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

Lens shading compensation method and device, storage medium, and terminal

A technology of lens shadow and compensation method, which is applied in the field of image processing and can solve the problems of magnifying image noise and deteriorating image effect.

Active Publication Date: 2022-04-22
SPREADTRUM COMM (SHANGHAI) CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is how to increase the brightness of the surrounding area of ​​the original image while avoiding image noise from being amplified in a dark environment, resulting in poor image effects

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
  • Lens shading compensation method and device, storage medium, and terminal
  • Lens shading compensation method and device, storage medium, and terminal
  • Lens shading compensation method and device, storage medium, and terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] As mentioned in the background technology, when the existing technology is used to perform lens shading compensation processing on the original image in a dark environment, the noise in the image will be amplified while the effective image signal is amplified, which will make the image effect worse .

[0039] Taking the fishnet method as an example, the specific operation of this method includes the calibration phase and the operation phase.

[0040] In the calibration stage, an image is taken against the gray card in a standard light box with uniform brightness. The original image obtained is an image with a bright center and gradually darkened surroundings. Then the original image is input to the LSC correction coefficient calculation module to obtain the LSC compensation coefficient. The output LSC compensation coefficient is a fishnet-like two-dimensional compensation coefficient table with a size of M×N. Wherein, M×N may be smaller than the size of the original i...

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

A lens shading compensation method and device, a storage medium, and a terminal, the method comprising: acquiring an original image and an initial LSC compensation coefficient; acquiring the ambient brightness when the original image was collected; adjusting the initial LSC compensation according to the ambient brightness coefficient, to obtain the adjusted LSC compensation coefficient, wherein the lower the ambient brightness, the greater the compression range of the adjusted LSC compensation coefficient compared with the initial LSC compensation coefficient; according to the adjusted LSC compensation coefficient, the original The image is subjected to lens shading compensation processing to obtain a processed image. The solution of the present invention can dynamically and adaptively adjust the lens shading compensation degree of the original image according to the ambient brightness, so as to appropriately increase the brightness of the surrounding area of ​​the original image while avoiding amplifying image noise in a dark environment and causing the image effect to deteriorate.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a lens shading compensation method and device, a storage medium, and a terminal. Background technique [0002] Due to the physical characteristics of the lens, the amount of light passing through it gradually decreases from the center to the periphery. Therefore, the original image captured by a lens such as a mobile phone camera will appear bright in the center and gradually darken around, which seriously affects the image quality. [0003] Currently, a common processing method in the industry is to perform lens shading correction (Lens Shading Correction, LSC for short, also referred to as lens shading compensation) processing on the original image, so as to improve the image quality. [0004] Because the brightness performance of the original image is that the brightness of the central pixel is larger, and the brightness of the surrounding pixels decreases (t...

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): H04N5/357
CPCH04N25/61
Inventor 胡继瑶张春雷熊佳彭晓峰
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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