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Automatic exposure control method

A control method and automatic exposure technology, applied in the field of photography, can solve the problem of not being able to obtain proper overall brightness images

Inactive Publication Date: 2009-07-22
ALTEK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an automatic exposure control method to solve the problem that the image with proper overall brightness cannot be obtained in the known technology

Method used

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Embodiment Construction

[0019] Please refer to figure 1 , is a method flowchart of an automatic exposure control method according to an embodiment of the present invention. like figure 1 As shown, the automatic exposure control method is used to control a shooting exposure parameter for shooting an image at the shooting end. The image is composed of a subject area and a background area. Here, the main object area and the background area refer to the main object area and the background area presented in the planar image.

[0020] Firstly, the information of the subject area and the background area of ​​the image is provided (step 10), and then the brightness value of the subject area, the brightness value of the background area, and the whole synthesized by the brightness value of the subject area and the brightness value of the background area are obtained. Brightness value (step 20).

[0021] Then, according to the luminance value of the main object area and the luminance value of the background...

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Abstract

The invention discloses an automatic exposure control method for controlling a shooting exposure parameter of a shooting image at a shooting end. The method comprises: acquiring at least one middle luminance value between the luminance value of a background zone and an integral luminance value, orderly judging a relation of a flash lamp operation distance individually corresponding to the luminance value of the background zone, the middle luminance value and the integral luminance value and a main body actual distance from the luminance value of the background zone to the integral luminance value, obtaining the shooting exposure parameter and selectively starting the flash lamp to adjust the integral luminance of the shooting image, thereby obtaining the image with a proper integral luminance.

Description

technical field [0001] The invention relates to an imaging technology, in particular to an automatic exposure control method. Background technique [0002] At present, the overall brightness of an image obtained when capturing an image is determined by exposure parameters such as exposure speed series, aperture value, and exposure time. And an exposure parameter corresponds to a brightness value. When photographing an object under backlight, the resulting image will have brighter parts and darker parts. When the brightness of the background area is bright, the brightness of the main object area will be relatively dark, that is, the brightness contrast between the background area and the main object area will be large. And because of the high brightness contrast between the main object area and the background area, when the brightness value is adjusted to brighten the main object area, it also makes the original brighter background area brighter, causing the background area...

Claims

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Application Information

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IPC IPC(8): H04N5/235G03B7/16G03B7/17
Inventor 黄思华钟镇远
Owner ALTEK CORP
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