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Three-dimensional scanning method for high-frequency two-value strip

A binary fringe and three-dimensional scanning technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of slow speed and achieve high-precision results

Active Publication Date: 2015-06-03
宋展
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] From the point of view of the existing 3D scanning technology, laser 3D scanning and projection structured light 3D scanning technology are the main technologies. The laser 3D scanning system projects laser lines or dot arrays, captures the projected laser features with a camera, and restores 3D through triangulation. Depth information, but the main disadvantage of this point-by-point and line-by-line scanning method is the slow speed; in the projector-based structured light 3D scanning system, it uses structured light coding technology to realize one-time measurement of the entire surface, which has a fast speed And the obvious advantages of high precision, so the projection-based structured light 3D scanning technology has become the current mainstream technology

Method used

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  • Three-dimensional scanning method for high-frequency two-value strip
  • Three-dimensional scanning method for high-frequency two-value strip
  • Three-dimensional scanning method for high-frequency two-value strip

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Embodiment Construction

[0041] figure 1 It is a schematic diagram of the specific implementation of the present invention, and the main implementation components include

[0042] Projection equipment: commonly used projection equipment such as DLP, LCOS, and LCD can be used as the output module of the structured light system;

[0043] Camera: for synchronous shooting of projected patterns;

[0044] Control module: it can be a control module such as FPGA or DSP, and its main function is to output the pre-stored binary pattern to the projector module through the video interface (which can be HDMI, VGA or other video interface), and output each frame At the same time as the picture is displayed, a trigger signal is sent to the camera, and the camera synchronously captures each frame of image projected by the projector;

[0045] The data processing unit acquires the captured image from the camera, decodes the structured light image and restores the three-dimensional information of the object through th...

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Abstract

The invention relates to a three-dimensional scanning method for a high-frequency two-value strip. The method comprises the steps: using structured light 3D scanning to obtain parameters inside and outside a projector and a camera and carry out overall-situation contrast estimation at first, then locating sub pixels based on the edge of the two-value displacement strip and partially encoding the high-frequency two-value strip and finally carrying out partial periodical confusion elimination and three-dimensional reconstruction. In the encoding aspect, the black-white edge of the two-value strip is utilized as the encoding characteristic, and accordingly the obvious robustness advantage is achieved. In the decoding aspect, a virtual antiphase image generating method is utilized, the number of total projection encoding patterns is reduced, the high-accuracy location of sub pixels of encoding characteristic points is achieved by generating the virtual antiphase displacement patterns and combining a sine fitting intersection strategy, usual projection equipment is utilized, the cost is reduced, and the method is easy to implement. In existing DLP projection equipment, higher projection frequency can be obtained by outputting the two-value strip, and accordingly high-speed three-dimensional scanning process is easy to achieve.

Description

technical field [0001] The invention relates to the related fields of computer vision and optical three-dimensional measurement, in particular to a three-dimensional scanning method of high-frequency binary fringes. Background technique [0002] The rapid development of 3D scanning technology has been applied to many fields and industries such as industrial inspection, design, animation and film special effects production, 3D display, virtual surgery, and reverse engineering. [0003] From the point of view of the existing 3D scanning technology, laser 3D scanning and projection structured light 3D scanning technology are the main technologies. The laser 3D scanning system projects laser lines or dot arrays, captures the projected laser features with a camera, and restores 3D through triangulation. Depth information, but the main disadvantage of this point-by-point and line-by-line scanning method is the slow speed; in the projector-based structured light 3D scanning system,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
Inventor 宋展程志全
Owner 宋展
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