A Color Consistency Method Based on Limitation of Light Source Color Distribution
A technology of color constancy and color distribution, applied in image analysis, image enhancement, instrumentation, etc., can solve problems such as the influence of color accuracy and the error of light source estimation results
Active Publication Date: 2021-02-02
HANGZHOU DIANZI UNIV
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When estimating the light source color of an image, if the image features do not meet the limited assumptions or the prior knowledge is insufficient, the accuracy of the light source color estimation will be affected, resulting in a large error in the light source estimation result.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] The technical scheme of the present invention can adopt computer software technology to carry out the process automatically. In order to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The embodiment of the present invention is to reduce the error of the estimation results of different light sources in the images of the SFU dataset. The SFU dataset is composed of 321 indoor images taken by the Computer Vision Laboratory of Simon Fraser University under 11 common light sources. refer to figure 1 , the process of the embodiment of the present invention includes the following steps:
[0032] Step (1) Construct accurate color gamuts for different cameras, and calculate the black body locus of the camera space;
[0033] Step (2) constructing the color gamut of the light source color distribution based on the blackbody locus;
...
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
Login to View More Abstract
The invention discloses a color constancy method based on light source color distribution limitation. The steps of the present invention are as follows: step (1) constructing accurate color gamut ranges for different cameras, and calculating the blackbody locus of the camera space; step (2) constructing the color gamut range of light source color distribution based on the blackbody locus; step (3) using existing colors The constancy method estimates the light source color of the image; step (4) judges the light source estimation result, if it is within the range of the color gamut, it will not be processed, and if it is not within the range of the color gamut, then map the light source estimation result to the color within the gamut boundary; Step (5) transforms the corrected chromaticity point into RGB space, and the point obtained by the color gamut mapping is the corrected chromaticity point of the estimated light source. The present invention maps the result of the existing color constancy method that the light source estimation is not in the color gamut to the boundary of the color gamut, thereby reducing the light source estimation error and improving the robustness of various color constancy methods.
Description
technical field [0001] The invention relates to a method of color constancy based on the limitation of the color distribution of light sources. It belongs to the technical fields of computer vision, image processing and color enhancement. Background technique [0002] Color can intuitively express the surface characteristics of objects, and plays an important role in the practical application of image processing and computer vision. However, the formation of color is often affected by changes in lighting conditions, resulting in extremely unstable expression of the color feature of the image. The human eye has the visual characteristic of constant color, even when the scene lighting source changes, the color perception of the object can still remain relatively unchanged. Since the digital imaging system does not have the color constant visual characteristics of the human eye, it is vulnerable to image color instability due to changes in lighting conditions during 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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/90
CPCG06T2207/10024G06T7/90
Inventor 张显斗刘硕李倩
Owner HANGZHOU DIANZI UNIV