Three-Dimensional Reconstruction for Medical-CAD Modeling

Abstract

Reverse engineering, the process of obtaining a geometric CAD model from measurements obtained by scanning an existing physical model, is widely used in numerous applications, such as manufacturing, industrial design and jewellery design and reproduction. For creating editable CAD models meant for manufacturing we identify that it is more appropriate to use feature-based constraint-based representations, since they capture plausible design intent. We propose this type of model representation for reverse engineering 3D point clouds of jewellery objects. In this paper we propose an approach for reverse engineering of jewellery combining skeleton construction, feature and constraint information exploitation to obtain a more robust and accurate CAD model. First we automatically construct the skeleton of the point cloud. Constraints are automatically detected based on the skeleton and then an iterative interactive process is carried out, during which features are fitted to the point cloud according to constraints. A voxel inspired technique is also employed to describe repeated patterns common to various types of traditional jewellery.

A comparative approach to computer aided design model of a dog femur

“…The result of the study made by Tolouei-Rad [13] was suggested that the software choice must be tailored to the needs individually. In the study of Starly et al [11] researchers were evaluated the assessments on the creation stages of a 3D model and they found that reverse engineering gave better results compared with other software.…”

Internal Scaffold Architecture Designs using Lindenmayer Systems

“…However, the design has always been limited to such regular primitive shapes in the form of patterned straight lines, square or circular holes. This is primarily due to shortcomings of current CAD technologies either in representation of such micro-structures or the inability to transfer detailed microstructure information to SFF machines [14][15][16]. There is a need to expand the pore architecture variety to provide for better functionality and adequate nutrient supply into the interior of the scaffold.…”

Development of a multi-component CAD model of human elbow structure

“…Biomechanics work of human knee structure is successfully carried out after segmenting 2D medical images to design 3D model of human knee for analysis purpose [6], [7]. Reconstruction of CAD models and image extraction from 2D data has received significant attention [8]. Biomedical imaging is now universally accepted clinical course of action, and has became a part of future trends [9].…”