Out-of-focus projection three-dimensional measurement method of color binary fringes

A three-dimensional measurement, binary technology, applied in the field of three-dimensional measurement, can solve the problems of affecting the measurement speed, restricting the projection speed of the projector, etc., achieve the effect of fast three-dimensional measurement speed, improve the accuracy of three-dimensional measurement, and filter out high-order harmonics

Inactive Publication Date: 2014-08-13
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

In the traditional three-dimensional measurement method of colored sinusoidal fringes, since the grayscale of the projected colored sinusoidal fringes is 0-255, the projection speed of the projector is limited within 120 frames per second, which greatly restricts the projection speed of the projector and directly affects the measurement speed

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  • Out-of-focus projection three-dimensional measurement method of color binary fringes
  • Out-of-focus projection three-dimensional measurement method of color binary fringes
  • Out-of-focus projection three-dimensional measurement method of color binary fringes

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Embodiment Construction

[0026] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0027] The present invention works and implements like this, the color binary fringe defocus projection three-dimensional measurement method is characterized in that it is composed of three key parts: the color binary fringe coding principle, the defocus projection system, and the three-dimensional measurement principle.

[0028] 1 Traditional colored sinusoidal stripes

[0029] Among the current multiple color models, the RGB color model is the most practically used one. RGB images are composed of three channels: red (Red), green (Green), and blue (Blue). The traditional three-dimensional measurement method of colored sinuso...

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Abstract

The invention discloses an out-of-focus projection three-dimensional measurement method of color binary fringes. The method involves three key parts including the color binary fringe coding principle, an out-of-focus projection system and the three-dimensional measurement principle. The out-of-focus projection three-dimensional measurement method of color binary fringes has the advantages that first, according to a traditional color sine fringe projection method, the color sine fringe gray level of projection of a traditional method projector is distributed between 0 and 255, the projection speed is limited within 120 frames / s, and the measurement speed is restricted; according to the method, because the projection color binary fringes only have the two gray levels of 0 and 255, the projection speed of a projector is greatly increased, and thus three-dimensional measurement speed is greatly increased; second, the three-step phase shift method is adopted, three-dimensional measurement can be achieved with only one set of color binary fringes, and the method has high three-dimensional measurement speed; third, the method has very high practical value in high-speed and high-precision three-dimensional measurement.

Description

technical field [0001] The invention relates to a three-dimensional measurement method, in particular to a three-dimensional measurement method for defocused projection of color binary fringes. Background technique [0002] Fringe projection profilometry is of great significance in three-dimensional measurement due to its advantages of non-contact, full-field measurement, fast measurement speed and easy information processing. 3D measurement systems such as figure 1 As shown, it includes DLP projector 1, high-speed CMOS2, workstation 3, measurement support 4 and reference plane 5; DLP projector 1 and high-speed CMOS2 are placed on measurement support 4; DLP projector 1 and high-speed CMOS2 are respectively connected to workstation 3 by wires ; The object 6 to be measured is placed on the reference plane 5 ; the workstation 3 includes an image acquisition card, projection software, and measurement software. The DLP projector 1 projects the stripes with characteristic inform...

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Application Information

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IPC IPC(8): G01B11/25
Inventor 伏燕军王志刚江光裕张海林
Owner NANCHANG HANGKONG UNIVERSITY
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