Digital-camera-parameter-variable imaging type method for obtaining color tristimulus value

A tristimulus value, digital camera technology, applied in the field of training and actual measurement, can solve the problem of fixed camera parameters, etc., to achieve the effect of increasing the degree of freedom, improving adaptability and practicability

Inactive Publication Date: 2014-11-26
ZHEJIANG UNIV
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defect that the camera parameters must be fixed during the training and actual measurement of the existing camera color meas

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
  • Digital-camera-parameter-variable imaging type method for obtaining color tristimulus value
  • Digital-camera-parameter-variable imaging type method for obtaining color tristimulus value
  • Digital-camera-parameter-variable imaging type method for obtaining color tristimulus value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Taking Nikon digital SLR camera D3x with Nikon AF-S NIKKOR 24-120mm f / 4G ED VR lens as an example, the method of using this digital camera to obtain the tristimulus value of object color by imaging is explained. It should be noted that the present invention is not limited to Nikon digital SLR cameras, and any digital camera that can obtain a Raw file format is applicable to the present invention.

[0029] like figure 1 As shown, the method for obtaining color tristimulus values ​​by means of imaging with variable digital camera parameters of the present invention specifically includes the following steps:

[0030] (1) Perform characterization training on digital cameras: obtain the RGB values ​​and XYZ values ​​corrected by the uniformity of the training samples, and the transformation coefficient matrix M, and record the camera shooting parameters during training; specifically include the following sub-steps:

[0031] (1.1) Take training samples. Select the GretagMac...

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 digital-camera-parameter-variable imaging type method for obtaining a color tristimulus value. According to the method, digital camera filming set parameters are introduced to serve as input variables, association between different set parameters of actually-measured samples and training samples is built through zoom and restoration, a polynomial model is used for the scale of the training samples, the RGB space is converted into the XYZ space, and finally the real XYZ tristimulus value of the actually-measured samples is restored. By means of the digital-camera-parameter-variable imaging type method for obtaining the color tristimulus value, the defect that in a traditional method, filming parameters of a camera are required to be fixed to conduct training and measuring is overcome, so that the digital camera can conduct training under a fixed filming parameter, the filming parameters are changed freely to conduct actual filming measuring, and convenience is brought for the digital camera to serve as an imaging type color measuring instrument.

Description

technical field [0001] The invention relates to a method for obtaining color tristimulus values ​​based on digital camera imaging in a color management system, especially a method for training and actual measurement under the condition that the setting parameters of the digital camera change. Background technique [0002] At present, compared with traditional color measurement equipment, using a commercial digital camera as an imaging color measurement instrument has the advantages of low cost and easy operation, so it has been more and more used in the field of quantitatively capturing scene chromaticity information . However, the RGB space of the camera is a device-dependent space. Using different cameras in the same scene will result in different RGB values. Therefore, it is necessary to establish a mapping relationship between the camera RGB space and the CIEXYZ space, which is camera characterization. In order to ensure that the original camera capture data is obtained...

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): H04N17/00H04N17/02
Inventor 徐海松方竞宇汪哲弘吴晓玟
Owner ZHEJIANG UNIV
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