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A method and device for automatic control of light supplementary light of shooting device

A technology of an automatic control device and a camera device, which is applied in the field of light compensation of a camera device and automatic control of light compensation of a camera device, and can solve problems such as increasing costs.

Active Publication Date: 2008-01-09
VIMICRO ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires the use of photoresistors. In this way, not only must the installation space be reserved for the photoresistors in the camera device, but also the cost of the photoresistors will be increased.

Method used

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  • A method and device for automatic control of light supplementary light of shooting device
  • A method and device for automatic control of light supplementary light of shooting device
  • A method and device for automatic control of light supplementary light of shooting device

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Embodiment Construction

[0014] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

[0015] Cameras generally have an automatic exposure function, which adjusts the exposure parameters according to the current ambient brightness so that the average brightness Y of the sensed image is MEAN Try to stay within the appropriate range. The exposure parameters may include exposure time ET (Exposure Time), digital gain DG (Digital Gain) and image sensor gain SG (Sensor Gain). Of course, in other embodiments, the exposure parameters may only include exposure time and digital gain, and also may only include exposure time and image sensor gain. In the automatic exposure process, under the premise that the current ambient brightness remains unchanged, the longer the exposure time, the brighter the average brightness of the sensed image, on the contrary, the shorter the exposure time, the darker the average brightness of the sensed i...

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Abstract

The camera light-compensating lamp has two working modes, namely opening mode and closing mode. It comprises: when the light-compensating lamp is at closed mode, if the parameter value of automatic exposure is more than or equals a preset opening threshold, the light-compensating lamp is opened; if is small than a closing threshold, the light-compensating lamp is closed. The invention uses a exposure parameter to estimate the ambient brightness in order to open or close the light-compensating lamp.

Description

technical field [0001] The invention relates to the field of light compensation of camera devices, in particular to the field of automatic control of light compensation of camera devices. technical background [0002] With the development of science and technology, camera devices are widely used in various fields. Since the camera device generally needs the environment to have a certain brightness when collecting images, in order to ensure that the camera device can collect relatively clear images when the external environment is dark, many camera devices are equipped with fill lights. . When the external environment is dark, the supplementary light is automatically turned on for auxiliary lighting to meet the brightness required for image acquisition; when the environment is bright, the supplementary light is automatically turned off to save power. The supplementary light may be an LED (Light emitting diode). [0003] In the prior art, a photoresistor is generally used t...

Claims

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Application Information

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IPC IPC(8): H04N5/238G03B15/02
Inventor 李昕彤卢虹王浩
Owner VIMICRO ELECTRONICS CORP
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