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A High-speed Method for Extracting the Center Point of Circular Image

An image and circle technology, applied in the field of high-speed extraction of the center point of a circular image, can solve the problems of low efficiency and unsuitable for high-speed motion, and achieve the effect of fast speed, fast processing speed, and simple and clear method.

Active Publication Date: 2017-05-31
BEIJING DULIANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although traditional edge extraction and contour extraction can adapt to various environments and shapes (circle, rectangle, etc.), but the efficiency is low and it is not suitable for high-speed motion

Method used

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  • A High-speed Method for Extracting the Center Point of Circular Image
  • A High-speed Method for Extracting the Center Point of Circular Image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A motion capture method for a high-speed moving human body, mainly comprising:

[0047] a) Fix the reflective marking ball with high brightness directional reflection ability to 850nm infrared rays on the surface of the joint points of the extremities of the moving human body; place the moving human body fixed with the reflective marking ball within the shooting range of the imaging lens;

[0048] b) An 850nm infrared light source is arranged around the imaging lens, and an 850nm filter is built into the imaging lens to illuminate the moving body with 850nm infrared rays. During the high-speed movement of the moving body, the image is continuously imaged through the imaging lens, and the obtained image contains the reflective logo ball. Circular image; the capture device where the imaging lens is located has a built-in imaging chip for controlling imaging and an FPGA hardware module for controlling image processing;

[0049] c) Each frame of image obtained in b) is dire...

Embodiment 2

[0053] A motion capture method for a high-speed moving object, mainly comprising:

[0054] a) fixing the spherical reflective mark at a predetermined position on the surface of the moving object; placing the moving object fixed with the reflective mark within the shooting range of the passive optical motion capture system;

[0055] The spherical reflective mark has a high-brightness directional reflection ability to infrared rays with a wavelength of 800-850nm;

[0056] Such as figure 1 As shown, the passive optical motion capture system is composed of 6-8 passive optical motion capture devices A, POE switch B and main control computer C; as figure 2 As shown, the passive optical motion capture device includes an illumination light source assembly 1, an optical lens 3, and a control cabin 3; the illumination light source assembly 1 includes an LED lamp 11 composed of more than five LED lamp beads and a control circuit board 12 for the light source, LED lamp 11 is arranged a...

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PUM

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Abstract

Provided is a method for rapidly determining a central point of a circular image, comprising: scanning in parallel pixels located within the range of a circular image line by line, and recording the number of pixels scanned in each line; comparing the numbers of pixels scanned in each line so as to obtain a line L mam having the maximum number of pixels; and calculating a midpoint of the found L max, said point being the central point of the circular image. The method for determining a central point of a circular image is simple, clear, targeted, and fast. Further provided is a method for capturing a motion of an object moving at a high speed on the basis of the method for determining a central point of a circular image, having an image processing speed tens of times faster than the prior art, and achieving motion capture of an object moving at a high speed.

Description

technical field [0001] The invention belongs to the technical fields of digital image processing and machine vision, and relates to a method for extracting the center point of a circular image at high speed. Background technique [0002] Simply put, machine vision is the use of machines instead of human eyes for measurement and judgment. Machine vision usually converts the captured target into an image signal through an image capture device, and then performs image processing to obtain a digital signal of the shape information of the captured target. At present, machine vision is being more and more widely used in various industries related to people's life and production. It can be said that as long as it is a task that cannot be completed by artificial vision, it can be completed by machine vision. [0003] The acquisition and analysis of motion data of people and objects in motion has become an important topic in the application of machine vision in recent years. By sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/60
CPCG06T7/60
Inventor 孟杰
Owner BEIJING DULIANG TECH CO LTD