Search Results for author: Gopal Sharma

Found 15 papers, 7 papers with code

CSGNet: Neural Shape Parser for Constructive Solid Geometry

1 code implementation CVPR 2018 Gopal Sharma, Rishabh Goyal, Difan Liu, Evangelos Kalogerakis, Subhransu Maji

In contrast, our model uses a recurrent neural network that parses the input shape in a top-down manner, which is significantly faster and yields a compact and easy-to-interpret sequence of modeling instructions.

Search-Guided, Lightly-supervised Training of Structured Prediction Energy Networks

no code implementations22 Dec 2018 Amirmohammad Rooshenas, Dongxu Zhang, Gopal Sharma, Andrew McCallum

In this paper, we instead use efficient truncated randomized search in this reward function to train structured prediction energy networks (SPENs), which provide efficient test-time inference using gradient-based search on a smooth, learned representation of the score landscape, and have previously yielded state-of-the-art results in structured prediction.

Structured Prediction

Learning Point Embeddings from Shape Repositories for Few-Shot Segmentation

no code implementations3 Oct 2019 Gopal Sharma, Evangelos Kalogerakis, Subhransu Maji

We present a framework for learning representations of 3D shapes that reflect the information present in this meta data and show that it leads to improved generalization for semantic segmentation tasks.

Metric Learning Segmentation +2

Neural Shape Parsers for Constructive Solid Geometry

no code implementations22 Dec 2019 Gopal Sharma, Rishabh Goyal, Difan Liu, Evangelos Kalogerakis, Subhransu Maji

We investigate two architectures for this task --- a vanilla encoder (CNN) - decoder (RNN) and another architecture that augments the encoder with an explicit memory module based on the program execution stack.

ParSeNet: A Parametric Surface Fitting Network for 3D Point Clouds

2 code implementations ECCV 2020 Gopal Sharma, Difan Liu, Subhransu Maji, Evangelos Kalogerakis, Siddhartha Chaudhuri, Radomír Měch

We propose a novel, end-to-end trainable, deep network called ParSeNet that decomposes a 3D point cloud into parametric surface patches, including B-spline patches as well as basic geometric primitives.

MvDeCor: Multi-view Dense Correspondence Learning for Fine-grained 3D Segmentation

2 code implementations18 Aug 2022 Gopal Sharma, Kangxue Yin, Subhransu Maji, Evangelos Kalogerakis, Or Litany, Sanja Fidler

As a result, the learned 2D representations are view-invariant and geometrically consistent, leading to better generalization when trained on a limited number of labeled shapes compared to alternatives that utilize self-supervision in 2D or 3D alone.

Contrastive Learning Segmentation

Accelerating Neural Field Training via Soft Mining

no code implementations29 Nov 2023 Shakiba Kheradmand, Daniel Rebain, Gopal Sharma, Hossam Isack, Abhishek Kar, Andrea Tagliasacchi, Kwang Moo Yi

We present an approach to accelerate Neural Field training by efficiently selecting sampling locations.

Unsupervised Keypoints from Pretrained Diffusion Models

1 code implementation29 Nov 2023 Eric Hedlin, Gopal Sharma, Shweta Mahajan, Xingzhe He, Hossam Isack, Abhishek Kar Helge Rhodin, Andrea Tagliasacchi, Kwang Moo Yi

Unsupervised learning of keypoints and landmarks has seen significant progress with the help of modern neural network architectures, but performance is yet to match the supervised counterpart, making their practicability questionable.

Denoising Unsupervised Human Pose Estimation +1

Volumetric Rendering with Baked Quadrature Fields

no code implementations2 Dec 2023 Gopal Sharma, Daniel Rebain, Kwang Moo Yi, Andrea Tagliasacchi

We propose a novel Neural Radiance Field (NeRF) representation for non-opaque scenes that allows fast inference by utilizing textured polygons.

PointNeRF++: A multi-scale, point-based Neural Radiance Field

no code implementations4 Dec 2023 Weiwei Sun, Eduard Trulls, Yang-Che Tseng, Sneha Sambandam, Gopal Sharma, Andrea Tagliasacchi, Kwang Moo Yi

We overcome these problems with a simple representation that aggregates point clouds at multiple scale levels with sparse voxel grids at different resolutions.

Neural Rendering valid

3D Gaussian Splatting as Markov Chain Monte Carlo

no code implementations15 Apr 2024 Shakiba Kheradmand, Daniel Rebain, Gopal Sharma, Weiwei Sun, Jeff Tseng, Hossam Isack, Abhishek Kar, Andrea Tagliasacchi, Kwang Moo Yi

While 3D Gaussian Splatting has recently become popular for neural rendering, current methods rely on carefully engineered cloning and splitting strategies for placing Gaussians, which does not always generalize and may lead to poor-quality renderings.

Neural Rendering

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