Processing and application of 3D data points by digital fringe projection method for the ribcage shape measurement

• Main Authors: Yi-Ta Chung, 鍾宜達
• Other Authors: Jih-Hua Chin
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/71885728466781652943

碩士 === 國立交通大學 === 機械工程系所 === 95 === This thesis studies the processing techniques and applications of 3D data points in the shape measurement of the ribcage for patients with funnel chest. The 3D data points are acquired by the digital fringe projection method from two different camera views. First, automatic registration and integration methods for combining two point sets of different views are developed. In registration of data points, points of the same feature in two different data sets are specified, and a robust algorithm is developed for finding the best coordinate translation and rotation matrices that combine two point sets. In integrating data points, average blending, linear blending, and quadratic blending methods are developed such that two data sets are integrated into one seamless and non-redundant smooth surface. Then, a software system is developed for data points display, registration, integration, and post processing for the two point sets. The software system is developed using Visual C++ language. Finally, the developed system is applied in the ribcage shape measurement for patients with funnel chest. The ribcage shapes of a patient before and after the surgery for placing a fixation bar inside the chest are measured. The effect of the surgery can be evaluated by comparing the ribcage shapes before and after the surgery.