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Given a small set of labeled data and a large set of unlabeled data, semi-supervised learning (SSL) attempts to leverage the location of the unlabeled datapoints in order to create a better classifier than could be obtained from supervised…

Machine Learning · Computer Science 2022-05-25 Michael C. Burkhart , Kyle Shan

The conventional supervised hashing methods based on classification do not entirely meet the requirements of hashing technique, but Linear Discriminant Analysis (LDA) does. In this paper, we propose to perform a revised LDA objective over…

Computer Vision and Pattern Recognition · Computer Science 2018-10-09 Di Hu , Feiping Nie , Xuelong Li

Deep hashing improves retrieval efficiency through compact binary codes, yet it introduces severe and often overlooked privacy risks. The ability to reconstruct original training data from hash codes could lead to serious threats such as…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Dongdong Zhao , Qiben Xu , Ranxin Fang , Baogang Song

Learning binary representation is essential to large-scale computer vision tasks. Most existing algorithms require a separate quantization constraint to learn effective hashing functions. In this work, we present Direct Binary Embedding…

Computer Vision and Pattern Recognition · Computer Science 2017-06-06 Liu Liu , Alireza Rahimpour , Ali Taalimi , Hairong Qi

Image hashing is a principled approximate nearest neighbor approach to find similar items to a query in a large collection of images. Hashing aims to learn a binary-output function that maps an image to a binary vector. For optimal…

Computer Vision and Pattern Recognition · Computer Science 2022-06-01 Khoa D. Doan , Peng Yang , Ping Li

With the advantage of low storage cost and high efficiency, hashing learning has received much attention in the domain of Big Data. In this paper, we propose a novel unsupervised hashing learning method to cope with this open problem to…

Computer Vision and Pattern Recognition · Computer Science 2020-09-29 Jun Yu , Xiao-Jun Wu

Hashing produces compact representations for documents, to perform tasks like classification or retrieval based on these short codes. When hashing is supervised, the codes are trained using labels on the training data. This paper first…

Computer Vision and Pattern Recognition · Computer Science 2017-08-11 Alexandre Sablayrolles , Matthijs Douze , Hervé Jégou , Nicolas Usunier

As hashing becomes an increasingly appealing technique for large-scale image retrieval, multi-label hashing is also attracting more attention for the ability to exploit multi-level semantic contents. In this paper, we propose a novel deep…

Computer Vision and Pattern Recognition · Computer Science 2021-02-03 Cheng Ma , Jiwen Lu , Jie Zhou

Cross-modal hashing has been receiving increasing interests for its low storage cost and fast query speed in multi-modal data retrievals. However, most existing hashing methods are based on hand-crafted or raw level features of objects,…

Machine Learning · Computer Science 2019-05-14 Xuanwu Liu , Guoxian Yu , Carlotta Domeniconi , Jun Wang , Yazhou Ren , Maozu Guo

Combinatorial optimization (CO) has been a hot research topic because of its theoretic and practical importance. As a classic CO problem, deep hashing aims to find an optimal code for each data from finite discrete possibilities, while the…

Computer Vision and Pattern Recognition · Computer Science 2021-07-14 Chaoyou Fu , Guoli Wang , Xiang Wu , Qian Zhang , Ran He

Many unsupervised hashing methods are implicitly established on the idea of reconstructing the input data, which basically encourages the hashing codes to retain as much information of original data as possible. However, this requirement…

Computer Vision and Pattern Recognition · Computer Science 2021-05-20 Zexuan Qiu , Qinliang Su , Zijing Ou , Jianxing Yu , Changyou Chen

Face image retrieval, which searches for images of the same identity from the query input face image, is drawing more attention as the size of the image database increases rapidly. In order to conduct fast and accurate retrieval, a compact…

Computer Vision and Pattern Recognition · Computer Science 2021-07-13 Young Kyun Jang , Nam Ik Cho

Due to their high retrieval efficiency and low storage cost, cross-modal hashing methods have attracted considerable attention. Generally, compared with shallow cross-modal hashing methods, deep cross-modal hashing methods can achieve a…

Information Retrieval · Computer Science 2019-07-30 Rong-Cheng Tu , Xian-Ling Mao , Bing Ma , Yong Hu , Tan Yan , Wei Wei , Heyan Huang

In recent years, hashing methods have been proved to be effective and efficient for the large-scale Web media search. However, the existing general hashing methods have limited discriminative power for describing fine-grained objects that…

Computer Vision and Pattern Recognition · Computer Science 2019-02-04 Sheng Jin , Hongxun Yao , Xiaoshuai Sun , Shangchen Zhou , Lei Zhang , Xiansheng Hua

The applications of traditional statistical feature selection methods to high-dimension, low sample-size data often struggle and encounter challenging problems, such as overfitting, curse of dimensionality, computational infeasibility, and…

Machine Learning · Statistics 2023-12-19 Kexuan Li , Fangfang Wang , Lingli Yang , Ruiqi Liu

Sharing images online poses security threats to a wide range of users due to the unawareness of privacy information. Deep features have been demonstrated to be a powerful representation for images. However, deep features usually suffer from…

Computer Vision and Pattern Recognition · Computer Science 2020-01-23 Chiranjibi Sitaula , Yong Xiang , Sunil Aryal , Xuequan Lu

Hyperspectral image analysis has become an important topic widely researched by the remote sensing community. Classification and segmentation of such imagery help understand the underlying materials within a scanned scene, since…

Computer Vision and Pattern Recognition · Computer Science 2020-12-02 Jakub Nalepa , Michal Myller , Yasuteru Imai , Ken-ichi Honda , Tomomi Takeda , Marek Antoniak

Supervised training of deep neural networks for classification typically relies on hard targets, which promote overconfidence and can limit calibration, generalization, and robustness. Self-distillation methods aim to mitigate this by…

Computer Vision and Pattern Recognition · Computer Science 2026-02-06 Anton Adelöw , Matteo Gamba , Atsuto Maki

Due to the availability of large-scale multi-modal data (e.g., satellite images acquired by different sensors, text sentences, etc) archives, the development of cross-modal retrieval systems that can search and retrieve semantically…

Computer Vision and Pattern Recognition · Computer Science 2022-01-21 Georgii Mikriukov , Mahdyar Ravanbakhsh , Begüm Demir

Hashing has attracted increasing research attentions in recent years due to its high efficiency of computation and storage in image retrieval. Recent works have demonstrated the superiority of simultaneous feature representations and hash…

Computer Vision and Pattern Recognition · Computer Science 2019-02-20 Lu Jin , Xiangbo Shu , Kai Li , Zechao Li , Guo-Jun Qi , Jinhui Tang