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

Method and device for enhancing low-light image

A low-light, image-based technology, applied in the field of image processing, can solve problems such as increasing noise and producing halos

Inactive Publication Date: 2019-01-22
PEKING UNIV
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a low-light image enhancement method and device, which solves the technical problem that the image enhancement method based on retinal technology in the prior art will increase potential noise and the result of image enhancement will produce halos

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
  • Method and device for enhancing low-light image
  • Method and device for enhancing low-light image
  • Method and device for enhancing low-light image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] It should be understood that the term "and / or" used herein is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and / or B, which may mean that A exists alone, and A and B exist simultaneously. B, there are three situations of B alone. In addition, the chara...

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 method and a device for enhancing a low-illumination image. The method comprises the following steps of: calculating an enhancement gradient of at least one channel image of an original image; establishing an objective function for solving a luminance component and a reflection component with respect to at least one channel image; Solving an objective function of at leastone channel image to obtain a luminance component and a reflection component of the at least one channel image; Calculating at least one channel enhanced image based on a luminance component and a reflection component of the at least one channel image; synthesizing the enhanced images of each channel, or synthesizing the enhanced images of one channel with the original images of other channels toform the enhanced low-light images. Since the reflection component and the luminance component are not solved in the logarithmic domain in the objective function, the noise in the image is effectivelysuppressed, and a 1-norm constraint is performed when the gradient of the luminance component is constrained, so that the halo phenomenon in the image enhancement result can be effectively avoided.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of image processing, and in particular, to a method and device for enhancing a low-light image. Background technique [0002] Low-light images refer to images captured under low-light conditions, which usually contain different degradation phenomena. Examples include poor visibility, low contrast, and high noise. Although professional equipment and advanced photography skills can reduce these degradations to a certain extent, noise in low-light conditions is inevitable and currently cannot be solved at the hardware level. Therefore, for ordinary consumers, it is very critical and practical to enhance low-light images with denoising effects through software means. [0003] In the prior art, the method based on retinal technology has a better effect for enhancing low-light images. It assumes that the image can be split into two components, reflectance and luminance. The single-retina ...

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): G06T5/00
CPCG06T5/92G06T5/70
Inventor 李马丁刘家瑛杨文瀚郭宗明
Owner PEKING 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