A method and system for testing ambient color temperature based on multi-spectral image detection technology

Abstract

An environmental color temperature testing method and system based on multi-spectral image detection technology, the method first uses a spectrum chip to obtain images and multi-spectral data with uniform brightness of the 1.2.3...m color squares in the standard color palette, for each All color squares obtain N groups of multispectral data matrices; N groups of multispectral data matrices are subjected to time and space noise reduction processing, and finally n multispectral data are obtained, and the first 1.2.3....I are determined in turn according to this method The standard multispectral data x of the mth color square under the color temperature value st (n, I CCT ); Utilize the mobile phone or video camera that contains color temperature test system of the present invention afterwards to obtain the multi-spectral data x of multiple specific color regions in the scene picture et (n), the multi-spectral data of the same band is averaged, and the ambient light multi-spectral data and the standard multi-spectral data x are combined by the color temperature matching module st (n, I CCT ) to calculate the standard variance, and the color temperature value with the smallest variance is the ambient light color temperature value; this method realizes fast, accurate and efficient detection of color temperature.

Description

technical field [0001] The invention relates to the technical field of spectrum identification and the technical fields of video monitoring and mobile terminals, in particular to an environmental color temperature testing method and system based on multi-spectral image detection technology. Background technique [0002] Different light sources have different spectral components and distributions, which are called color temperature in chromatics. Affected by the color temperature of the environment, the pictures taken by the image sensor often have a color cast. In addition to the color cast of the picture, the light also causes the image to be oversaturated or undersaturated, which seriously distorts the color of the picture. At present, people use white balance adjustment technology to deduct or supplement the influence of ambient light to eliminate this color cast, but the existing adjustment technologies are all concentrated on the white balance algorithm, for example: [...

AI Technical Summary

Problems solved by technology

However, this technology uses a single-point sensor to sum and average all optical signals. When the color temperature of the incident light source is different in different directions or positions, it cannot be effectively distinguished, so the environmental applicability is insufficient and the accuracy is low.

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