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Focusing search method and system

A technology of focused search and focused position, applied in the field of focused search method and its system, can solve the problems of slow process of focused search method and achieve the effect of shortening the running time

Active Publication Date: 2020-03-24
RWD LIFE SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An embodiment of the present invention provides a focused search method, aiming to solve the problem of slow process of the focused search method in the prior art

Method used

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  • Focusing search method and system
  • Focusing search method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 It is a flow chart of the focus search method provided by Embodiment 1 of the present invention. like figure 1 As shown, the method includes:

[0030] Step S101: the first thread controls the lens group to move, and controls the lens group to capture images at a preset first time interval during the movement.

[0031] In the embodiment of the present invention, the first thread controls the lens group to move in one direction and capture images during the movement, and the lens group does not need to be stopped and restarted midway. The lens group shoots at a preset first time interval during the movement to obtain several images, for example, the first time interval is 400ms. In the case that the lens group moves continuously, the interval of taking images is time interval instead of distance interval, which simplifies thread control.

[0032] Step S102: the first thread puts the captured image into the first image queue.

[0033] In the embodiment of the...

Embodiment 2

[0041] As an embodiment of the present invention, the asynchronous equidistant search method such as image 3 As shown, the method includes:

[0042] Step S301: the first thread controls the lens group to move, and controls the lens group to capture images at a preset first time interval during the movement.

[0043] Step S301 is the same as step S101 in Embodiment 1, and will not be repeated here.

[0044] Step S302: the first thread puts the captured images into the first image queue until the first image queue is full.

[0045] In the embodiment of the present invention, the first thread moves the lens group to capture images in one direction, and the lens group does not need to stop halfway until the first image queue is full before stopping.

[0046] Step S303: The second thread acquires the captured images from the first image queue, calculates the sharpness of all images in the first image queue, determines the first serial number of the image with the highest resolut...

Embodiment 3

[0064] As an embodiment of the present invention, the asynchronous hill climbing method such as Figure 5 As shown, the method includes:

[0065] Step S501: the first thread controls the lens group to move, and controls the lens group to capture images at a preset first time interval during the movement.

[0066] Step S502: the first thread puts the captured image into the first image queue.

[0067] Steps S501 and S502 are the same as steps S101 and S102 in Embodiment 1, and will not be repeated here.

[0068] Step S503: The second thread acquires the captured images from the first image queue, and sequentially calculates the sharpness of the images in the first image queue. The third sequence number of the image is sent to the first thread as the first stop message.

[0069] In the embodiment of the present invention, the second thread sequentially calculates the sharpness of the images in the first image queue. When the definition of the image decreases, that is, when t...

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Abstract

The invention provides a focusing search method and system, and the method comprises the steps: a first thread controlling a lens group to move, and controlling the lens group to shoot an image at a preset first time interval in a moving process; the first thread putting the shot images into a first image queue; the second thread obtaining the shot images from the first image queue and calculatingthe definition of the images; and the first thread determining a focusing position according to the definition. According to the invention, lens group movement, image shooting and image analysis arerespectively carried out in different threads in a parallel manner. The first thread controls the lens group to shoot images in the moving process, and the second thread analyzes the images in the image queue, so that image shooting and image analysis are carried out at the same time, the lens group does not need to be frequently stopped and started, and the operation time of the focusing search method is greatly shortened.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a focus search method and system thereof. . Background technique [0002] In the automatic focusing process, the focus search method is an important component. Common focusing search methods include equidistant search method and hill climbing method. The focusing process of the equidistant search method is: take several images at equal intervals, select the image with the highest definition, the position where the image is taken is the focus position, and move the lens group to the focus position to complete the focus process. After searching for a focus position, the distance between the captured images can be reduced, and the above process can be repeated to obtain a focus position with higher precision. The focusing process of the hill-climbing method is as follows: the lens group shoots and analyzes the image at a certain distance along the set direction, and when the monot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232
CPCH04N23/675H04N23/673
Inventor 冀高
Owner RWD LIFE SCI
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