Unlock instant, AI-driven research and patent intelligence for your innovation.

Fast single image defogging method based on minimum value channel

A single image, minimum value technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of high computational complexity and inaccurate estimation of local transmittance, and achieve good processing effect and small amount of calculation Effect

Active Publication Date: 2021-08-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of inaccurate estimation of local transmittance and high computational complexity in the existing defogging restoration method, the present invention provides a fast single image defogging method based on the minimum value channel

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 single image defogging method based on minimum value channel
  • Fast single image defogging method based on minimum value channel
  • Fast single image defogging method based on minimum value channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] combine Figure 1 to Figure 4 Describe this embodiment, a fast single image defogging method based on the minimum value channel, the specific implementation process of the method is as follows:

[0025] 1. Atmospheric scattering model:

[0026] At present, the widely used fog imaging model is derived by Narasimhan and Nayar based on McCartney's attenuation model and atmospheric light model. The imaging model based on atmospheric scattering is shown in the following formula:

[0027] I(x)=J(x)t(x)+A(1-t(x)) (1)

[0028] Among them, I(x) is the image of the foggy scene, J(x) is the image of the non-foggy scene, A is the global atmospheric light, and t(x) is the atmospheric transmittance.

[0029] 2. Establishment of transmittance estimation model:

[0030] The minimum value filtering is performed on the local area of ​​formula (1), and the rough estimate of the transmittance can be obtained as:

[0031]

[0032] in, is the minimum value channel image of the foggy...

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 fast single image defogging method based on a minimum value channel, relates to the technical field of digital image processing, and solves the problems of inaccurate local transmittance estimation and high calculation complexity in an existing defogging restoration method. According to the defogging method provided by the invention, a transmittance estimation model is established for a minimum value channel through a foggy image and a fogless image, and a minimum channel of the fogless image is obtained through a quadratic function transformation model, so that a transmittance graph is obtained. Smooth filtering processing is carried out on the transmittance image through guide filtering, the transmittance can be accurately estimated, the algorithm processing effect is good, the calculation amount is small, and the method can be applied to a real-time engineering system.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a fast single image defogging method based on a minimum value channel. Background technique [0002] Visible light imaging systems are affected by fog and haze weather, resulting in serious degradation of image information collected by imaging sensors, which limits the effectiveness of outdoor imaging equipment to a large extent. The application value of the image. How to improve the quality of smog-degraded images and increase the visibility of images is a frontier topic of common concern in the fields of image processing and computer vision, especially the quality improvement of a single image has become a current research hotspot. Currently, solutions to such problems can be generalized as model-free and model-based dehazing methods. Non-model-based methods mainly improve the visual effect of foggy images, such as histogram equalization, gamma correction, an...

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): G06T5/00
CPCG06T5/73G06T5/77G06T5/70
Inventor 毕国玲吕恒毅赵宇宸余达宋向宇
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI