Search Results for author: Changxi Zheng

Found 16 papers, 7 papers with code

Neural Impostor: Editing Neural Radiance Fields with Explicit Shape Manipulation

no code implementations9 Oct 2023 Ruiyang Liu, Jinxu Xiang, Bowen Zhao, Ran Zhang, Jingyi Yu, Changxi Zheng

To tackle the problem of efficiently editing neural implicit fields, we introduce Neural Impostor, a hybrid representation incorporating an explicit tetrahedral mesh alongside a multigrid implicit field designated for each tetrahedron within the explicit mesh.

Textureless Deformable Surface Reconstruction with Invisible Markers

no code implementations25 Aug 2023 Xinyuan Li, Yu Ji, Yanchen Liu, Xiaochen Hu, Jinwei Ye, Changxi Zheng

Leveraging the markers, we design a multi-camera system that captures surface deformation under the UV light and the visible light in a time multiplexing fashion.

3D Reconstruction 3D Shape Reconstruction +1

Sin3DM: Learning a Diffusion Model from a Single 3D Textured Shape

1 code implementation24 May 2023 Rundi Wu, Ruoshi Liu, Carl Vondrick, Changxi Zheng

Specifically, we encode the input 3D textured shape into triplane feature maps that represent the signed distance and texture fields of the input.


Implicit Neural Spatial Representations for Time-dependent PDEs

no code implementations30 Sep 2022 Honglin Chen, Rundi Wu, Eitan Grinspun, Changxi Zheng, Peter Yichen Chen

Whereas classical solvers can dynamically adapt their spatial representation only by resorting to complex remeshing algorithms, our INSR approach is intrinsically adaptive.

Contact mechanics

Learning to Generate 3D Shapes from a Single Example

no code implementations5 Aug 2022 Rundi Wu, Changxi Zheng

Existing generative models for 3D shapes are typically trained on a large 3D dataset, often of a specific object category.

Can one hear the shape of a neural network?: Snooping the GPU via Magnetic Side Channel

no code implementations15 Sep 2021 Henrique Teles Maia, Chang Xiao, DIngzeyu Li, Eitan Grinspun, Changxi Zheng

We find that each layer component's evaluation produces an identifiable magnetic signal signature, from which layer topology, width, function type, and sequence order can be inferred using a suitably trained classifier and a joint consistency optimization based on integer programming.

DeepCAD: A Deep Generative Network for Computer-Aided Design Models

1 code implementation ICCV 2021 Rundi Wu, Chang Xiao, Changxi Zheng

We present the first 3D generative model for a drastically different shape representation --- describing a shape as a sequence of computer-aided design (CAD) operations.

Linear Semantics in Generative Adversarial Networks

1 code implementation CVPR 2021 Jianjin Xu, Changxi Zheng

Given a trained GAN and as few as eight semantic annotations, the user is able to generate diverse images subject to a user-provided semantic layout, and control the synthesized image semantics.

Semantic Segmentation

Listening to Sounds of Silence for Speech Denoising

1 code implementation NeurIPS 2020 Ruilin Xu, Rundi Wu, Yuko Ishiwaka, Carl Vondrick, Changxi Zheng

We introduce a deep learning model for speech denoising, a long-standing challenge in audio analysis arising in numerous applications.

Denoising Speech Denoising

Enhancing Adversarial Defense by k-Winners-Take-All

1 code implementation ICLR 2020 Chang Xiao, Peilin Zhong, Changxi Zheng

In all cases, the robustness of k-WTA networks outperforms that of traditional networks under white-box attacks.

Adversarial Defense Test

Rethinking Generative Mode Coverage: A Pointwise Guaranteed Approach

no code implementations NeurIPS 2019 Peilin Zhong, Yuchen Mo, Chang Xiao, Peng-Yu Chen, Changxi Zheng

The conventional wisdom to this end is by reducing through training a statistical distance (such as $f$-divergence) between the generated distribution and provided data distribution.

BourGAN: Generative Networks with Metric Embeddings

1 code implementation NeurIPS 2018 Chang Xiao, Peilin Zhong, Changxi Zheng

This paper addresses the mode collapse for generative adversarial networks (GANs).

Scene-Aware Audio for 360\textdegree{} Videos

no code implementations12 May 2018 Dingzeyu Li, Timothy R. Langlois, Changxi Zheng

In our validations, we show that our synthesized spatial audio matches closely with recordings using ambisonic microphones.

FontCode: Embedding Information in Text Documents using Glyph Perturbation

no code implementations28 Jul 2017 Chang Xiao, Cheng Zhang, Changxi Zheng

We then introduce an algorithm that embeds a user-provided message in the text document and produces an encoded document whose appearance is minimally perturbed from the original document.

AirCode: Unobtrusive Physical Tags for Digital Fabrication

no code implementations18 Jul 2017 Dingzeyu Li, Avinash S. Nair, Shree K. Nayar, Changxi Zheng

We present AirCode, a technique that allows the user to tag physically fabricated objects with given information.

Robotic Grasping TAG

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