Deep 3D Machine Learning for Reconstruction and Repair of 3D Surfaces
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1 Deep 3D Machine Learning for Reconstruction and Repair of 3D Surfaces TalkID This session will give the audience a quick overview of recent developments in the field of 3D surface analysis with deep learning techniques and an insight into our approach for 3D surface repair.
2 Pascal Laube PhD Student at the Institute for Optical Systems at the HTWG Konstanz government-funded by Main focus: Machine Learning for Surface Reconstruction Defect Detection and Repair (Inpainting) Medical Imaging
3 Representation: The 2D case Output Grid in euclidean space Neural Network (in this case CNN)
4 Representation: In 3D? Point Cloud? Mesh?? Neural Network Any manifold (NURBS, impl. surf., )
5 Representations: Voxels [Vishakh Hegde et al., NIPS (2016)]
6 Representations: Voxels [Zhirong Wu et al., CVPR (2015)]
7 Representations: Multi-View [Hang Su et al., ICCV (2015)]
8 Representations: Multi-View [Liuhao Ge et al., CVPR (2016)]
9 Representations: Graph Signal Processing Graph Laplacian or Laplace Beltrami Operator as f = div( f) Laplacian Eigenfunctions generalize to Fourier bases. [M. Bronstein et al., Sig. Proc. Mag (2017)] Convolution in the spectral domain is defined but filters are base dependent.
10 Representations: Graph Signal Processing Train filters in geodesic polar coordinates. Pool rotation angles [J. Masci et al., ICCV (2015)] Many other methods using different kernels (heat diffusion, gauss )
11 Data Sets 127,915 CAD Models 662 Object Categories Different Subsets 51,300 Models 270 Object Categories in Model Subsets Many smaller specialized Data Sets
12 Problem: Defect on Surface with Detail- and Base-Geometry Fraunhofer IPT
13 Problem: Defect on Surface with Detail- and Base-Geometry Werkzeugbau Siegfried Hofmann GmbH
14 Problem: Defect on Surface with Detail- and Base-Geometry (3) High resolution meshes with > 1m vertices Base Geometry and Relief
15 Our Approach B-Spline Approx. or Base Geometry Approx. by Geometric Primitive or Multiresolut. Surfaces Detail Geometry Heightmap Surface with Defect Seperation Novelty Detection using 1 Base Geo. Detail Geo. 2 3 Autoencoders Multiresolution Neural Nets for Inpainting
16 2 Novelty Detection using Autoencoders Defect unknown Healthy state unknown What do we know? Textures have to be ergodic: Statistical properties are constant for single sample and whole collection
17 2 Novelty Detection using Autoencoders Autoencoder should be unable to sufficiently reconstruct Defects Train Autoencoder on Ergodic Set of Textures
18 Loss government-funded by 2 Novelty Detection using Autoencoders Parallelizable to multiple GPUs Samples
19 3 Multiresolution Neural Nets for Inpainting: Texture Synthesis Activation Network Synth. Network [L. Gatys et al., NIPS (2015)]
20 3 Multiresolution Neural Nets for Inpainting: Style Transfer [L. Gatys et al., arxiv.org (2015)]
21 3 Multiresolution Neural Nets for Inpainting: Example Defect Closeup 2048x2048
22 3 Multiresolution Neural Nets for Inpainting: Patches Inpainting a Region with arbitrary size? Inpaint Patch by Patch Local Style Global Style 2048x2048
23 3 Multiresolution Neural Nets for Inpainting: Results 1. Start 2. Inpaint Patches: Large Parent Weight 3. Inpaint Patches: Apply Detail Large Child Weight Small Parent Weight
24 3 Multiresolution Neural Nets for Inpainting: Results Result Result Closeup
25 3 Multiresolution Neural Nets for Inpainting: Results Heightmap Parallelizable to multiple GPUs
26 3 Multiresolution Neural Nets for Inpainting: Results Surface
27 Outlook Neural Nets in high dimensional irregular domains Michael M. Bronstein et al., Geometric deep learning: going beyond Euclidean data (2017) [M. Bronstein et al., Sig. Proc. Mag (2017)] Michaël Defferrard, Convolutional Neural Networks on Graphs with Fast Localized Spectral Filtering (2016) [J. Masci et al., ICCV (2015)]
28 Thank You
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