Image shadow removing method and system

An image and shadow technology, applied in the field of image processing, can solve the problems of high-pass filter difficulty, time-consuming frequency domain processing, and poor control of shadow removal, so as to avoid lengthy large-window convolution operations and improve processing speed Effect

Active Publication Date: 2020-09-11
上海铼锶信息技术有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can process the illumination uniformly based on the judgment of the illumination model and the shadow area, but this method also has some problems: first, the image needs to undergo fast Fourier transform and inverse transform, and the frequency domain processing is often time-consuming. , it is often difficult to select a high-pass filter that does not affect the high-frequency part of the image, and the degree of shadow removal is not easy to control

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
  • Image shadow removing method and system
  • Image shadow removing method and system
  • Image shadow removing method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings, but these embodiments do not limit the present invention, those of ordinary skill in the art make structural, method, or functional changes based on these embodiments All are included in the scope of protection of the present invention.

[0054] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.

[0055] Such as figure 1 As stated, the present invention provides a method for removing shadows from an image, comprising the foll...

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 an image shadow removing method and system, and relates to the field of image processing. The image shadow removing method comprises the following steps: S1, acquiring an original image, and converting the original image into an HSV space; s2, carrying out channel separation on the HSV space; s3, filtering the V-channel image by adopting a spatial Gaussian filtering methodto obtain an illumination image; s4, obtaining a reflectivity image; and S5, obtaining a shadow-removed image. According to the method, details and colors of an original image can be well saved without being damaged while shadows of the image are well weakened or removed, Gaussian filtering processing is carried out on the image through a fast spatial domain Gaussian filtering method for a large filter window, lengthy large window convolution operation is avoided, and the processing speed is increased.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to a method and system for removing shadow from an image. Background technique [0002] Shadows in images sometimes interfere with image information, causing poor image quality. When performing tasks such as image object segmentation and target recognition, the existence of shadows will seriously affect the performance of specific segmentation and recognition algorithms. For humans, shadows are relatively easy to distinguish, but for computers, it is a more difficult task to completely remove shadows. For the removal of image shadows, there are many methods that can be used, and these methods can also be divided according to different angles. For example, Chinese invention patent application CN10629666A discloses a method for removing shadows from an image, including shadowless feature analysis, shadowless transformation parameter acquisition, and shadowless feature imaging...

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
CPCG06T5/005G06T2207/20024
Inventor 熊杰成
Owner 上海铼锶信息技术有限公司
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