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Method for automatically controlling exposure and device for automatically compensating exposure

A technology of automatic exposure and exposure compensation, which is applied to TVs, color TV parts, electrical components, etc., and can solve problems such as uneconomical value, cost increase, and complicated production

Active Publication Date: 2007-06-20
ICATCH TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent, the structure of the camera needs to be equipped with a sensor for measuring distance, so the production is more complicated and the cost is also increased. Therefore, it is not economical for most camera manufacturers and developers and consumers. value

Method used

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  • Method for automatically controlling exposure and device for automatically compensating exposure
  • Method for automatically controlling exposure and device for automatically compensating exposure
  • Method for automatically controlling exposure and device for automatically compensating exposure

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Embodiment Construction

[0027] In order to reduce the failure of scene judgment, so that each scene situation can be appropriately subjected to exposure compensation, the present invention provides a method of automatic exposure control that is different from the known technology. The technical content will refer to the implementation disclosed in the accompanying drawings. Example to illustrate:

[0028] Please refer to FIG. 3 which shows a flowchart of an automatic exposure control method according to an embodiment of the present invention. Figure 3 is divided into six execution steps, which are 302, 304, 306, 308, 310, and 312 in sequence. Wherein, step 302 is to establish a coordinate domain, and the detailed establishment steps thereof can be illustrated by the flowchart of the steps of establishing a coordinate domain according to an embodiment of the present invention shown in FIG. 4.

[0029]Figure 4 is divided into 6 execution steps, which are 402, 404, 406, 408, 410, and 412 in sequence. Wherei...

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Abstract

The method comprises: building a coordinator domain corresponding to multi steps of exposure compensation, and setting threshold values for bright area and dark area; calculating ratio of the amount of pixels whose brightness are more than the threshold value of bright area to the total amount of pixels in order to get the ratio value of bright area; calculating the ratio of the amount of pixels whose brightness are less than the threshold value of dark area to the total amount of pixels in order to get the ratio value of dark area; according to the ratio value of bright area and the ratio value of dark area, determining the location of image in the coordinator domain; according to the steps of coordinator domain where the image locates at, compensating the exposure to the image.

Description

Technical field [0001] The present invention relates to an exposure control method and an exposure compensation device, and more particularly to an automatic exposure control method and an automatic exposure compensation device for determining an exposure compensation value of an image. Background technique [0002] The component units of the color image processing device system mainly include an image capture unit, an image restoration and processing unit, an image display unit, and an image compression unit. The image capture unit is composed of an image sensor, which is A two-dimensional array component composed of photo-diodes. The photosensitive component converts the sensed light intensity into an electronic signal for the subsequent image restoration and processing unit to perform appropriate image processing. Because the direction and intensity of the light source of the scene being photographed will be different, the main picture may be too bright or too dark. The exposu...

Claims

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Application Information

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IPC IPC(8): H04N5/235H04N5/243
Inventor 吴政育林哲弘陈鸿仁
Owner ICATCH TECH INC
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