KEYWORDS: Engineering, Reconstruction algorithms, 3D modeling, Contour extraction, Solids, Visualization, Process engineering, Detection and tracking algorithms, Data analysis
To automatically reconstruct the engineering drawings of shaft parts, a complete 3D reconstruction algorithm is proposed using DXF files as input. The algorithm proposes the data analysis method based on the view centerline, which can effectively analyze the engineering drawings of shaft parts containing flat keyways and through-holes, including view separation, outer contour extraction, and keyway information extraction and classification. Experiments prove that based on this data analysis method, the 3D reconstruction algorithm can automatically reconstruct the engineering drawings of shaft parts containing flat keyways, grooves, or through-holes compared with the existing methods.
Registration local sets of points for obtaining one final data set is a vital technology in 3D measurement of large-scale objects. In this paper, a new optical 3D measurement system using finge projection is presented, which is divided into four parts, including moving device, linking camera, stereo cameras and projector. Controlled by a computer, a sequence of local sets of points can be obtained based on temporal phase unwrapping and stereo vision. Two basic principles of place dependance and phase dependance are used to register these local sets of points into one final data set, and bundle adjustment is used to eliminate registration errors.
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