Abstract
Acquiring profile data and producing CAD models are indispensable to style designing based on a master model. Therefore the present studies aim to generate high-quality CAD models from measured point data on a master model which has free-form surfaces. In the former report, a method to measure a master model, that is, boundary high-density measuring, and a method of character-area extracting were proposed. This paper describes a strategy of remeasurement in extracted character-areas and one technique to generate free-form surfaces from the measured point data acquired by the remeasurement. The master model is measured with a non-contact 3-D digitizing system developed by the authors. In the remeasurement, a patch on each hierarchical structure is divided into four parts in a quadtree method, and a uniform cubic B-spline curve fits onto the measured point data. The fitted patches are connected to subdivided ones and they together can form the free-form surface of the master model with their adjacent patches conforming to the C2 continuity. New techniques are also proposed for connecting B-spline curves with surfaces by use of pseudo vertices. The results of inspection experiments with the measured point data confirm the availability of those methods.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Japan Society for Precision Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
