Image acquisition method and device

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

Active Publication Date: 2021-03-16
HANGZHOU HIKVISION DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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Embodiment Construction

[0052] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0053] Image acquisition device: used to acquire the image of the target. A camera assembly is arranged inside the image capture device, and the image capture device includes but is not limited to the following: cameras, video cameras, mobile phones, tablet computers, wearable devices, desktop computing and laptop computers.

[0054] Shutter: Used to control the length of time that light enters the internal photosensitive surface of the fuselage during image capture. When shooting a fast-moving target, the shutter duration is shorter, and the exposure is smaller; when the illumination 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 Con...

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Abstract

The invention discloses an image acquisition method and device, belonging to the field of computers. The method includes: acquiring the light intensity of the current collection environment; if the light intensity is between the first preset intensity and the second preset intensity, then keeping the shutter time is the first shutter threshold; keeping the aperture is the first aperture threshold; The light intensity and the first correspondence adjust the gain to obtain the first gain; if the light intensity is between the third preset intensity and the first preset intensity, then keeping the gain is the first gain threshold; keeping the aperture is the first aperture threshold; The shutter duration is adjusted according to the light intensity and the second corresponding relationship to obtain the first shutter duration. The disclosure solves 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 illumination conditions, the collected image has a longer duration of tailing phenomenon; shortens the length of the image acquisition device The length of time to acquire images with smearing.

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] The image acquisition device usually has an automatic exposure function. The automatic exposure function enables the image capture 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: shutter, gain and aperture. [0003] In a scene where the light intensity of ambient light gradually decreases (for example, in the evening), if the automatic exposure function of the image capture device is turned on, the method for image capture by the image capture device includes three stages: the first stage: the image capture device detects the gradually decreasing Whether the light intensity reaches the shutter adjustment threshold; if it reaches the shutter adjustment th...

Claims

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Application Information

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Patent Type & Authority Patents(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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