Method and device for calibrating color cast of flashlight

Abstract

The invention discloses a method and a device for calibrating color cast of a flashlight. The method comprises the following steps of obtaining original brightness values of three-primary colors corresponding to a current flashlight; obtaining reference brightness values of three-primary colors corresponding to a reference flashlight; obtaining a brightness ratio of the three-primary colors according to the original brightness values and the reference brightness values; obtaining a newest gain value corresponding to the current flashlight according to the brightness ratio and a corresponding reference gain value of the reference flashlight in the current environment; and obtaining an original picture for opening the current flashlight to shoot in the current environment and utilizing the newest gain value to carry out picture processing on the original picture to eliminate the color cast of the current flashlight. Through the method, a problem of the color cast can be reduced when the flashlight is utilized to take pictures, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of flash lamps, in particular to a method and device for calibrating color shift of flash lamps. Background technique [0002] Due to the difference in the production process of the flash, the color shift is often serious when taking pictures with the supplementary light of the flash. The reasons for the color shift of the flash are as follows: the flash installed on the mobile terminal, due to the design and process limitations of the flash, even the same batch of the same type of flash will have a deviation in the color temperature of the light emitted, and the maximum color temperature difference is about 1000K. Due to the great difference in the color temperature of the flashlight, and the existing mobile terminal platforms (such as Qualcomm and MTK platforms), the debugging of camera module (camera) parameters cannot well cover all flashlights with different color temperatures. Taking Qualcomm as an exa...

AI Technical Summary

Problems solved by technology

Due to the great difference in the color temperature of flashlights, and the existing mobile terminal platforms (such as Qualcomm and MTK platforms), the debugging of camera module (camera) parameters cannot well cover all flashlights with different color temperatures. Taking Qualcomm as an example, the current camera The module parameters can only set a set of white balance parameters for the flash. Due to the difference in color temperature of the flash, the white balance will have a color cast under different color temperature values, which will bring a poor user experience.

To put it another way, due to the difference in the color temperature of the flash, the color effect of the pictures taken by the flash with different color temperatures will be significantly different. The color of the picture with a large color cast is very different from the color of the real object.

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