Search Results for author: Zhongzheng Ren

Found 15 papers, 7 papers with code

UFO²: A Unified Framework towards Omni-supervised Object Detection

1 code implementation ECCV 2020 Zhongzheng Ren, Zhiding Yu, Xiaodong Yang, Ming-Yu Liu, Alexander G. Schwing, Jan Kautz

Existing work on object detection often relies on a single form of annotation: the model is trained using either accurate yet costly bounding boxes or cheaper but less expressive image-level tags.

Object object-detection +1

StableDreamer: Taming Noisy Score Distillation Sampling for Text-to-3D

no code implementations2 Dec 2023 Pengsheng Guo, Hans Hao, Adam Caccavale, Zhongzheng Ren, Edward Zhang, Qi Shan, Aditya Sankar, Alexander G. Schwing, Alex Colburn, Fangchang Ma

Our analysis identifies the core of these challenges as the interaction among noise levels in the 2D diffusion process, the architecture of the diffusion network, and the 3D model representation.

3D Generation Text to 3D +1

CASA: Category-agnostic Skeletal Animal Reconstruction

no code implementations4 Nov 2022 Yuefan Wu, Zeyuan Chen, Shaowei Liu, Zhongzheng Ren, Shenlong Wang

Recovering the skeletal shape of an animal from a monocular video is a longstanding challenge.

Retrieval

Occupancy Planes for Single-view RGB-D Human Reconstruction

1 code implementation4 Aug 2022 Xiaoming Zhao, Yuan-Ting Hu, Zhongzheng Ren, Alexander G. Schwing

Specifically, a set of 3D locations within the view-frustum of the camera are first projected independently onto the image and a corresponding feature is subsequently extracted for each 3D location.

3D Human Reconstruction

Neural Volumetric Object Selection

no code implementations CVPR 2022 Zhongzheng Ren, Aseem Agarwala, Bryan Russell, Alexander G. Schwing, Oliver Wang

We introduce an approach for selecting objects in neural volumetric 3D representations, such as multi-plane images (MPI) and neural radiance fields (NeRF).

Object Segmentation

Semantic Tracklets: An Object-Centric Representation for Visual Multi-Agent Reinforcement Learning

no code implementations6 Aug 2021 Iou-Jen Liu, Zhongzheng Ren, Raymond A. Yeh, Alexander G. Schwing

We evaluate `semantic tracklets' on the visual multi-agent particle environment (VMPE) and on the challenging visual multi-agent GFootball environment.

Multi-agent Reinforcement Learning reinforcement-learning +1

3D Spatial Recognition without Spatially Labeled 3D

1 code implementation CVPR 2021 Zhongzheng Ren, Ishan Misra, Alexander G. Schwing, Rohit Girdhar

We introduce WyPR, a Weakly-supervised framework for Point cloud Recognition, requiring only scene-level class tags as supervision.

3D Object Detection Multiple Instance Learning +5

UFO$^2$: A Unified Framework towards Omni-supervised Object Detection

no code implementations21 Oct 2020 Zhongzheng Ren, Zhiding Yu, Xiaodong Yang, Ming-Yu Liu, Alexander G. Schwing, Jan Kautz

Existing work on object detection often relies on a single form of annotation: the model is trained using either accurate yet costly bounding boxes or cheaper but less expressive image-level tags.

object-detection Object Detection

Not All Unlabeled Data are Equal: Learning to Weight Data in Semi-supervised Learning

no code implementations NeurIPS 2020 Zhongzheng Ren, Raymond A. Yeh, Alexander G. Schwing

Existing semi-supervised learning (SSL) algorithms use a single weight to balance the loss of labeled and unlabeled examples, i. e., all unlabeled examples are equally weighted.

Learning to Anonymize Faces for Privacy Preserving Action Detection

1 code implementation ECCV 2018 Zhongzheng Ren, Yong Jae Lee, Michael S. Ryoo

The end result is a video anonymizer that performs pixel-level modifications to anonymize each person's face, with minimal effect on action detection performance.

Action Detection Privacy Preserving

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