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Image processing-based dynamic target automatic focusing system

An image processing and automatic zooming technology, applied in focusing device, installation, optics, etc., can solve the problems of low precision, low efficiency, and difficulty in guaranteeing real-time automatic zooming, and achieve the effect of improving efficiency and precision

Inactive Publication Date: 2010-07-21
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

These two methods have the disadvantages of low efficiency and low precision, and it is difficult to ensure real-time automatic zooming

Method used

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  • Image processing-based dynamic target automatic focusing system
  • Image processing-based dynamic target automatic focusing system
  • Image processing-based dynamic target automatic focusing system

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Experimental program
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Embodiment Construction

[0013] Such as figure 1 , 2 Shown, the present invention is made up of zoom lens 1, camera 2, image processing control unit 3, lens drive control circuit 4 and display 5, and zoom lens 1 is used for adjusting the focal length of camera 2, and zoom lens 1 is driven by zoom motor 12 and zoom lens 11 constitute, and zoom motor 12 is connected with zoom lens 11, and zoom motor 12 rotates and just can change the focal length of zoom lens, and zoom motor 12 can be DC electrode or stepper motor; Video camera 2 is used for shooting target image, capturing video The data sensor can be a commonly used camera, or an image acquisition sensor such as a charge-coupled device CCD, CMOS, etc.; the image processing control unit 3 is the core of the system, it accepts the image data from the camera, and divides the target to obtain The imaging size of the target is determined to send a control command to the lens drive control circuit 4 according to the comparison result between the target siz...

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Abstract

The invention is an image processing-based dynamic target auto zooming system, mainly comprising: variable focal lens to regulate focus of camera; camera to shoot target image; image processing control unit to receive image data from the camera and divide the target to obtain image size of the target, and determine to send control command to the lens drive control circuit according to the comparative result of target size and set size; lens drive control circuit connected with the image processing control unit through serial interface and connected with positive and negative control lines of the variable focal lens through two cables and receiving the control command from the image processing control unit to shift the variable focal lens so as to regulate the focus of the camera. And the invention has auto zooming function and advantages of high efficiency and high accuracy.

Description

technical field [0001] The invention relates to an automatic zoom system, in particular to a dynamic target automatic zoom system based on image processing. Background technique [0002] When the camera (CCD, CMOS) shoots a dynamic target, if the focal length of the camera is fixed, the size of the target on the screen will also change with the distance from the target. To maintain the accuracy of measurement, it is necessary to keep the image size of the target within a suitable size range. The current cameras (CCD, CMOS) generally have a manual zoom function. Through manual adjustment, the zoom is performed to control the image size of the target to an appropriate size. [0003] However, when shooting and tracking a high-speed moving target, the distance of the target will change rapidly continuously. The current methods include the following: one is to use manual adjustment, and the other is to calculate the focal length value and control the zoom according to the focal l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/28G03B13/36
Inventor 倪军周进王岱张海清王成刚
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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