Image collection method and device

A technology of image acquisition and image acquisition, which is applied in the computer field, can solve the problem of long tailing phenomenon and achieve the effect of shortening the time

Active Publication Date: 2018-11-23
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

[0005] In order to solve the problem that when the image acquisition device directly adjusts the shutter duration from the shutter adjustment threshold value to the shutter maximum value under low-illuminance conditions, the captured image has a longer duration of smearing, an embodiment of the present invention provides a Image acquisition method and device

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0053] Image acquisition device: used to acquire the image of the target. A camera component is arranged inside the image acquisition device, and the image acquisition device includes but is not limited to the following types: camera, video camera, mobile phone, tablet computer, wearable device, desktop computing and laptop portable computer.

[0054] Shutter: Used to control the amount of time light enters the inner photosensitive surface of the body during image capture. When shooting a fast-moving target, the shutter duration is shorter, and the exposure is less; when the light is low, the shutter duration is usually longer, and the exposure is larger.

[0055] Gain: refers to the gain of the automatic gain control (Automatic Gain ...

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Abstract

The invention discloses an image collection method and device and belongs to the field of a computer. The method comprises the steps of obtaining light intensity of a current collection environment; keeping duration of a shutter at a first shutter threshold if the light intensity is located between first preset intensity and second preset intensity; keeping an aperture at a first aperture threshold; adjusting gain according to the light intensity and a first corresponding relationship, thereby obtaining first gain; keeping the gain at a first gain threshold if the light intensity is located between third preset intensity and the first preset intensity; keeping the aperture at the first aperture threshold; and adjusting the duration of the shutter according to the light intensity and a second corresponding relationship, thereby obtaining first shutter duration. According to the method and the device, the problem that the duration of a trailing phenomenon in a collected image is relatively long when the duration of the shutter is directly adjusted from the shutter adjustment threshold to the shutter maximum under the condition that the image collection device is in a low illuminationlevel condition is solved, and the duration in which the image collection device collects the image with the trailing phenomenon is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of computers, and in particular to an image acquisition method and device. Background technique [0002] Image acquisition devices usually have an automatic exposure function. The automatic exposure function enables the image acquisition device to automatically adjust the exposure to a suitable value under different brightness conditions. The image acquisition device usually adjusts the exposure through three parameters of shutter, gain and aperture. [0003] In a scene where the light intensity of the ambient light gradually decreases (such as in the evening), if the automatic exposure function of the image acquisition device is turned on, the image acquisition method of the image acquisition device includes three stages: the first stage: the image acquisition device detects the gradually reduced Whether the light intensity reaches the shutter adjustment threshold; if it reaches the shutter ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235G08G1/017H04N7/18
CPCH04N7/181G08G1/017H04N23/71H04N23/73
Inventor 张国平马伟民
Owner HANGZHOU HIKVISION DIGITAL TECH
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