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A method to automatically regulate the image brightness and automatic imaging device

An image brightness and automatic adjustment technology, applied in the field of image processing, can solve the problem of inability to adjust the brightness value, and achieve the effect of improving the overall visual effect, improving the sense of hierarchy, and improving the quality.

Inactive Publication Date: 2007-04-25
VIMICRO CORP
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Problems solved by technology

[0012] The present invention provides a method for automatically adjusting image brightness and an automatic imaging device to solve the problem in the prior art that the brightness value cannot be individually adjusted for a local area in a frame of image

Method used

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  • A method to automatically regulate the image brightness and automatic imaging device
  • A method to automatically regulate the image brightness and automatic imaging device
  • A method to automatically regulate the image brightness and automatic imaging device

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Embodiment Construction

[0042] The method for automatically adjusting image brightness provided by the present invention is divided into two parts for processing, one of which adopts the processing method of the prior art, including:

[0043] Perform image brightness statistics on the current frame image generated by the imager, and perform automatic exposure calculation according to the statistical results, output exposure parameters and electronic gain parameters to adjust the next image output by the viewfinder;

[0044] Another part is the newly added processing part of the present invention, including:

[0045] Statize the brightness value of the image in the specified area in the current frame image generated by the imager, and compare it with the set brightness threshold; when the brightness value of the image in the specified area is less than or equal to the set brightness threshold, increase the brightness value of the image in the specified area.

[0046] For this reason, a kind of automat...

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Abstract

The invention relates to a method for automatically adjusting image brightness. Wherein, it comprises that calculating out the image brightness of present frame generated by imager; calculating out the automatic exposure; outputting exposure parameters and electric gain parameters to adjust the output next image of viewer; and it also comprises that calculating out the brightness of appointed region of present frame generated by viewer, to be compared with preset threshold value; when it is lower, increasing the brightness. The invention discloses a relative automatic imager. The invention can adjust the brightness of local area, to improve its contrast and image quality.

Description

technical field [0001] The invention relates to image processing, in particular to a method for automatically adjusting image brightness and an automatic imaging device in the process of automatic photography / camera. Background technique [0002] In the prior art, there are various video recording devices that automatically control photography / camera, which can automatically adjust the shutter and aperture of the video recording device according to the brightness and darkness of the scene to be photographed, so that the finally obtained image meets a certain brightness or clarity requirement. [0003] Taking a digital video camera as an example, its image brightness automatic control block diagram is shown in Figure 1, including: [0004] Viewfinder, exposure module, electronic gain module, imager, image brightness statistics module and automatic exposure calculation module; where: [0005] Viewfinder: used to select the subject; [0006] Exposure module: adjust the shutte...

Claims

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Application Information

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IPC IPC(8): H04N5/243H04N5/225
Inventor 游明琦涂坚
Owner VIMICRO CORP
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