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Method and device for clearing explosure flash

A technology of exposure time and photosensitive device, applied in the field of image processing, can solve the problems of unsatisfactory image brightness, stripe noise, and inability to take into account the stripe noise of environmental brightness, so as to reduce the flicker phenomenon and increase the brightness.

Inactive Publication Date: 2009-03-25
VIMICRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In such a power supply lighting environment, if the ambient brightness is too high, the above-mentioned problems that may occur in a 50Hz bright environment will also occur
[0004] Therefore, the problem existing in the prior art is that in the presence of an AC power lighting environment, when the exposure time is no longer a positive integer multiple of the AC half cycle, the environment brightness and possible band noise cannot be taken into account, so that the obtained image or The brightness of the image is not ideal due to the consideration of eliminating the bright and dark stripes caused by band noise, or the introduction of band noise due to the consideration of obtaining an image with appropriate brightness

Method used

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  • Method and device for clearing explosure flash
  • Method and device for clearing explosure flash
  • Method and device for clearing explosure flash

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Embodiment Construction

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] In the embodiment of the present invention, for an image with fixed light and dark stripes obtained by a photosensitive device, the brightness gain value of each row of data in the direction parallel to the bright and dark stripes in the image is calculated; the brightness gain value of each row of data is used to adjust each Adjust the brightness value of the data, reduce the brightness of bright stripes, and increase the brightness of dark stripes. Wherein, the image obtained by the photosensitive device may be a video image or a static two-dimensional image.

[0044] The embodiments of the present invention mainly process images with fixed positions of bright and dark stripes. Therefore, the first thing that needs to be done in ...

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Abstract

This invention discloses a method for eliminating flicking of exposure including: computing the brightness gain values of the data of each row on the direction parallel to the light and shade strips in an image with fixed positions of the strips got by a sensitive device to adjust the brightness values of the data on the image based on the gain values to reduce the brightness of the light strips and increase the brightness of the shade. This invention also discloses a device for eliminating flicking of exposure based on said method for eliminating or weakening the influence of strip noise to image result.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for eliminating exposure flicker. Background technique [0002] When taking photos under 50Hz AC lighting, in order to avoid band noise in the obtained image, it is usually necessary to set the exposure time of the photosensitive device to an integer multiple of 1 / 100 second. The exposure accuracy of 1 / 100 second can make the image obtained under the 50Hz AC lighting, will not introduce band noise. However, in some environments, if the ambient brightness is very high, and there is lighting brightness provided by AC power in the ambient brightness, then even if the exposure time is reduced to 1 / 100 second, the exposure time is still relatively long compared to such ambient brightness, The resulting image will be whitish as a whole, and even part of it will be lost due to too long exposure time. In such an environment, if the exposure time continues t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/243H04N5/217
Inventor 王浩俞青
Owner VIMICRO CORP
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