Search Results for author: Nikos Efthymiadis

Found 5 papers, 4 papers with code

ILIAS: Instance-Level Image retrieval At Scale

no code implementations17 Feb 2025 Giorgos Kordopatis-Zilos, Vladan Stojnić, Anna Manko, Pavel Šuma, Nikolaos-Antonios Ypsilantis, Nikos Efthymiadis, Zakaria Laskar, Jiří Matas, Ondřej Chum, Giorgos Tolias

An extensive benchmarking is performed with the following observations: i) models fine-tuned on specific domains, such as landmarks or products, excel in that domain but fail on ILIAS ii) learning a linear adaptation layer using multi-domain class supervision results in performance improvements, especially for vision-language models iii) local descriptors in retrieval re-ranking are still a key ingredient, especially in the presence of severe background clutter iv) the text-to-image performance of the vision-language foundation models is surprisingly close to the corresponding image-to-image case.

Benchmarking Image Retrieval +2

Composed Image Retrieval for Training-Free Domain Conversion

1 code implementation4 Dec 2024 Nikos Efthymiadis, Bill Psomas, Zakaria Laskar, Konstantinos Karantzalos, Yannis Avrithis, Ondřej Chum, Giorgos Tolias

This work addresses composed image retrieval in the context of domain conversion, where the content of a query image is retrieved in the domain specified by the query text.

Image Retrieval Language Modeling +3

Edge Augmentation for Large-Scale Sketch Recognition without Sketches

1 code implementation26 Feb 2022 Nikos Efthymiadis, Giorgos Tolias, Ondrej Chum

To bridge the domain gap we present a novel augmentation technique that is tailored to the task of learning sketch recognition from a training set of natural images.

Edge Detection Image to sketch recognition

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