Download e-book for iPad: 3D Surface Reconstruction: Multi-Scale Hierarchical by Francesco Bellocchio

By Francesco Bellocchio

ISBN-10: 1461456312

ISBN-13: 9781461456315

ISBN-10: 1461456320

ISBN-13: 9781461456322

3D floor Reconstruction: Multi-Scale Hierarchical methods presents the right way to version 3D items in an incremental manner with the intention to trap extra finer information at every one step. The configuration of the version parameters, the explanation and recommendations are defined and mentioned intimately so the reader has a powerful realizing of the technique. Modeling starts off from info captured by way of 3D digitizers and makes the method much more transparent and interesting.

Innovative techniques, in keeping with renowned computer studying paradigms, specifically Radial foundation capabilities and the help Vector Machines, also are brought. those paradigms are innovatively prolonged to a multi-scale incremental constitution, in keeping with a hierarchical scheme. The ensuing methods permit readers to accomplish excessive accuracy with constrained computational complexity, and makes the methods acceptable for on-line, real-time operation. purposes are available in any area within which regression is needed.

3D floor Reconstruction: Multi-Scale Hierarchical Approaches is designed as a secondary textual content e-book or reference for advanced-level scholars and researchers in laptop technological know-how. This e-book additionally goals practitioners operating in machine imaginative and prescient or desktop studying comparable fields.

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Extra resources for 3D Surface Reconstruction: Multi-Scale Hierarchical Approaches

Example text

In [19] the bounding box of the points is regularly partitioned into cubes (Fig. 1a–b). Only the cubes that have at least an internal data point are considered (Fig. 1b). A first surface approximation is composed of the exterior faces of the cubes that are not shared by any two cubes. These faces are then diagonally divided in order to obtain a triangular mesh (Fig. 1c). A smoother version of this surface is obtained moving each vertex of the mesh in the point resulting from a weighted average of its old position and the position of its neighbors (Fig.

From the 2D points their associated 3D point can be determined as the intersection of the retro-projected rays (Figs. 4). This reconstruction method is known as triangulation. It is worth noting that this method requires complete knowledge of the set-up parameters: the (relative) position and orientation of the cameras, as well as of the cameras internal parameters (focal length, optical center, pixel size and distortion parameters). These parameters are determined during a phase called calibration.

The work revealed that the problem requires the solution of a nonlinear first-order differential equation called the brightness equation. Today, the shape-from-shading problem is known to be an ill-posed problem, which does not have a single solution [50]. What makes difficult to find a solution for this problem is often illustrated by the concave/convex ambiguity, caused by the fact that the same shading can be obtained both for a surface and its inverted surface, for a different direction of the illuminant.

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3D Surface Reconstruction: Multi-Scale Hierarchical Approaches by Francesco Bellocchio

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