Patent
Rapid three-dimensional scanning method and system applicable to complex object surfaces
Fang Wenpiao,Wu Zhengqiang +1 more
- 03 Apr 2018
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TL;DR: In this paper, a rapid three-dimensional scanning method and system applicable to complex object surfaces is presented, which includes the steps: setting exposure time, gains or apertures of a plurality of cameras according to color information of the detected object surfaces; controlling a projector to project horizontal and vertical stripes to detected objects; simultaneously acquiring projection images on the detected objects by the cameras to generate a phase diagram; searching corresponding points in the phase diagram based on the projector to perform 3D reconstruction.
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Abstract: The invention discloses a rapid three-dimensional scanning method and system applicable to complex object surfaces. The method includes the steps: setting exposure time, gains or apertures of a plurality of cameras according to color information of the detected object surfaces; controlling a projector to project horizontal and vertical stripes to detected objects; simultaneously acquiring projection images on the detected object surfaces by the cameras to generate a phase diagram; searching corresponding points in the phase diagram based on the projector to perform three-dimensional reconstruction. According to the rapid three-dimensional scanning method and system applicable to the complex object surfaces, various complex object surfaces can be rapidly scanned without developing agents, three-dimensional online detection requirements are met, one time of projection and reconstruction can be realized without adding hardware equipment, scanning effects are better, and speed and precision are higher.
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Citations
Patent
Exposure adjustment method and device, computer equipment and storage medium
Huang Leijie
- 22 Mar 2019
TL;DR: In this paper, an exposure adjustment method and device, computer equipment and a storage medium are used to improve the signal-to-noise ratio (SNO) of a flat scanning image.
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Patent
Multi-view three-dimensional measurement system and method
Yang Shuming,Fenghe Zheng,Hu Pengyu,Liu Yong +3 more
- 09 Oct 2020
TL;DR: In this article, a multi-view three-dimensional measurement system and method is presented. The system comprises a projector, a peripheral camera, a beam splitting plate and a color camera; the peripheral camera adopts an inclined image plane structure to meet the depth-of-field requirement; and the color camera is used for restoring object color information.
Patent
Three-dimensional scanning device and scanning method suitable for dark surface
Du Fangjun,Zhi Hui,Liu Yong +2 more
- 17 Jan 2020
TL;DR: In this paper, a three-dimensional scanning device and method suitable for a dark surface is presented, which consists of a base, the base is provided with a rotary objective table, the rotaryobjective table is used for bearing a measured workpiece and assisting in point cloud splicing, the outer side of the rotating objective table was provided with an annular lighting source and a step surface which are fixedly connected with the base, and marking points are irregularly pasted on the step surface.
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Patent
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Jin Zhou,Xiaobo Zhao +1 more
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TL;DR: In this article, a combined three-dimensional digital imaging method of digital speckle projection and phase measuring profilometry is proposed, which consists of the following steps: (1), a random digital specckle pattern is projected onto an object and acquired through two cameras on left and right sides.
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Patent
Vision measuring method for projecting multiple frequency grating object surface tri-dimensional profile
Bo Zhou
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TL;DR: In this paper, the authors proposed a method for 3D contour measurement on object surface using gratings with different frequencies to obtain multiple phase diagrams and then using frequency synthesis method to obtain high-precision unwrapped phase.
22
Patent
Method for acquiring object three-dimensional image by optical three-dimensional sensing
Yong Li,Hongzhen Jin,Hui Wang +2 more
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TL;DR: In this article, a method for acquiring a 3D image of an object through optical 3D sensing based on the illumination of structured light is proposed, which can obtain the high-density three-dimensional measuring result, but simultaneously obtain the texture of the object, and the object can be measured as long as enough coding regions are projected on the isolated object.
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Patent
Fringe projection profilometry-based efficient phase position-three-dimensional mapping method and system
Peng Xiang,Zewei Cai,Liu Xiaoli +2 more
- 31 May 2017
TL;DR: In this paper, a fringe projection profilometry-based efficient phase position-three-dimensional mapping method is proposed for the technical field of optical 3D digital imaging and the method comprises the following steps: S1, protecting fringe sequence to the surface of a to-be-detected object by the projection device, acquiring a deformed fringe graph modulated by the to be-detection object by imaging device, and calculating according to the deformed graph to obtain the phase positions of all the pixel points on the image of the imaging device; and S2, finding
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