High-precision texture mapping on 3D free-form objects

2006 ◽  
Vol 89 (9) ◽  
pp. 24-32 ◽  
Author(s):  
Yuya Iwakiri ◽  
Toyohisa Kaneko
Keyword(s):  
High Precision ◽  
Texture Mapping ◽  
Free Form

scholarly journals Establishment and Application of Hospital BIM Based on Point Cloud and Image Fusion for Infectious Disease (Novel Corona Virus Pneumonia)

CONVERTER ◽  
2021 ◽  
pp. 46-52
Author(s):  
Guizhen He, Jun Yang, Qixiang Nie
Keyword(s):  
Infectious Disease ◽  
High Precision ◽  
Point Cloud ◽  
Texture Mapping ◽  
Hospital Infection ◽  
Infectious Disease Hospital ◽  
The Real ◽  
Processing Level ◽  
Disease Hospital ◽  
Whole Life Cycle

Since neither a single high-precision 3D coordinate laser point cloud nor a oblique image of high-precision spectral information can make the computer understand the data as human, in order to accurately and completely understand the object in the real world, in this paper, the fusion of the point cloud and the oblique image is studied for the understanding and application of the real object buildings by establishing a BIM model. Firstly, point cloud data and image data are acquired by different data acquisition methods. Laser point cloud and oblique image are fused by installation parameters so that geometric elements are consistent and benchmark is unified. Processing level is not limited to element level only, so as to ensure the integrity of information, and the fused mutual information remains consistent in scale, texture and direction. Secondly, under the condition of space-time synchronization, the relationship between point cloud and image in geometric space is established, and the alternating "energy transfer" is used for shape prediction and visual filling by matching under texture mapping constraints to enhance the semantic information of the 3D scene. Finally, a 3D building information model is established. Using the experimental results to track the whole life cycle (design, construction, operation) in real time saves the cost of building rework, reduces the building cycle, and improves the building accuracy. Especially based on BIM during Novel Coronavirus Pneumonia: analyze hospital space resource management and elastic function; construct medical unit model of infectious disease hospital; simulate and optimize medical process in infectious disease hospital; rapidly construct prefabricated infectious disease emergency hospital; simulate hospital infection path and dynamics; the auxiliary design and construction of infectious disease treatment in existing hospitals; The monitoring analysis and automatic control of hospital infection safety operation.

The Free-Form Surface Five-Axis Machining Global Interference Detection and Adjustment of Cutter Shaft

2011 ◽  
Vol 393-395 ◽  
pp. 1550-1553
Author(s):  
Peng Cheng Wu ◽  
Fang Chen Xia ◽  
Hai Ning Tu
Keyword(s):  
Surface Structure ◽  
High Precision ◽  
High Efficiency ◽  
Free Form ◽  
Interference Detection ◽  
Tool Interference ◽  
Free Form Surface ◽  
Five Axis ◽  
Global Surface ◽  
Interference Problems

Proposed a construction method of visual cone, to solve the surface 5-axis NC machining tool interference problems with the surface. At any point on the surface structure the visual cone area, according to visual cone determine whether the global tool interference with surface, and correct the tool spindle of interference cutter, solved the global surface and tool interference problems successfully. The application shows, this method is of high efficiency, high precision.

High precision measurements of the free form mirror geometries

2017 ◽  
Author(s):  
Denis Dontsov ◽  
Ilko Rahneberg ◽  
Wolfgang Pöschel ◽  
Walter Schott
Keyword(s):  
High Precision ◽  
Precision Measurements ◽  
Free Form

High precision free-form optics and application to soft x-ray mirrors

2020 ◽  
Author(s):  
Takehiro Kume ◽  
Kentarou Hiraguri ◽  
Yoichi Imamura ◽  
Hiroaki Miyashita ◽  
T. Mukoda ◽  
...  
Keyword(s):  
High Precision ◽  
Free Form ◽  
X Ray

Texture mapping on free-form surfaces immune to camera positioning errors

2002 ◽  
Vol 33 (13) ◽  
pp. 1-10
Author(s):  
Yuuya Iwakiri ◽  
Yuuichi Omori ◽  
Toyohisa Kaneko
Keyword(s):  
Texture Mapping ◽  
Free Form ◽  
Positioning Errors ◽  
Free Form Surfaces

Processing Flow of Optical Fabrication for Correcting Lenses

2007 ◽  
Vol 24-25 ◽  
pp. 117-124
Author(s):  
Yun Zhang ◽  
Jing Feng Zhi
Keyword(s):  
High Precision ◽  
Spherical Shape ◽  
Measuring Method ◽  
Free Form ◽  
Optical Fabrication ◽  
Rotation Axes ◽  
Precision Measuring ◽  
Aspheric Lenses ◽  
Axes Of Symmetry ◽  
Processing Flow

This paper presents the processing flow and results of optical fabrication for an optical correcting lens with a free-form surface, namely a free-form lens. Because a correcting lens has no rotation axes of symmetry and its surface cannot be expressed by a continuity equation, its processing technology is different with that of general aspheric lenses. The correcting lens was firstly formed from a glass workblank with flat face using diamond abrasion wheel with spherical shape, and then loose abrasive lapped and polished with oblique axis spherical tools to decrease the surface roughness and increase the surface accuracy based on the measuring result after forming. At the lapping and polishing stages, two processing methods are employed. One is to control the processing pressure, and the other is based on dwell time. Since high precision fabrication is closely related with high precision measuring, this paper also presents a high precision non-contact optical measuring method based on image transforming for correcting lenses. The effectiveness of the processing flow and technology is confirmed by an experiment in which a workblank is processed into a satisfying correcting lens.

Isometric Texture Mapping for Free-form Surfaces

1997 ◽  
Vol 16 (5) ◽  
pp. 247-256 ◽  
Author(s):  
Nur Arad ◽  
Gershon Elber
Keyword(s):  
Texture Mapping ◽  
Free Form ◽  
Free Form Surfaces
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