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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

Pending Publication Date: 2021-11-02
SHENZHEN ARASHI VISION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide an automatic exposure method, an exposure device, a camera and a computer-readable storage medium, aiming to solve at least some of the defects of the existing automatic exposure method

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 Shown is a flowchart of the automatic exposure method in this embodiment, including the following steps.

[0035] S1: Obtain the image data of the current frame captured by the photographing device according to the current exposure parameters and calculate the brightness Ya of the current frame.

[0036] In this embodiment, the photographing device may be an electronic device with a photographing function such as a sports camera, a mobile phone, and a video camera. After the image data of the current frame is acquired, the luminance values ​​of each pixel in the current frame can be counted, and then the average value of the luminance values ​​of each pixel can be used as the luminance Ya of the current frame.

[0037] In a specific solution of this embodiment, step S1 includes the following sub-steps.

[0038] S101: Acquire current frame image data captured by a photographing device according to current exposure parameters.

[0039] The current fram...

Embodiment 2

[0075] Such as Figure 10 As shown, this embodiment discloses an automatic exposure device, which includes: an acquisition module, which acquires a frame of image data captured by the shooting device according to the current exposure parameters and calculates the brightness Ya of the current frame; The exposure EVa, the brightness Ya of the current frame and the target brightness Yb calculate the target exposure EVb; the selection module is used to select the corresponding exposure parameter table according to the motion state of the shooting device; the determination module is used to select according to the target exposure EVb and the selected The exposure parameter table determines the target exposure parameter; the update module is used to update the exposure parameter of the shooting device to the exposure parameter of the next frame; wherein, the current exposure EVa is obtained by calculating the current exposure parameter of the shooting device, and the target brightnes...

Embodiment 3

[0078] Such as Figure 11 As shown, this embodiment discloses a camera, which includes a processor and a memory, where a computer program is stored on the memory, and the computer program is used to implement the automatic exposure method in Embodiment 1 when executed by the processor.

[0079] Those skilled in the art know that the camera in this embodiment also includes necessary components of the camera such as a lens and an ISP.

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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.

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

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Application Information

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IPC IPC(8): H04N5/235H04N5/225H04N5/357
CPCH04N23/55H04N23/54H04N23/741H04N23/71H04N23/73H04N25/60
Inventor 谭坤郭奕滨
Owner SHENZHEN ARASHI VISION CO LTD
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