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Posts

An Attempt to Reduce the Number of Training Samples for Convolutional Neural Networks

Training deep neural networks can be resources-consuming. The budget required is in- creasing with the size of the dataset. During the past ten years, many achievements are dedicated to accelerating the convergence speed with heuristic or theoretical training procedures. However, we still need the whole dataset to train the network and paying for a large dataset may not pay back well if we can use a smaller subset to achieve an acceptable performance. In order to reduce the number of training samples needed, we first adapted and evaluated three methods, Patterns by Ordered Projections (POP), En- hanced Global Density-based Instance Selection (EGDIS), and Curriculum Learning (CL), to reduce the size of two image datasets, CIFAR10 and CIFAR100, for the clas- sification task. Based on the analysis, we present our main contributions: improved CL and evaluated its two variations, the Weighted Curriculum Learning (WCL) and the Boundary based Weighted Curriculum Learning (BWCL). The WCL outperforms POP and EGDIS in terms of both classification accuracy and time complexity. Also, WCL and BWCL achieve comparable performance compared with CL while keeping a portion of hard examples. Besides, we proposed a trade-off framework for WCL to select a subset of samples according to the acceptable relative accuracy and the original datasets.

portfolio

publications

Depth Estimation from a Single Omnidirectional Image Using Domain Adaptation

Yihong Wu, Yuwen Heng, Mahesan Niranjan, and Hansung Kim. Depth estimation from a single omnidirectional image using domain adaptation. In European Conference on Visual Media Production (CVMP), pages 1–9, 2021

CAM-SegNet: A Context-Aware Dense Material Segmentation Network for Sparsely Labelled Datasets

Yuwen Heng, Yihong Wu, Srinandan Dasmahapatra, and Hansung Kim. CAM-SegNet: A Context-Aware Dense Material Segmentation Network for Sparsely Labelled Datasets. In 17th International Conference on Computer Vision Theory and Applications (VISAPP), volume 5, pages 190–201, 2022b

Room Acoustic Properties Estimation from a Single 360° Photo

Mona Alawadh, Yihong Wu, Yuwen Heng, Luca Remaggi, Mahesan Niranjan, and Hansung Kim. Room acoustic properties estimation from a single 360° photo. In 2022 30th European Signal Processing Conference (EUSIPCO). IEEE, 2022

Enhancing Material Features Using Dynamic Backward Attention on Cross-Resolution Patches

Yuwen Heng, Yihong Wu, Srinandan Dasmahapatra, and Hansung Kim. Enhancing material features using dynamic backward attention on cross-resolution patches. In 33rd British Machine Vision Conference 2022, BMVC 2022, London, UK, November 21-24, 2022. BMVA Press, 2022a

Material Recognition for Immersive Interactions in Virtual/Augmented Reality

Yuwen Heng, Srinandan Dasmahapatra, and Hansung Kim. Material recognition for immersive interactions in virtual/augmented reality. In 2023 IEEE conference on virtual reality and 3D user interfaces abstracts and workshops (VRW), pages 577–578. IEEE, 2023

Depth Estimation for a Single Omnidirectional Image with Reversed-gradient Warming-up Thresholds Discriminator

Yihong Wu, Yuwen Heng, Mahesan Niranjan, and Hansung Kim. Depth estimation for a single omnidirectional image with reversed-gradient warming-up thresholds discriminator. In 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2023

An investigation into dense material segmentation

Yuwen Heng. An investigation into dense material segmentation. PhD thesis, University of Southampton, United Kingdom, 2023

Enhancing Material Features Using Dynamic Backward Attention on Cross-Resolution Patches

Yuwen Heng, Yihong Wu, Srinandan Dasmahapatra, and Hansung Kim. Dense material segmentation with context-aware network. In A. Augusto de Sousa, Kurt Debattista, Alexis Paljic, Mounia Ziat, Christophe Hurter, Helen Purchase, Giovanni Maria Farinella, Petia Radeva, and Kadi Bouatouch, editors, Computer Vision, Imaging and Computer Graphics Theory and Applications, pages 66–88, Cham, 2023b. Springer Nature Switzerland. ISBN 978-3-031-45725-8

SliceFormer: Deep Dense Depth Estimation from a Single Indoor Omnidirectional Image using a Slice-based Transformer

Yihong Wu, Yuwen Heng, Mahesan Niranjan, and Hansung Kim. Sliceformer: Deep dense depth estimation from a single indoor omnidirectional image using a slice-based transformer. In 2024 International Conference on Electronics, Information, and Communication (ICEIC). IEEE, 2024

Advancements in 3D Lane Detection Using LiDAR Point Clouds: From Data Collection to Model Development

Runkai Zhao, Yuwen Heng, Yuanda Gao, Shilei Liu, Heng Wang, Changhao Yao, Jiawen Chen, and Weidong Cai. Advancements in 3d lane detection using lidar point clouds: From data collection to model development. In 2024 IEEE International Conference on Robotics and Automation (ICRA 2024), 2024

talks

teaching

Teaching experience 1

Undergraduate course, University 1, Department, 2014

This is a description of a teaching experience. You can use markdown like any other post.

Teaching experience 2

Workshop, University 1, Department, 2015

This is a description of a teaching experience. You can use markdown like any other post.