Automatic exposure method, exposure device, camera and computer readable storage medium

An automatic exposure, computer technology, applied in the field of image processing, to improve the effect of motion blur in the picture
CN113596342APending Publication Date: 2021-11-02SHENZHEN ARASHI VISION CO LTD
1 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENZHEN ARASHI VISION CO LTD
Publication Date
2021-11-02

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an automatic exposure method. The method comprises the following steps: S1, acquiring current frame image data shot by a shooting device according to current exposure parameters, and calculating the brightness Ya of a current frame; S2, calculating a target exposure EVb according to the brightness Ya of the current frame, the current exposure EVa and the target brightness Yb; S3, selecting a corresponding exposure parameter table according to the motion state of the shooting device; S4, determining a target exposure parameter according to the target exposure EVb and the selected exposure parameter table; S5, updating the exposure parameter of the shooting device to the target exposure parameter and returning to the step S1, wherein the current exposure EVa is calculated by a current exposure parameter of the shooting device, and the target brightness Yb is obtained by calculating an exposure index Na by the current exposure EVa and then combining the exposure index Na with a brightness lookup table. According to the invention, the problems of motion blur of a picture caused by shooting in a motion state and serious noisy points of the picture caused by shooting in a static state of the shooting device are improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present application relates to the technical field of image processing, in particular to an automatic exposure method, an exposure device, a camera, and a computer-readable storage medium. Background technique

[0002] The purpose of automatic exposure is to realize the recognition of brightness levels in different lighting conditions and different scenes, and adjust the exposure parameters in real time, so that the captured video or image appears to be of appropriate brightness to the human eye. To achieve this goal, adjust the lens iris aperture, sensor exposure time, sensor analog gain and digital gain. This adjustment process is called Auto Exposure.

[0003] In the existing technical solutions, in indoor or low-light environments, the shutter time is often set longer to increase the brightness of the picture and reduce noise. However, when recording a moving video, an excessively long shutter time will cause Severe motion blur, smearing, etc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More