Three-dimensional scanning method containing multiple lasers with different wavelengths and scanner

A three-dimensional (3D) scanner, comprising:

• at least two laser projectors, the at least two laser projectors corresponding to at least two different wavelengths;
• at least one camera for capturing a laser pattern projected by the at least two laser projectors onto a surface of a scanned object;
• and
• a processor capable of image recognition and 3D reconstruction,
• wherein
• a spatial position relationship between light planes projected by the at least two laser projectors and the at least one camera is predetermined,
• an output end of the at least one camera is connected to the processor,
• the processor comprises a two-dimensional (2D) image laser contour line extractor, a 3D constructor, and a wavelength switching determiner that selects internal parameters and distortion coefficients of the at least one camera at a selected wavelength, and
• the output end of the at least one camera is connected to the 2D image laser contour line extractor, the 2D image laser contour line extractor is connected to the 3D constructor, and the wavelength switching determiner is connected to the 2D image laser contour line extractor and the 3D constructor.

A three-dimensional (3D) scanning system, comprising:

• a 3D scanner;
• and
• a scanned object,
• the 3D scanner comprising:
• at least two laser projectors, the at least two laser projectors corresponding to at least two different wavelengths,
• at least one camera for capturing a laser pattern projected by the at least two laser projectors onto a surface of the scanned object, and
• a processor capable of image recognition and 3D reconstruction;
• wherein
• a spatial position relationship between light planes projected by the at least two laser projectors and the at least one camera is predetermined,
• an output end of the at least one camera is connected to the processor,
• the processor comprises a two-dimensional (2D) image laser contour line extractor, a 3D constructor, and a wavelength switching determiner that selects internal parameters and distortion coefficients of the at least one camera at a selected wavelength, and
• the output end of the at least one camera is connected to the 2D image laser contour line extractor, the 2D image laser contour line extractor is connected to the 3D constructor, and the wavelength switching determiner is connected to the 2D image laser contour line extractor and the 3D constructor.