Dr. Chihhsiong Stone Shih Profile

Dr. Chihhsiong Stone Shih

at Tunghai Univ

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Author

Publications (7)

SPIE Journal Paper | 2 March 2012

View planning and mesh refinement effects on a semi-automatic three-dimensional photorealistic texture mapping procedure

Chihhsiong Shih, Yuanfan Yang

OE, Vol. 51, Issue 02, 021108, (March 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.2.021108

KEYWORDS: 3D modeling, Volume rendering, 3D image processing, Cameras, Ultraviolet radiation, 3D acquisition, Optical engineering, Image processing, Buildings, Reconstruction algorithms

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SPIE Journal Paper | 1 February 2009

Integration of a vision-based tracking platform, visual instruction, and error analysis models for an efficient billiard training system

Chihhsiong Shih, Pao-Ann Hsiung, Chieh-Hao Wan, Chorng-Shiuh Koong, Tang-Kun Liu, Yuanfan Yang, Chu-Hsing Lin, William Cheng-Chung Chu

OE, Vol. 48, Issue 02, 027202, (February 2009) https://doi.org/10.1117/12.10.1117/1.3083379

KEYWORDS: Visualization, Optical tracking, Tolerancing, Error analysis, Visual analytics, Visual process modeling, Calibration, Optical engineering, Human-machine interfaces, Motion analysis

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A billiard ball tracking system is designed to combine with a visual guide interface to instruct users for a reliable strike. The integrated system runs on a PC platform. The system makes use of a vision system for cue ball, object ball and cue stick tracking. A least-squares error calibration process correlates the real-world and the virtual-world pool ball coordinates for a precise guidance line calculation. Users are able to adjust the cue stick on the pool table according to a visual guidance line instruction displayed on a PC monitor. The ideal visual guidance line extended from the cue ball is calculated based on a collision motion analysis. In addition to calculating the ideal visual guide, the factors influencing selection of the best shot among different object balls and pockets are explored. It is found that a tolerance angle around the ideal line for the object ball to roll into a pocket determines the difficulty of a strike. This angle depends in turn on the distance from the pocket to the object, the distance from the object to the cue ball, and the angle between these two vectors. Simulation results for tolerance angles as a function of these quantities are given. A selected object ball was tested extensively with respect to various geometrical parameters with and without using our integrated system. Players with different proficiency levels were selected for the experiment. The results indicate that all players benefit from our proposed visual guidance system in enhancing their skills, while low-skill players show the maximum enhancement in skill with the help of our system. All exhibit enhanced maximum and average hit-in rates. Experimental results on hit-in rates have shown a pattern consistent with that of the analysis. The hit-in rate is thus tightly connected with the analyzed tolerance angles for sinking object balls into a target pocket. These results prove the efficiency of our system, and the analysis results can be used to attain an efficient game-playing strategy.

SPIE Journal Paper | 1 May 2008

Non-uniform surface sampling techniques for three-dimensional object inspection

Chihhsiong Shih, Lester Gerhardt, William Cheng-Chung Chu, Chuhsing Lin, Chih-Hung Chang, Chieh-Hao Wan, Chorng-Shiuh Koong

OE, Vol. 47, Issue 05, 053606, (May 2008) https://doi.org/10.1117/12.10.1117/1.2911721

KEYWORDS: Inspection, Error analysis, Optical engineering, Manufacturing, 3D modeling, 3D vision, Computer science, Information science, 3D metrology, 3D applications

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SPIE Journal Paper | 1 November 2006

Integration of view planning with nonuniform surface sampling techniques for three-dimensional object inspection

Chihhsiong Shih, Lester Gerhardt

OE, Vol. 45, Issue 11, 113602, (November 2006) https://doi.org/10.1117/12.10.1117/1.2385496

KEYWORDS: Inspection, Optical engineering, Visibility, Image processing, Nonuniform sampling, 3D modeling, Manufacturing, Finite element methods, CCD cameras, Optical spheres

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Proceedings Article | 17 January 2005 Paper

Efficient workflows for 3D building full-color model reconstruction using LIDAR long-range laser and image-based modeling techniques

Chihhsiong Shih

Proceedings Volume 5675, (2005) https://doi.org/10.1117/12.586816

KEYWORDS: 3D modeling, Solid modeling, Process modeling, Reconstruction algorithms, Computer aided design, 3D image processing, Clouds, Photogrammetry, LIDAR, Data modeling

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Two efficient workflow are developed for the reconstruction of a 3D full color building model. One uses a point wise sensing device to sample an unknown object densely and attach color textures from a digital camera separately. The other uses an image based approach to reconstruct the model with color texture automatically attached. The point wise sensing device reconstructs the CAD model using a modified best view algorithm that collects the maximum number of construction faces in one view. The partial views of the point clouds data are then glued together using a common face between two consecutive views. Typical overlapping mesh removal and coarsening procedures are adapted to generate a unified 3D mesh shell structure. A post processing step is then taken to combine the digital image content from a separate camera with the 3D mesh shell surfaces. An indirect uv mapping procedure first divide the model faces into groups within which every face share the same normal direction. The corresponding images of these faces in a group is then adjusted using the uv map as a guidance. The final assembled image is then glued back to the 3D mesh to present a full colored building model. The result is a virtual building that can reflect the true dimension and surface material conditions of a real world campus building. The image based modeling procedure uses a commercial photogrammetry package to reconstruct the 3D model. A novel view planning algorithm is developed to guide the photos taking procedure. This algorithm successfully generate a minimum set of view angles. The set of pictures taken at these view angles can guarantee that each model face shows up at least in two of the pictures set and no more than three. The 3D model can then be reconstructed with minimum amount of labor spent in correlating picture pairs. The finished model is compared with the original object in both the topological and dimensional aspects. All the test cases show exact same topology and reasonably low dimension error ratio. Again proving the applicability of the algorithm.

Proceedings Article | 21 March 2000 Paper

Three-dimensional inspection of sculptured surfaces using nonuniform sampling and view planning

Chihhsiong Shih, Lester Gerhardt

Proceedings Volume 3966, (2000) https://doi.org/10.1117/12.380060

KEYWORDS: Inspection, Manufacturing, 3D modeling, Finite element methods, Machine vision, Composites, Computing systems, Computer simulations, 3D vision, 3D applications

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Proceedings Article | 27 March 1995 Paper

Surface sampling techniques for 3D object inspection

Chihhsiong Shih, Lester Gerhardt

Proceedings Volume 2423, (1995) https://doi.org/10.1117/12.205498

KEYWORDS: Inspection, Finite element methods, Manufacturing, Error analysis, Solids, Chemical elements, Statistical modeling, 3D modeling, Computing systems, 3D metrology

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