance, and smart vehicles. Therefore, it is necessary to dehaze the degraded image and restore the real scene image. For applications such as video surveillance, the efficiency and real-time performance of defogging processing are crucial. [0003] The current methods of fog image processing can be roughly divided into two categories: one is based on image enhancement methods, which do not consider the specific formation process of fog images, but only select the interesting part of the image for enhancement. Commonly ...

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): G06T5/40
Inventor 宋文丁进孟明
Owner NANJING 55TH INSTION TECH DEV
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