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

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...

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 measurement methods, the present invention provides a method for obtaining color tristimulus values ​​by means of imaging with variable digital camera parameters

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