Search Results for author: Anastasis Stathopoulos

Found 6 papers, 5 papers with code

Score-Guided Diffusion for 3D Human Recovery

1 code implementation14 Mar 2024 Anastasis Stathopoulos, Ligong Han, Dimitris Metaxas

We present Score-Guided Human Mesh Recovery (ScoreHMR), an approach for solving inverse problems for 3D human pose and shape reconstruction.

Denoising Human Mesh Recovery

Improving Tuning-Free Real Image Editing with Proximal Guidance

1 code implementation8 Jun 2023 Ligong Han, Song Wen, Qi Chen, Zhixing Zhang, Kunpeng Song, Mengwei Ren, Ruijiang Gao, Anastasis Stathopoulos, Xiaoxiao He, Yuxiao Chen, Di Liu, Qilong Zhangli, Jindong Jiang, Zhaoyang Xia, Akash Srivastava, Dimitris Metaxas

Null-text inversion (NTI) optimizes null embeddings to align the reconstruction and inversion trajectories with larger CFG scales, enabling real image editing with cross-attention control.

Learning Articulated Shape with Keypoint Pseudo-labels from Web Images

no code implementations CVPR 2023 Anastasis Stathopoulos, Georgios Pavlakos, Ligong Han, Dimitris Metaxas

It is based on two key insights: (1) 2D keypoint estimation networks trained on as few as 50-150 images of a given object category generalize well and generate reliable pseudo-labels; (2) a data selection mechanism can automatically create a "curated" subset of the unlabeled web images that can be used for training -- we evaluate four data selection methods.

3D Reconstruction Keypoint Estimation +1

Exploiting Unlabeled Data with Vision and Language Models for Object Detection

1 code implementation18 Jul 2022 Shiyu Zhao, Zhixing Zhang, Samuel Schulter, Long Zhao, Vijay Kumar B. G, Anastasis Stathopoulos, Manmohan Chandraker, Dimitris Metaxas

We propose a novel method that leverages the rich semantics available in recent vision and language models to localize and classify objects in unlabeled images, effectively generating pseudo labels for object detection.

Ranked #15 on Open Vocabulary Object Detection on MSCOCO (using extra training data)

Object object-detection +3

Dual Projection Generative Adversarial Networks for Conditional Image Generation

1 code implementation ICCV 2021 Ligong Han, Martin Renqiang Min, Anastasis Stathopoulos, Yu Tian, Ruijiang Gao, Asim Kadav, Dimitris Metaxas

We then propose an improved cGAN model with Auxiliary Classification that directly aligns the fake and real conditionals $P(\text{class}|\text{image})$ by minimizing their $f$-divergence.

Conditional Image Generation

Unbiased Auxiliary Classifier GANs with MINE

1 code implementation13 Jun 2020 Ligong Han, Anastasis Stathopoulos, Tao Xue, Dimitris Metaxas

To remedy this, Twin Auxiliary Classifier GAN (TAC-GAN) introduces a twin classifier to the min-max game.

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