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In point cloud compression, the quality of a reconstructed point cloud relies on both the global structure and the local context, with existing methods usually processing global and local information sequentially and lacking communication…

Computer Vision and Pattern Recognition · Computer Science 2025-09-03 Xuan Deng , Xingtao Wang , Xiandong Meng , Xiaopeng Fan , Debin Zhao

We propose a novel framework for image clustering that incorporates joint representation learning and clustering. Our method consists of two heads that share the same backbone network - a "representation learning" head and a "clustering"…

Computer Vision and Pattern Recognition · Computer Science 2021-07-27 Kien Do , Truyen Tran , Svetha Venkatesh

While self-supervised learning techniques are often used to mining implicit knowledge from unlabeled data via modeling multiple views, it is unclear how to perform effective representation learning in a complex and inconsistent context. To…

Computer Vision and Pattern Recognition · Computer Science 2023-08-10 Jiangmeng Li , Wenwen Qiang , Changwen Zheng , Bing Su , Farid Razzak , Ji-Rong Wen , Hui Xiong

Model compression and acceleration are attracting increasing attentions due to the demand for embedded devices and mobile applications. Research on efficient convolutional neural networks (CNNs) aims at removing feature redundancy by…

Machine Learning · Computer Science 2020-08-21 Jinhua Liang , Tao Zhang , Guoqing Feng

Point clouds are often the default choice for many applications as they exhibit more flexibility and efficiency than volumetric data. Nevertheless, their unorganized nature -- points are stored in an unordered way -- makes them less suited…

Computer Vision and Pattern Recognition · Computer Science 2020-08-18 Yida Wang , David Joseph Tan , Nassir Navab , Federico Tombari

We study the problem of approximating compactly-supported integrable functions while implementing their support set using feedforward neural networks. Our first main result transcribes this "structured" approximation problem into a…

Machine Learning · Computer Science 2022-08-02 Anastasis Kratsios , Behnoosh Zamanlooy

One of the most promising approaches for unsupervised learning is combining deep representation learning and deep clustering. Some recent works propose to simultaneously learn representation using deep neural networks and perform clustering…

Computer Vision and Pattern Recognition · Computer Science 2022-09-07 Mina Rezaei , Emilio Dorigatti , David Ruegamer , Bernd Bischl

Semantic segmentation of large-scale outdoor point clouds is of significant importance in environment perception and scene understanding. However, this task continues to present a significant research challenge, due to the inherent…

Computer Vision and Pattern Recognition · Computer Science 2024-12-17 Haoran Gong , Haodong Wang , Di Wang

This paper presents DDF2Pol, a lightweight dual-domain convolutional neural network for PolSAR image classification. The proposed architecture integrates two parallel feature extraction streams, one real-valued and one complex-valued,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-22 Mohammed Q. Alkhatib

Transformer-based models have achieved great success in various NLP, vision, and speech tasks. However, the core of Transformer, the self-attention mechanism, has a quadratic time and memory complexity with respect to the sequence length,…

Computation and Language · Computer Science 2023-05-23 Chao-Hong Tan , Qian Chen , Wen Wang , Qinglin Zhang , Siqi Zheng , Zhen-Hua Ling

The low-level details and high-level semantics are both essential to the semantic segmentation task. However, to speed up the model inference, current approaches almost always sacrifice the low-level details, which leads to a considerable…

Computer Vision and Pattern Recognition · Computer Science 2020-04-07 Changqian Yu , Changxin Gao , Jingbo Wang , Gang Yu , Chunhua Shen , Nong Sang

Quantization neural networks (QNNs) are very attractive to the industry because their extremely cheap calculation and storage overhead, but their performance is still worse than that of networks with full-precision parameters. Most of…

Computer Vision and Pattern Recognition · Computer Science 2020-02-13 Chuanjian Liu , Kai Han , Yunhe Wang , Hanting Chen , Qi Tian , Chunjing Xu

We show that existing upsampling operators can be unified with the notion of the index function. This notion is inspired by an observation in the decoding process of deep image matting where indices-guided unpooling can recover boundary…

Computer Vision and Pattern Recognition · Computer Science 2019-08-05 Hao Lu , Yutong Dai , Chunhua Shen , Songcen Xu

Multi-modal approaches employ data from multiple input streams such as textual and visual domains. Deep neural networks have been successfully employed for these approaches. In this paper, we present a novel multi-modal approach that fuses…

Computer Vision and Pattern Recognition · Computer Science 2018-10-05 Ignazio Gallo , Alessandro Calefati , Shah Nawaz , Muhammad Kamran Janjua

In this paper, we present Shift Convolution Network (ShiftConvNet) to provide matching capability between two feature maps for stereo estimation. The proposed method can speedily produce a highly accurate disparity map from stereo images. A…

Computer Vision and Pattern Recognition · Computer Science 2019-11-21 Jian Xie

Accurately describing and detecting 2D and 3D keypoints is crucial to establishing correspondences across images and point clouds. Despite a plethora of learning-based 2D or 3D local feature descriptors and detectors having been proposed,…

Computer Vision and Pattern Recognition · Computer Science 2021-07-30 Bing Wang , Changhao Chen , Zhaopeng Cui , Jie Qin , Chris Xiaoxuan Lu , Zhengdi Yu , Peijun Zhao , Zhen Dong , Fan Zhu , Niki Trigoni , Andrew Markham

Recently, transformer and multi-layer perceptron (MLP) architectures have achieved impressive results on various vision tasks. A few works investigated manually combining those operators to design visual network architectures, and can…

Computer Vision and Pattern Recognition · Computer Science 2021-10-11 Jihao Liu , Hongsheng Li , Guanglu Song , Xin Huang , Yu Liu

We study the problem of localizing audio-visual events that are both audible and visible in a video. Existing works focus on encoding and aligning audio and visual features at the segment level while neglecting informative correlation…

Computer Vision and Pattern Recognition · Computer Science 2021-08-31 Hao Wang , Zheng-Jun Zha , Liang Li , Xuejin Chen , Jiebo Luo

Global pooling layers are an essential part of Convolutional Neural Networks (CNN). They are used to aggregate activations of spatial locations to produce a fixed-size vector in several state-of-the-art CNNs. Global average pooling or…

Computer Vision and Pattern Recognition · Computer Science 2024-02-28 Vincent Christlein , Lukas Spranger , Mathias Seuret , Anguelos Nicolaou , Pavel Král , Andreas Maier

Images captured nowadays are of varying dimensions with smartphones and DSLR's allowing users to choose from a list of available image resolutions. It is therefore imperative for forensic algorithms such as resampling detection to scale…

Computer Vision and Pattern Recognition · Computer Science 2020-04-29 Mohit Lamba , Kaushik Mitra