White balance calibration method, device and system

Abstract

Embodiments of the present invention provide a white balance calibration method, device, and system, the method comprising acquiring an xyz chromaticity space matrix, and converting the xyz chromaticity space matrix into an rgb chromaticity space matrix in an RGB coordinate system; based on the The rgb chromaticity space matrix traverses the gain register values ​​within the preset range to select the target white color coordinates that meet the preset white balance conditions; according to the target white color coordinates, red, green, and blue in the white picture The ratio of the three primary colors is adjusted to achieve white balance calibration. The invention has strong universality, can meet the white balance calibration requirements of different display devices, and has low implementation cost and high calibration precision.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a white balance calibration method, device and system. Background technique [0002] The inventors have found through research that the current display device manufacturers basically do not have the ability to perform white balance calibration on the entire display device. For example, for projectors, the white balance calibration is mainly done by the optical machine factory, specifically through the interface of Texas Instruments to change the rotation duty cycle of the red, green, and blue lights in the optical machine LED light source to achieve white balance calibration , so that the complete machine manufacturer of the projector needs to rely on the white balance interface of the chip factory Texas Instruments and the firmware layout of the optical machine factory. Sequence files often lead to optical-mechanical software instability, color cast and other p...

AI Technical Summary

Problems solved by technology

For example, for projectors, the white balance calibration is mainly done by the optical machine factory, specifically through the interface of Texas Instruments to change the rotation duty cycle of the red, green, and blue lights in the optical machine LED light source to achieve white balance calibration , so that the complete machine manufacturer of the projector needs to rely on the white balance interface of the chip factory Texas Instruments and the firmware layout of the optical machine factory. Sequence files often lead to problems such as optical-mechanical software instability and color cast in the picture. Therefore, for those skilled in the art, it is urgent to study a white balance calibration technology with high versatility, low cost, and high calibration accuracy.

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