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

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

Active Publication Date: 2009-11-25
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 embodiments of the present invention will be described below with reference to the accompanying drawings.

[0015] The camera device generally has an automatic exposure function, and the automatic exposure function adjusts the exposure parameters according to the current ambient brightness to make the average brightness Y of the sensed image. 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 similarly, only exposure time and image sensor gain may be included. In the process of automatic exposure, under the premise that the current ambient brightness remains unchanged, the longer the exposure time, the brighter the average brightness of the sensing image; on the contrary, the shorter the exposure time, the darker ...

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Abstract

The invention discloses an automatic control method for the supplementary light of an imaging device. The supplementary light of the imaging device has two working states of on and off, which includes: when the supplementary light is in the off state, when the automatic exposure parameter value is greater than or After being equal to the preset opening threshold, turn on the supplementary light; when the supplementary light is in the on state, after the automatic exposure parameter value is less than or equal to the predetermined closing threshold, turn off the supplementary light; wherein the predetermined opening threshold of the automatic exposure parameter value is greater than Scheduled closing threshold. In this way, the brightness of the environment is roughly judged according to the exposure parameter value in the camera device, and then the purpose of automatically controlling the turning on and off of the supplementary light is achieved, so that the photoresistor required in the prior art can be omitted in the camera device.

Description

technical field [0001] The invention relates to the field of light compensation of a camera device, and in particular to the field of automatic control of light compensation of a camera device. 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 capture a relatively clear image even 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 fill light can be 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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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/238G03B15/02
Inventor 李昕彤卢虹王浩
Owner VIMICRO ELECTRONICS CORP
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