Search Results for author: Xi Jia

Found 16 papers, 9 papers with code

Rediscovering BCE Loss for Uniform Classification

no code implementations12 Mar 2024 Qiufu Li, Xi Jia, Jiancan Zhou, Linlin Shen, Jinming Duan

We also propose the uniform classification accuracy as a metric to measure the model's performance in uniform classification.

Classification Face Recognition

Decoder-Only Image Registration

1 code implementation5 Feb 2024 Xi Jia, Wenqi Lu, Xinxing Cheng, Jinming Duan

For this, we propose a novel network architecture, termed LessNet in this paper, which contains only a learnable decoder, while entirely omitting the utilization of a learnable encoder.

Image Registration Medical Image Registration

Fourier-Net+: Leveraging Band-Limited Representation for Efficient 3D Medical Image Registration

1 code implementation6 Jul 2023 Xi Jia, Alexander Thorley, Alberto Gomez, Wenqi Lu, Dipak Kotecha, Jinming Duan

Instead of directly predicting a full-resolution displacement field, our Fourier-Net learns a low-dimensional representation of the displacement field in the band-limited Fourier domain which our model-driven decoder converts to a full-resolution displacement field in the spatial domain.

Medical Image Registration Unsupervised Image Registration

UniFace: Unified Cross-Entropy Loss for Deep Face Recognition

1 code implementation ICCV 2023 Jiancan Zhou, Xi Jia, Qiufu Li, Linlin Shen, Jinming Duan

To bridge this gap, we design a UCE (Unified Cross-Entropy) loss for face recognition model training, which is built on the vital constraint that all the positive sample-to-class similarities shall be larger than the negative ones.

Face Recognition TAR

Category-Level 6D Object Pose Estimation with Flexible Vector-Based Rotation Representation

no code implementations9 Dec 2022 Wei Chen, Xi Jia, Zhongqun Zhang, Hyung Jin Chang, Linlin Shen, Jinming Duan, Ales Leonardis

The proposed rotation representation has two major advantages: 1) decoupled characteristic that makes the rotation estimation easier; 2) flexible length and rotated angle of the vectors allow us to find a more suitable vector representation for specific pose estimation task.

6D Pose Estimation using RGB Data Augmentation

Fourier-Net: Fast Image Registration with Band-limited Deformation

1 code implementation29 Nov 2022 Xi Jia, Joseph Bartlett, Wei Chen, Siyang Song, Tianyang Zhang, Xinxing Cheng, Wenqi Lu, Zhaowen Qiu, Jinming Duan

Specifically, instead of our Fourier-Net learning to output a full-resolution displacement field in the spatial domain, we learn its low-dimensional representation in a band-limited Fourier domain.

Ranked #3 on Medical Image Registration on OASIS (val dsc metric)

Medical Image Registration Unsupervised Image Registration

GRATIS: Deep Learning Graph Representation with Task-specific Topology and Multi-dimensional Edge Features

1 code implementation19 Nov 2022 Siyang Song, Yuxin Song, Cheng Luo, Zhiyuan Song, Selim Kuzucu, Xi Jia, Zhijiang Guo, Weicheng Xie, Linlin Shen, Hatice Gunes

Our framework is effective, robust and flexible, and is a plug-and-play module that can be combined with different backbones and Graph Neural Networks (GNNs) to generate a task-specific graph representation from various graph and non-graph data.

Graph Representation Learning

U-Net vs Transformer: Is U-Net Outdated in Medical Image Registration?

1 code implementation7 Aug 2022 Xi Jia, Joseph Bartlett, Tianyang Zhang, Wenqi Lu, Zhaowen Qiu, Jinming Duan

On the public 3D IXI brain dataset for atlas-based registration, we show that the performance of the vanilla U-Net is already comparable with that of state-of-the-art transformer-based networks (such as TransMorph), and that the proposed LKU-Net outperforms TransMorph by using only 1. 12% of its parameters and 10. 8% of its mult-adds operations.

Image Registration Long-range modeling +1

Nesterov Accelerated ADMM for Fast Diffeomorphic Image Registration

no code implementations26 Sep 2021 Alexander Thorley, Xi Jia, Hyung Jin Chang, Boyang Liu, Karina Bunting, Victoria Stoll, Antonio de Marvao, Declan P. O'Regan, Georgios Gkoutos, Dipak Kotecha, Jinming Duan

Recent developments in stochastic approaches based on deep learning have achieved sub-second runtimes for DiffIR with competitive registration accuracy, offering a fast alternative to conventional iterative methods.

Image Registration

Learning a Model-Driven Variational Network for Deformable Image Registration

no code implementations25 May 2021 Xi Jia, Alexander Thorley, Wei Chen, Huaqi Qiu, Linlin Shen, Iain B Styles, Hyung Jin Chang, Ales Leonardis, Antonio de Marvao, Declan P. O'Regan, Daniel Rueckert, Jinming Duan

We then propose two neural layers (i. e. warping layer and intensity consistency layer) to model the analytical solution and a residual U-Net to formulate the denoising problem (i. e. generalized denoising layer).

Denoising Image Registration

Geometry Constrained Weakly Supervised Object Localization

1 code implementation ECCV 2020 Weizeng Lu, Xi Jia, Weicheng Xie, Linlin Shen, Yicong Zhou, Jinming Duan

The detector predicts the object location defined by a set of coefficients describing a geometric shape (i. e. ellipse or rectangle), which is geometrically constrained by the mask produced by the generator.

Object Weakly-Supervised Object Localization

G2L-Net: Global to Local Network for Real-time 6D Pose Estimation with Embedding Vector Features

1 code implementation CVPR 2020 Wei Chen, Xi Jia, Hyung Jin Chang, Jinming Duan, Ales Leonardis

Third, via the predicted segmentation and translation, we transfer the fine object point cloud into a local canonical coordinate, in which we train a rotation localization network to estimate initial object rotation.

6D Pose Estimation 6D Pose Estimation using RGB +2

Texture Deformation Based Generative Adversarial Networks for Face Editing

no code implementations24 Dec 2018 WenTing Chen, Xinpeng Xie, Xi Jia, Linlin Shen

We also evaluate our approach qualitatively and quantitatively on facial attribute and facial expression synthesis.

Attribute Image-to-Image Translation +1

Skin Lesion Classification using Class Activation Map

no code implementations3 Mar 2017 Xi Jia, Linlin Shen

We proposed a two stage framework with only one network to analyze skin lesion images, we firstly trained a convolutional network to classify these images, and cropped the import regions which the network has the maximum activation value.

Classification General Classification +2

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