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.

Inactive Publication Date: 2010-07-07
ARKMICRO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problem of poor output image quality and uneven brightness transition of a digital camera device under low illumination conditions, the present invention proposes a device and method for realizing brightness adjustment through gamma correction

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  • Device and method for regulating image brightness by gamma
  • Device and method for regulating image brightness by gamma
  • Device and method for regulating image brightness by gamma

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Embodiment Construction

[0032] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] In this specific embodiment, the camera DSP chip improves the display brightness through gamma correction as an example. The camera chip often needs to increase the brightness of the low-illuminance area, and the curvature change of the gamma curve in the low-illuminance area is the largest. In order to achieve a better display effect, the transition of the gamma curve in the low-illuminance area needs to be smoother and the degree of approximation is higher.

[0034] Among them, the camera input takes an 8-bit RGB image as an example, such as figure 1 Shown is a block diagram of the device for adjusting image brightness through gamma correction described in the specific embodiment of the present invention, the device includes a register configuration unit 100, a gamma curve generation unit 101, a data partition unit 102 and a data proc...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/243
Inventor 胡亮刘俊秀李汉光石岭王雅君鲁红春
Owner ARKMICRO TECH
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