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Instance-level image retrieval aims to find images containing the same object as a given query, despite variations in size, position, or appearance. To address this challenging task, we propose Patchify, a simple yet effective patch-wise…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Wonseok Choi , Sohwi Lim , Nam Hyeon-Woo , Moon Ye-Bin , Dong-Ju Jeong , Jinyoung Hwang , Tae-Hyun Oh

Code search is to search reusable code snippets from source code corpus based on natural languages queries. Deep learning-based methods of code search have shown promising results. However, previous methods focus on retrieval accuracy but…

Software Engineering · Computer Science 2022-04-01 Wenchao Gu , Yanlin Wang , Lun Du , Hongyu Zhang , Shi Han , Dongmei Zhang , Michael R. Lyu

The promise of multi-wavelength astronomy has been tempered by the large disparity in sensitivity and resolution between different wavelength regimes. Here we present a statistical approach which attempts to overcome this by fitting…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-18 I. G. Roseboom , P . N. Best

Compression-based similarity measures are effectively employed in applications on diverse data types with a basically parameter-free approach. Nevertheless, there are problems in applying these techniques to medium-to-large datasets which…

Machine Learning · Statistics 2012-10-03 Daniele Cerra , Mihai Datcu

Estimating the true background in an astronomical image is fundamental to detecting faint sources. In a typical low-photon count astronomical image, such as in the far and near-ultraviolet wavelength range, conventional methods relying on…

Instrumentation and Methods for Astrophysics · Physics 2024-11-27 Pushpak Pandey , Kanak Saha

Referring detection refers to locate the target referred by natural languages, which has recently attracted growing research interests. However, existing datasets are limited to ground images with large object centered in relative small…

Computer Vision and Pattern Recognition · Computer Science 2026-04-24 Guyue Hu , Hao Song , Yuxing Tong , Duzhi Yuan , Dengdi Sun , Aihua Zheng , Chenglong Li , Jin Tang

It is demonstrated that non-constant kernel solution, that can fit the spatial variations of the kernel can be obtained with minimum computing time. The CPU cost required with this new extension of the image subtraction method is almost the…

Astrophysics · Physics 2007-05-23 C. Alard

Image-based retrieval in large Earth observation archives is challenging because one needs to navigate across thousands of candidate matches only with the query image as a guide. By using text as information supporting the visual query, the…

Computer Vision and Pattern Recognition · Computer Science 2024-10-28 Li Mi , Xianjie Dai , Javiera Castillo-Navarro , Devis Tuia

The progress of composed image retrieval (CIR), a popular research direction in image retrieval, where a combined visual and textual query is used, is held back by the absence of high-quality training and evaluation data. We introduce a new…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Bill Psomas , George Retsinas , Nikos Efthymiadis , Panagiotis Filntisis , Yannis Avrithis , Petros Maragos , Ondrej Chum , Giorgos Tolias

We have developed a method that maps large astronomical images onto a two-dimensional map and clusters them. A combination of various state-of-the-art machine learning (ML) algorithms is used to develop a fully unsupervised image quality…

Instrumentation and Methods for Astrophysics · Physics 2021-04-28 Hossen Teimoorinia , Sara Shishehchi , Ahnaf Tazwar , Ping Lin , Finn Archinuk , Stephen D. J. Gwyn , J. J. Kavelaars

In this work we present a new algorithm for data deconvolution that allows the retrieval of the target function with super-resolution with a simple approach that after a precis e measurement of the instrument response function (IRF), the…

Computer Vision and Pattern Recognition · Computer Science 2018-12-07 Sandra Martínez , Oscar E. Martínez

In astronomical imaging, the low photon count of exposures necessitates extensive post-processing steps, including contamination removal and denoising. This paper evaluates deep-learning denoising methods that can be trained without clean…

Instrumentation and Methods for Astrophysics · Physics 2026-04-21 Omid Vaheb , Sebastien Fabbro , Stark Draper

Crossmatching catalogs at different wavelengths is a difficult problem in astronomy, especially when the objects are not point-like. At radio wavelengths an object can have several components corresponding, for example, to a core and lobes.…

Instrumentation and Methods for Astrophysics · Physics 2015-05-05 Dongwei Fan , Tamás Budavári , Ray P. Norris , Andrew M. Hopkins

Content-based image retrieval (CBIR) is a task of retrieving images from their contents. Since retrieval process is a time-consuming task in large image databases, acceleration methods can be very useful. This paper presents a novel method…

Image and Video Processing · Electrical Eng. & Systems 2019-12-24 Sadegh Fadaei , Abdolreza Rashno , Elyas Rashno

This paper describes two approaches for content-based image retrieval and pattern spotting in document images using deep learning. The first approach uses a pre-trained CNN model to cope with the lack of training data, which is fine-tuned…

Computer Vision and Pattern Recognition · Computer Science 2019-07-25 Kelly Lais Wiggers , Alceu de Souza Britto Junior , Alessandro Lameiras Koerich , Laurent Heutte , Luiz Eduardo Soares de Oliveira

Effective image deblurring typically relies on large and fully paired datasets of blurred and corresponding sharp images. However, obtaining such accurately aligned data in the real world poses a number of difficulties, limiting the…

Image and Video Processing · Electrical Eng. & Systems 2025-10-21 Alok Panigrahi , Jayaprakash Katual , Satish Mulleti

Remote sensing composed image retrieval (RSCIR) enables search in large satellite image archives using composed queries that combine a reference image with a textual modifier. Although RSCIR offers a flexible interface for expressing…

In this paper, we introduce an optimum approach for querying similar images on large digital-image databases. Our work is based on RBIR (region-based image retrieval) method which uses multiple regions as the key to retrieval images. This…

Computer Vision and Pattern Recognition · Computer Science 2015-06-03 Thanh The Van , Thanh Manh Le

Modern astronomical surveys are producing datasets of unprecedented size and richness, increasing the potential for high-impact scientific discovery. This possibility, coupled with the challenge of exploring a large number of sources, has…

Instrumentation and Methods for Astrophysics · Physics 2024-04-01 Verlon Etsebeth , Michelle Lochner , Mike Walmsley , Margherita Grespan

Automated source extraction and parameterization represents a crucial challenge for the next-generation radio interferometer surveys, such as those performed with the Square Kilometre Array (SKA) and its precursors. In this paper we present…

Instrumentation and Methods for Astrophysics · Physics 2016-05-09 S. Riggi , A. Ingallinera , P. Leto , F. Cavallaro , F. Bufano , F. Schillirò , C. Trigilio , G. Umana , C. S. Buemi , R. P. Norris