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A method for carrying out three dimensional tracking measurement on a moving object through utilizing two dimensional coding

A two-dimensional coding and three-dimensional tracking technology, which is used in measuring devices, optical devices, image data processing, etc., to achieve the effect of broad application prospects

Inactive Publication Date: 2014-02-19
SHANGHAI WEITA DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for three-dimensional tracking and measurement of moving objects with two-dimensional codes, which solves the problem of three-dimensional contour tracking and measurement of moving objects, especially moving human bodies

Method used

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  • A method for carrying out three dimensional tracking measurement on a moving object through utilizing two dimensional coding
  • A method for carrying out three dimensional tracking measurement on a moving object through utilizing two dimensional coding
  • A method for carrying out three dimensional tracking measurement on a moving object through utilizing two dimensional coding

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Effect test

Embodiment 1

[0039] First, use computer graphics software to follow the figure 2 The arrangement order of the two-dimensional code shown is to make a color two-dimensional code map with squares of red, green and blue, and output it with a color printer to make a two-dimensional code map. The side length of the square is 10mm, and the distance between each square The spacing is also 10mm. Attach the two-dimensional coding map to a cylinder with a diameter of 135mm and a height of 200mm. with two cameras according to image 3 The devices shown constitute the measurement system. The two cameras are placed at positions 1 and 2 respectively, and they are at the same level. The video output signal is sent to the computer through the image acquisition card, the resolution of the image acquisition card is 688x516 pixels, 24-bit true color mode. The lighting configuration should try to make the left and right lighting evenly, so as to reduce the shadow on the measured object.

[0040] Before ...

Embodiment 2

[0044] The measurement system remains constant after being calibrated in Example 1, and we perform three-dimensional measurement on the human body model. Use squares of red, green, and blue colors to follow the figure 2 The sequence shown is pasted on the surface of the mannequin, and the mannequin is measured with the measuring system. Figure 7 , Figure 8 are the sampling images obtained by the left and right cameras, respectively. Through computer program processing, the spatial coordinates of the four corner points of each square can be obtained. According to the spatial points measured by the experiment, three-dimensional reconstruction is carried out in the computer with VRML2.0. Figure 9 It is the result of three-dimensional reconstruction in the computer from the three-dimensional measurement value of the human body model.

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Abstract

The invention relates to the technical field of optical three dimensional outline measurement, and discloses a method for carrying out three dimensional tracking measurement on a moving object through utilizing two dimensional coding. Two video cameras are utilized to carry out image acquisition simultaneously on a measured object, wherein the two CCD video cameras maintain a certain distance therebetween. The three dimensional measurement is carried out through utilizing a principle of binocular stereoscopic visions of human eyes, and geometrical shapes which are of different colors and have a specific sequence are utilized to mark the surface of the measured object in order that matching points between images acquired by the two CCD video cameras are easy to find. According to a parallax of a same matching point in two images, the position of the point in three dimensional space is calculated. According to the method for carrying out the three dimensional tracking measurement on the moving object through utilizing the two dimensional coding of the invention, tracking measurement on behaviors of human bodies can be carried out. The method for carrying out the three dimensional tracking measurement on the moving object through utilizing the two dimensional coding has a wide application prospect in fields such as three dimensional animation making, athlete selecting and training.

Description

technical field [0001] The invention relates to the technical field of optical three-dimensional profile measurement. It is a method for three-dimensional tracking and measurement of moving objects with two-dimensional codes. Background technique [0002] Using the principle of binocular stereo vision for three-dimensional observation and measurement has been extensively researched and applied. Many three-dimensional observation and measurement methods have been proposed. Chinese patent CN1010466A discloses that a series of light strip patterns with single-value codes are projected onto the target at a certain inclination angle with the optical axis of the camera, and the pixels in the camera receive the reflections reflected by the target. Encoded optical signal. With appropriate selection and scaling of the coordinate system, and associated optical stripe encoding, for each pixel element, by simply subtracting the pixel from the binary encoded optical signal reflected to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25G06T7/00
Inventor 袁桦张玉
Owner SHANGHAI WEITA DIGITAL TECH
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