Development of the 3D engraving system from 2D images

Abstract

Design is important in the IT, digital appliance, and auto industries. Aesthetic images are being applied for making better design. Various images are used to improve design quality. However, it takes much lead-time and effort to implement them for 3D engraving processes. In this paper, a hybrid reverse engineering method generating accurate 3D CAD models from 2D art images is proposed through the image processing, 3D reconstruction, B-spline surface interpolation and fairing methods. Cloud points with z-depth are extracted according to intensity values of the image. Adaptive median and harmonic filters are used to obtain accurate intensity values. B-spline surfaces are generated through the interpolation of cloud points and the optimization of the fairness. Performance of the developed turnaround system is verified through construction of 3D CAD models, generation of tool-paths and high-speed machining of molds.