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  • Book Overview & Buying 3D Deep Learning with Python
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3D Deep Learning with Python

3D Deep Learning with Python

By : Xudong Ma, David Farrugia, Vishakh Hegde, Lilit Yolyan
4.4 (5)
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3D Deep Learning with Python

3D Deep Learning with Python

4.4 (5)
By: Xudong Ma, David Farrugia, Vishakh Hegde, Lilit Yolyan

Overview of this book

With this hands-on guide to 3D deep learning, developers working with 3D computer vision will be able to put their knowledge to work and get up and running in no time. Complete with step-by-step explanations of essential concepts and practical examples, this book lets you explore and gain a thorough understanding of state-of-the-art 3D deep learning. You’ll see how to use PyTorch3D for basic 3D mesh and point cloud data processing, including loading and saving ply and obj files, projecting 3D points into camera coordination using perspective camera models or orthographic camera models, rendering point clouds and meshes to images, and much more. As you implement some of the latest 3D deep learning algorithms, such as differential rendering, Nerf, synsin, and mesh RCNN, you’ll realize how coding for these deep learning models becomes easier using the PyTorch3D library. By the end of this deep learning book, you’ll be ready to implement your own 3D deep learning models confidently.
Table of Contents (16 chapters)
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1
PART 1: 3D Data Processing Basics
4
PART 2: 3D Deep Learning Using PyTorch3D
9
PART 3: State-of-the-art 3D Deep Learning Using PyTorch3D

Formulating a deformable mesh fitting problem into an optimization problem

In this section, we are going to talk about how to formulate the mesh fitting problem into an optimization problem. One key observation here is that object surfaces such as pedestrians can always be continuously deformed into a sphere. Thus, the approach we are going to take will start from the surface of a sphere and deform the surface to minimize a cost function.

The cost function should be chosen such that it is a good measurement of how similar the point cloud is to the mesh. Here, we choose the major cost function to be the Chamfer set distance. The Chamfer distance is defined between two sets of points as follows:

The Chamfer distance is symmetric and is a sum of two terms. In the first term, for each point x in the first point cloud, the closest point y in the other point cloud is found. For each such pair x and y, their distance is obtained and the distances for all the...

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3D Deep Learning with Python
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