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Method for determining indoor illumination environment being as 50Hz or 60Hz

A 50hz, environmental technology, applied in optics, cameras, exposure control, etc., can solve problems such as flicker and achieve the effect of eliminating flicker

Active Publication Date: 2008-07-23
GUANGDONG VIMICRO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the default settings, if the user travels to a new country, the exposure will have a severe flickering problem

Method used

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  • Method for determining indoor illumination environment being as 50Hz or 60Hz
  • Method for determining indoor illumination environment being as 50Hz or 60Hz
  • Method for determining indoor illumination environment being as 50Hz or 60Hz

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Embodiment Construction

[0015] refer to figure 1 , a method for judging an indoor 50Hz or 60Hz lighting environment, comprising the steps of: (1) using an automatic exposure control program unit to automatically adjust the exposure time according to the current lighting brightness; Select an exposure time that is closest to the final result in step (1) from the exposure value, and set this exposure time value as the new exposure time of the entire system; (3) under the exposure time set in step (2), , calculate the difference D1 of the brightness value between the corresponding pixels of two consecutive frames of images; (4) select an exposure time that is closest to the final result in step (1) from another set of exposure values ​​set in advance, and use this The exposure time value is set as the new exposure time of the whole system; (5) under the exposure time set in step (4), calculate the difference D2 of the brightness value between the corresponding pixels of two consecutive frames of images;...

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PUM

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Abstract

A method for determining that light environment is 50 H2 or 60H2 in the room includes adjusting exposure time, selecting out set exposure time which is most close to adjusted time and using it as exposure time for system, calculating brightness D - value D1 of adjacent two images out in set exposure time; utilizing set exposure time in another group and using the same method to obtain brightness D - value D2 of two adjacent images; confirming that current light environment is 50 H2 if D1 is less that D2 and it is 60 H2 if D1 is greater than D2 or returning back to start if D is equal to D2.

Description

technical field [0001] The invention relates to the technical field of exposure of a photosensitive device, in particular to a method for assisting in eliminating the flicker phenomenon in a row exposure mode of a photosensitive device. Background technique [0002] Generally, the power supply we use is AC power supply, which leads to the fact that the luminous intensity of the light used for indoor lighting and the illuminance received by the surface of the object under the lighting environment of the lighting lamp are not constant. Due to the influence of this factor, there will generally be flickering in the process of doing automatic exposure. In the technology of patent application number 200310116978.6, a method for eliminating the flicker phenomenon in the line exposure mode of the photosensitive device is described, so as to solve the flicker problem existing in the output of the photosensitive device. In the method described in the invention, if the lighting lamp i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B7/091H04N5/235G03B7/08
Inventor 王浩刘勇俞青
Owner GUANGDONG VIMICRO