High accuracy three-dimensional shape measurements for supporting manufacturing industries

Accuracy of three-dimensional printing for manufacturing replica teeth

OBJECTIVE Three-dimensional (3D) printing is a recent technological development that may play a significant role in orthodontic diagnosis and treatment. It can be used to fabricate skull models or study models, as well as to make replica teeth in autotransplantation or tooth impaction cases. The aim of this study was to evaluate the accuracy of fabrication of replica teeth made by two types of ...

High-speed high-accuracy three- dimensional shape measurement using digital binary defocusing method versus sinusoidal method

This paper presents our research findings on high-speed high-accuracy three-dimensional shape measurement using digital light processing (DLP) technologies. In particular, we compare two different sinusoidal fringe generation techniques using the DLP projection devices: direct projection of computer-generated 8-bit sinusoidal patterns (a.k.a., the sinusoidal method), and the creation of sinusoi...

Supporting Effective and Efficient Three-dimensional Shape Retrival

In this paper, we discuss the search effectiveness and efficiency of content-based 3D shape search. The search effectiveness is characterized by the precision and recall of results; and the search efficiency is evaluated by the ratio of the number of the visited nodes in a search operation to the number of the nodes of an index. A real database of 113 3D shapes and synthetic databases created b...

Supporting Effective and Efficient Three-dimensional Shape Retrieval

In this paper, we discuss the search effectiveness and efficiency of content-based 3D shape search. The search effectiveness is characterized by the precision and recall of results; and the search efficiency is evaluated by the ratio of the number of the visited nodes in a search operation to the number of the nodes of an index. A real database of 113 3D shapes and synthetic databases created b...

High-accuracy global localization filter for three-dimensional environments