Precise perimeter measurement for 3D object with a light-pen vision measurement system |
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| Authors: | Zhao Peng |
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| Institution: | 1. Department of Oral Biology, School of Dentistry, Creighton University, Omaha, NE 68178, United States;2. Department of Chemistry, College of Arts and Sciences, Creighton University, Omaha, NE 68178, United States;3. Premier Dental Products Company, Plymouth Meeting, PA 19462, United States;1. Computer Science and Engineering School, Nanjing University of Science & Technology, Nanjing Jiangsu 210094, China;2. Jiangsu Key Lab of Spectral Imaging and Intelligent Sensing, Nanjing 2010094, China;1. College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, PR China;2. School of Information Science and Technology, Beijing Forestry University, Beijing 100091, PR China;3. Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, Beijing 100083, PR China;4. Beijing Engineering and Technology Research Center for Internet of Things in Agriculture, Beijing 100083, PR China;5. National Innovation Center for Digital Fishery, China Agricultural University, Beijing 100083, PR China |
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| Abstract: | A novel measurement scheme for a three-dimensional (3D) object's surface boundary perimeter is proposed. This scheme consists of three steps. First, a light-pen single-camera 3D coordinate vision measurement system is devised to obtain the 3D coordinates of a detected object's 3D surface boundary. Second, a novel 3D B-spline active contour is applied to converge to the object's 3D surface boundary accurately. Finally, for the convergent active contour, its true contour length is computed as the detected object's true perimeter. An experiment on a bent surface's perimeter measurement indicates that this scheme's measurement repetition error decreases to 0.6%. |
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