Real-time interactive projection system based on infrared structured-light method

2012 ◽  
Author(s):  
Xiaorui Qiao ◽  
Qian Zhou ◽  
Kai Ni ◽  
Liang He ◽  
Guanhao Wu ◽  
...  
Keyword(s):  
Real Time ◽  
Structured Light ◽  
Projection System

Surface Reconstruction of Microscale Objects Based on Grid-Patterned Structured-Light Measurements

2021 ◽  
pp. 1-21
Author(s):  
Yuezong Wang ◽  
Jiqiang Chen ◽  
Youfan Peng
Keyword(s):  
Real Time ◽  
Surface Reconstruction ◽  
Metal Surfaces ◽  
Structured Light ◽  
Three Dimensional ◽  
Shape Measurement ◽  
Grid Node ◽  
Projection System ◽  
3D Shape ◽  
3D Shape Measurement

A structured-light projection system was designed for microscale objects with surface heights that ranged from tens to hundreds of microns. The system was composed of a universal projector and microscope system that supported editing the attributes of structured-light patterns in real-time and was capable of projecting microscale patterns. On this basis, reconstructing the metal surfaces of microscale objects based on grid patterns of structured light was investigated, the internal and external parameters of microscope vision and projection systems were calibrated, and an image algorithm for grid-node detection was designed. The results indicated that the proposed method successfully reconstructed the three-dimensional (3D) surface of microscale objects, and the reconstruction results were consistent with the original surfaces. With 95% confidence, the reconstruction precision in the X- and Y-directions was approximately ±4.0 μm and in the Z-direction was approximately ±7.5 μm. The designed system and the proposed method were suitable for 3D-shape measurement of microstructures in microscopic fields and can be adapted to meet a broader range of applications, as compared to current methods.

Real-time tracking of surfaces with structured light

1995 ◽  
Vol 13 (7) ◽  
pp. 585-591 ◽  
Author(s):  
Peter Lindsey ◽  
Andrew Blake
Keyword(s):  
Real Time ◽  
Structured Light ◽  
Real Time Tracking

Real-Time Sensing of Sag Geometry During GTA Welding

1997 ◽  
Vol 119 (2) ◽  
pp. 151-160 ◽  
Author(s):  
Y. M. Zhang ◽  
R. Kovacevic
Keyword(s):  
Real Time ◽  
Vision System ◽  
Structured Light ◽  
Gta Welding ◽  
Seam Tracking ◽  
Image Processing Algorithm ◽  
3D Vision ◽  
Full Penetration ◽  
Laser Stripe ◽  
Penetration Control

Seam tracking and weld penetration control are two fundamental issues in automated welding. Although the seam tracking technique has matured, the latter still remains a unique unsolved problem. It was found that the full penetration status during GTA welding can be determined with sufficient accuracy using the sag depression. To achieve a new full penetration sensing technique, a structured-light 3D vision system is developed to extract the sag geometry behind the pool. The laser stripe, which is the intersection of the structured-light and weldment, is thinned and then used to acquire the sag geometry. To reduce possible control delay, a small distance is selected between the pool rear and laser stripe. An adaptive dynamic search for rapid thinning of the stripe and the maximum principle of slope difference for unbiased recognition of sag border were proposed to develop an effective real-time image processing algorithm for sag geometry acquisition. Experiments have shown that the proposed sensor and image algorithm can provide reliable feedback information of sag geometry for the full penetration control system.

Gaze and Motion-aware Real-Time Dome Projection System

2019 ◽  
Author(s):  
Steve Grogorick ◽  
Matthias Ueberheide ◽  
Jan-Philipp Tauscher ◽  
Paul Maximilian Bittner ◽  
Marcus Magnor
Keyword(s):  
Real Time ◽  
Projection System

The Design of Real-Time Digital Clothing Projection System

2019 ◽  
Author(s):  
Hong-Nien Chen ◽  
Chuan-Feng Chiu ◽  
Timothy K. Shih ◽  
Chi-Yen Lin ◽  
Fitri Utaminingrum ◽  
...  
Keyword(s):  
Real Time ◽  
Projection System

Real-Time Projection Mapping Using High-Frame-Rate Structured Light 3D Vision

2015 ◽  
Vol 8 (4) ◽  
pp. 265-272 ◽  
Author(s):  
Jun CHEN ◽  
Takashi YAMAMOTO ◽  
Tadayoshi AOYAMA ◽  
Takeshi TAKAKI ◽  
Idaku ISHII
Keyword(s):  
Real Time ◽  
Structured Light ◽  
Frame Rate ◽  
3D Vision ◽  
Projection Mapping ◽  
High Frame Rate ◽  
Time Projection
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