Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method of estimating scene light source colors of color image

A color image and light source technology, applied in the field of computer vision and image processing, can solve problems such as poor flexibility, complex calculation, and need for training, and achieve the effect of less parameters, simple calculation, and good effect.

Active Publication Date: 2013-08-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is the same as some other learning-based methods for estimating the color of light sources in image scenes. The main disadvantage is that the calculation is complex and requires training. Applications on consumer cameras that require real-time processing, such as image tone correction, white balance

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 of estimating scene light source colors of color image
  • Method of estimating scene light source colors of color image
  • Method of estimating scene light source colors of color image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The primary visual cortex (area V1) is the most important visual cortex for the processing of visual information by the human visual system. There is a color-sensitive dual antagonistic neuron with both spatial and color antagonistic receptive field structures in the center and periphery of the V1 area. It has always been It is considered to be the physiological basis for the human visual system to realize color constancy, and based on this, the scene light source color estimation method of the present invention is proposed.

[0026] The following is a specific description through an embodiment.

[0027] Download an image (IMG_0788.png) and its corresponding real light source color from the currently internationally recognized image library website for estimating the color of the scene light source. Processing (such as tone correction, gamma value correction). The schematic flow chart of the detailed steps of the present invention is as figure 1 As shown, the specific...

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 method of estimating scene light source colors of a color image. The method of estimating the scene light source colors of the color image comprises extracting color components in the image, calculating a component of single-antagonism color space, calculating a response value of a double-antagonism color space, transforming the double-antagonism color space into three primary color space and calculating light source colors in the three primary color space. Because the size and the amplitude value of a difference of Gaussian (DoG) filter are flexibly selected in the double-antagonism color space so as to simulate color sensitivity of a primary visual cortex and receptive field characteristics of a double-antagonism neuron, the light source color value of an image scene can be fast and efficiently calculated according to the method, and the scene light source color value finally acquired can be used for a plurality of follow-up computer visual applications such as tone correcting and white balance. The method of estimating the scene light source colors of the color image has the advantages of fast and efficiently working out information of the light source colors of the image of each scene through simple and flexible parameter selection.

Description

technical field [0001] The invention belongs to the technical field of computer vision and image processing, and in particular relates to scene light source color estimation of color images. Background technique [0002] In the natural environment, the human visual system has the ability to resist the color change of the light source in the scene. For example, for the same scene, whether it is illuminated by yellowish sunlight in the morning or reddish sunlight in the evening, the color of the scene perceived by our visual system remains constant. This ability is also called For the color constancy of the visual system. However, due to technical limitations, images captured by physical devices, such as cameras, often have serious color casts due to color changes of light sources in the scene. This color cast caused by the change of the light source color on the image recorded by the machine equipment will seriously interfere with various subsequent computer vision applicat...

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): G06T7/40
Inventor 李永杰高绍兵杨开富李朝义
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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
Eureka Blog
Learn More
PatSnap group products