A digital camera and its method to correct brightness

Abstract

The related DC can modify and define the brightness of digital image, which comprises: setting standard brightness value; reading original RGB data of image; setting the original gain values for RGB respectively; calculating original data to obtain an average brightness value; comparing the standard value and the calculated value to obtain a ratio; multiplying the ratio to the original RGB gain value to obtain relative adjustment gain value, and defining the image brightness.

Description

technical field [0001] The invention relates to a digital camera and a method for correcting brightness thereof. In particular, it relates to a digital camera capable of correcting brightness errors caused by hardware errors of the digital camera and a method for correcting brightness. Background technique [0002] When the user is taking pictures, the Charge Coupled Device (CCD) of the digital camera (Digital Camera) will convert the captured optical signal into an electronic signal, and then record it on the built-in memory of the digital camera to Create a digital image. Usually under different light conditions, in order to adjust the color of its digital image, the digital camera will automatically adjust the white balance, for example, as described in Taiwan Patent Application No. 84109705. At this time, the processor of the digital camera will calculate its R Gain value, G Gain value, and B Gain value based on the R, G, and B values ​​of each pixel of the digital ima...

AI Technical Summary

Problems solved by technology

[0004] However, due to slight differences in the hardware structure of digital cameras, such as differences in the assembly of the flash cover or the current flow of the flash tube, etc., there may still be brightness errors, and these errors will affect the brightness of the digital image. It may even result in under-brightness or over-exposure

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