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Method and apparatus for determining ambient light

A technology of ambient brightness and average brightness, applied in the field of signal processing, can solve the problems that the environmental brightness classification is too simple, the influence of the image brightness of the image acquisition equipment is not considered, and the accuracy is not high, and the effect of low cost, simple implementation and high precision is achieved.

Inactive Publication Date: 2008-02-20
VIMICRO CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the method of estimating the ambient brightness through the camera is simply to roughly divide the ambient brightness into several grades according to the exposure time, without considering the influence of the image acquisition equipment on the image brightness, and the classification of the ambient brightness is also too simple , so the accuracy of this method is not high

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  • Method and apparatus for determining ambient light
  • Method and apparatus for determining ambient light
  • Method and apparatus for determining ambient light

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Embodiment Construction

[0019] The embodiment of the present invention provides a method and device for determining environmental brightness. In the embodiment of the present invention, considering the various links in the image signal processing module (ISP, Image signal processing) that have an influence on the brightness of the final output image during the imaging process, the target surface illuminance of the photosensitive device (sensor) is used to estimate Relatively accurate environmental brightness information, and the technical solutions provided by the embodiments of the present invention are simple to implement and low in cost.

[0020] The imaging devices mentioned in the embodiments of the present invention include cameras, digital cameras, camcorders, and all other imaging devices that support automatic exposure. The embodiment of the present invention can determine the environmental brightness according to the exposure parameters of the imaging device without adding additional hardware. ...

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Abstract

The utility model discloses a method and device that determines environment luminance, aiming to provide a technical proposal of determining environment luminance with the advantages of high accuracy, easy realization and low cost. The utility model is characterized in that the even luminance of images formed by the sensitization device of the imaging equipment is obtained; the environment luminance is determined according to the proportion relation of the image even luminance and the environment luminance. The utility model can be used to more accurately determine environment luminance.

Description

Technical field [0001] The present invention relates to the technical field of signal processing, and in particular to a method and device for determining environmental brightness. Background technique [0002] With the development of information technology, cameras have been popularized in many multimedia devices. These devices often work in different environments. It is sometimes very useful to get the brightness information of the surrounding environment based on the camera information, such as changing the display device according to changes in the brightness of the environment. (Such as notebooks, desktops and mobile phone display terminals, etc.) display brightness, thereby saving power while protecting people's eyesight. In addition, some special fields also require environmental brightness, such as certain automatic doorbells or alarm devices that need to measure sudden changes in environmental brightness. [0003] In the prior art, the ambient light brightness is general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/52G09G5/10
Inventor 孙余顺王浩
Owner VIMICRO CORP
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