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Exposure regulating method and device

An adjustment method and technology of an adjustment device, which are applied in the control of exposure, optics, television, etc., can solve the problems of wasting electricity, fixed light intensity, and blurred images, and achieve the effects of saving power, avoiding blurring images, and reducing exposure time.

Inactive Publication Date: 2008-05-21
VIMICRO CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to solve the problem of blurred images caused by shaking when the camera device adopts LED light source; the second purpose is to solve the problem of wasting electricity caused by the fixed light intensity after the LED light source is turned on

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  • Exposure regulating method and device

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Embodiment Construction

[0020] Because the cameras configured on ordinary mobile phones are generally relatively simple and do not have the aperture adjustment function, the camera devices involved in the following embodiments do not have the aperture adjustment function, and are suitable for ultra-close For example, take pictures of objects less than 10cm away from the lens. A pulse control method can be used to adjust the brightness of the LED light source by using the duty cycle of the pulse, so that the LED light source can be programmed to adjust its brightness continuously and smoothly in a bright state. Thus, when the duty cycle is 0, the LED light source is extinguished; when the duty cycle is 1, the LED light source reaches the brightest state; when the duty cycle changes between 0 and 1, the brightness of the LED light source also changes.

[0021] refer to figure 1 , figure 1 A flow chart showing an exposure adjustment method according to a specific embodiment of the present invention. ...

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Abstract

This invention discloses a method for adjusting a super-near distance exposure used in a camera applying LED light source and a device without aperture regulation function. The method includes: determining the brightness value of images collected by a camera, if the value is greater than a first value, the exposure is over, then the exposure parameter is adjusted, which automatically regulates the exposure time and duty ratio to avoid image fuzziness caused by vibration in shooting and increase image quality.

Description

technical field [0001] The present invention relates to an exposure adjustment method and device for image quality, in particular to an exposure adjustment method and device for an imaging device using an LED light source. Background technique [0002] Many mobile phones are already equipped with cameras, which can take pictures, but the cameras configured on ordinary mobile phones are generally simple and do not have aperture adjustment function, and some mobile phones are also equipped with LED lights as auxiliary lighting sources. A general LED has two states, namely on and off, corresponding to the light on and off. However, the working modes of these LED lights are relatively limited, mainly including automatic flash mode, forced flash mode, and continuous lighting mode. In auto flash mode and forced flash mode, the LED is off before taking a photo. In the automatic flash mode, the LED light will be flashed according to the ambient brightness at the moment of taking a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B7/08H04N5/235G03B7/0805G03B30/00
Inventor 王浩陈东瑛
Owner VIMICRO CORP