Benchmarking of Different YOLO Models for CAPTCHAs Detection and Classification

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Hauptverfasser: Wysocki, Mikołaj, Gierszal, Henryk, Tyczka, Piotr, Karagiorgou, Sophia, Pantelis, George
Format: Preprint
Veröffentlicht: 2025
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author Wysocki, Mikołaj
Gierszal, Henryk
Tyczka, Piotr
Karagiorgou, Sophia
Pantelis, George
author_facet Wysocki, Mikołaj
Gierszal, Henryk
Tyczka, Piotr
Karagiorgou, Sophia
Pantelis, George
contents This paper provides an analysis and comparison of the YOLOv5, YOLOv8 and YOLOv10 models for webpage CAPTCHAs detection using the datasets collected from the web and darknet as well as synthetized data of webpages. The study examines the nano (n), small (s), and medium (m) variants of YOLO architectures and use metrics such as Precision, Recall, F1 score, mAP@50 and inference speed to determine the real-life utility. Additionally, the possibility of tuning the trained model to detect new CAPTCHA patterns efficiently was examined as it is a crucial part of real-life applications. The image slicing method was proposed as a way to improve the metrics of detection on oversized input images which can be a common scenario in webpages analysis. Models in version nano achieved the best results in terms of speed, while more complexed architectures scored better in terms of other metrics.
format Preprint
id arxiv_https___arxiv_org_abs_2502_13740
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Benchmarking of Different YOLO Models for CAPTCHAs Detection and Classification
Wysocki, Mikołaj
Gierszal, Henryk
Tyczka, Piotr
Karagiorgou, Sophia
Pantelis, George
Computer Vision and Pattern Recognition
This paper provides an analysis and comparison of the YOLOv5, YOLOv8 and YOLOv10 models for webpage CAPTCHAs detection using the datasets collected from the web and darknet as well as synthetized data of webpages. The study examines the nano (n), small (s), and medium (m) variants of YOLO architectures and use metrics such as Precision, Recall, F1 score, mAP@50 and inference speed to determine the real-life utility. Additionally, the possibility of tuning the trained model to detect new CAPTCHA patterns efficiently was examined as it is a crucial part of real-life applications. The image slicing method was proposed as a way to improve the metrics of detection on oversized input images which can be a common scenario in webpages analysis. Models in version nano achieved the best results in terms of speed, while more complexed architectures scored better in terms of other metrics.
title Benchmarking of Different YOLO Models for CAPTCHAs Detection and Classification
topic Computer Vision and Pattern Recognition
url https://arxiv.org/abs/2502.13740