A 3D Scanning Method of High Frequency Binary Fringe

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 perspective of existing 3D scanning technologies, laser 3D scanning and projected structured light 3D scanning are the main technologies. The laser 3D scanning system captures the projected laser features with a camera by projecting a laser line or dot matrix, and recovers 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, the struct...

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

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