Device and method for regulating image brightness by gamma

An image brightness and gamma correction technology, applied in the field of image processing, can solve the problems of poor image quality and uneven brightness transition, and achieve the effect of uniform brightness transition, clear output image and saving hardware resources.
CN101771827AInactive Publication Date: 2010-07-07ARKMICRO TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ARKMICRO TECH
Publication Date
2010-07-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a device for regulating image brightness by gamma, comprising a register configuration unit, a gamma curve generation unit, a data partitioning unit and a data processing unit, wherein, curve parameters are inputted into the register configuration unit to be configured to the corresponding registers and the wanted gamma curves are generated in the gamma curve generation unit according to the configuration values in the registers; meanwhile, image data are inputted into the data partitioning unit for partitioning, the partitioned data and the generated gamma curves are inputted into the data processing unit and the regulated image brightness data are generated. The invention also provides a regulation method according to the device. The device and the method of the invention improve the quality of the outputted image under the situation of saving hardware resource and ensure the outputted image clearer.
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Description

technical field

[0001] The invention relates to the field of image processing, in particular to a device and method for brightness adjustment in a digital camera processing chip. Background technique

[0002] Gamma correction is to correct a kind of distortion caused by the characteristics of the current display device itself. In the current TV and graphic monitors, the electron beam generated by the picture tube and the brightness of the image generated do not change linearly with the input voltage of the picture tube. Instead, there is a non-linear relationship as shown in the following formula, which causes a deviation in brightness between the input image and the actual output image, and there is a distortion.

[0003] Luminance=Voltage γ .

[0004] Among them, different displays have different γ values. When γ=1.0, it is an ideal situation, and there is no deviation in the image; when γ>1.0, the high-light part of the displayed image is compressed and the low-light...

Claims

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