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Credit card fraud remains a significant challenge due to class imbalance and fraudsters mimicking legitimate behavior. This study evaluates five machine learning models - Logistic Regression, Random Forest, XGBoost, K-Nearest Neighbors…

Machine Learning · Computer Science 2025-09-19 Iva Popova , Hamza A. A. Gardi

Fast k-Nearest Neighbor search over real-valued vector spaces (KNN) is an important algorithmic task for information retrieval and recommendation systems. We present a method for using reduced precision to represent vectors through…

Information Retrieval · Computer Science 2021-10-19 Anthony Ko , Iman Keivanloo , Vihan Lakshman , Eric Schkufza

Recent years have seen significant developments in the field of License Plate Recognition (LPR) through the integration of deep learning techniques and the increasing availability of training data. Nevertheless, reconstructing license…

Computer Vision and Pattern Recognition · Computer Science 2023-05-30 Valfride Nascimento , Rayson Laroca , Jorge de A. Lambert , William Robson Schwartz , David Menotti

The k-Nearest Neighbors (kNN) classifier is a fundamental non-parametric machine learning algorithm. However, it is well known that it suffers from the curse of dimensionality, which is why in practice one often applies a kNN classifier on…

Machine Learning · Computer Science 2020-10-16 Luka Rimanic , Cedric Renggli , Bo Li , Ce Zhang

Computer vision coupled with Deep Learning (DL) techniques bring out a substantial prospect in the field of traffic control, monitoring and law enforcing activities. This paper presents a YOLOv4 object detection model in which the…

Computer Vision and Pattern Recognition · Computer Science 2022-02-25 Md. Saif Hassan Onim , Muhaiminul Islam Akash , Mahmudul Haque , Raiyan Ibne Hafiz

We present a simple few-shot named entity recognition (NER) system based on nearest neighbor learning and structured inference. Our system uses a supervised NER model trained on the source domain, as a feature extractor. Across several test…

Computation and Language · Computer Science 2020-10-07 Yi Yang , Arzoo Katiyar

In recent years, many deep-learning based models are proposed for text classification. This kind of models well fits the training set from the statistical point of view. However, it lacks the capacity of utilizing instance-level information…

Computation and Language · Computer Science 2017-08-29 Zhiguo Wang , Wael Hamza , Linfeng Song

License Plate Recognition Systems are used to determine the license plate number of a vehicle. The current system mainly uses Optical Character Recognition to recognize the number plate. There are several problems to this system. Some of…

Computer Vision and Pattern Recognition · Computer Science 2015-06-11 Jani Biju Babjan

The K-nearest neighbor (KNN) classifier is one of the simplest and most common classifiers, yet its performance competes with the most complex classifiers in the literature. The core of this classifier depends mainly on measuring the…

Demands for minimum parameter setup in machine learning models are desirable to avoid time-consuming optimization processes. The $k$-Nearest Neighbors is one of the most effective and straightforward models employed in numerous problems.…

Machine Learning · Computer Science 2022-10-03 Danilo Samuel Jodas , Leandro Aparecido Passos , Ahsan Adeel , João Paulo Papa

Various kinds of k-nearest neighbor (KNN) based classification methods are the bases of many well-established and high-performance pattern-recognition techniques, but both of them are vulnerable to their parameter choice. Essentially, the…

Artificial Intelligence · Computer Science 2016-12-08 Ji Feng , Qingsheng Zhu , Jinlong Huang , Lijun Yang

Nearest neighbor (kNN) methods have been gaining popularity in recent years in light of advances in hardware and efficiency of algorithms. There is a plethora of methods to choose from today, each with their own advantages and…

Machine Learning · Computer Science 2017-03-01 Daniel Zoran , Balaji Lakshminarayanan , Charles Blundell

The diversity in length constitutes a significant characteristic of text. Due to the long-tail distribution of text lengths, most existing methods for scene text recognition (STR) only work well on short or seen-length text, lacking the…

Computer Vision and Pattern Recognition · Computer Science 2023-08-25 Changxu Cheng , Peng Wang , Cheng Da , Qi Zheng , Cong Yao

This paper presents a recognition system for handwritten Pashto letters. However, handwritten character recognition is a challenging task. These letters not only differ in shape and style but also vary among individuals. The recognition…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Sulaiman Khan , Hazrat Ali , Zahid Ullah , Nasru Minallah , Shahid Maqsood , Abdul Hafeez

The $k$-nearest neighbor ($k$-NN) algorithm is one of the most popular methods for nonparametric classification. However, a relevant limitation concerns the definition of the number of neighbors $k$. This parameter exerts a direct impact on…

Machine Learning · Computer Science 2024-09-10 Alexandre Luís Magalhães Levada , Frank Nielsen , Michel Ferreira Cardia Haddad

Poor roads are a major issue for cars, drivers, and pedestrians since they are a major cause of vehicle damage and can occasionally be quite dangerous for both groups of people (pedestrians and drivers), this makes road surface condition…

Machine Learning · Computer Science 2024-05-28 Makgotso Jacqueline Maotwana

A $k$-nearest neighbor ($k$NN) query determines the $k$ nearest points, using distance metrics, from a specific location. An all $k$-nearest neighbor (A$k$NN) query constitutes a variation of a $k$NN query and retrieves the $k$ nearest…

Databases · Computer Science 2014-02-28 Nikolaos Nodarakis , Spyros Sioutas , Dimitrios Tsoumakos , Giannis Tzimas , Evaggelia Pitoura

An Automatic License Plate Recognition (ALPR) system constitutes a crucial element in an intelligent traffic management system. However, the detection of Bangla license plates remains challenging because of the complicated character scheme…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Nayeb Hasin , Md. Arafath Rahman Nishat , Mainul Islam , Khandakar Shakib Al Hasan , Asif Newaz

Recognizing car license plates in natural scene images is an important yet still challenging task in realistic applications. Many existing approaches perform well for license plates collected under constrained conditions, eg, shooting in…

Computer Vision and Pattern Recognition · Computer Science 2020-06-11 Linjiang Zhang , Peng Wang , Hui Li , Zhen Li , Chunhua Shen , Yanning Zhang

K-Nearest Neighbors (KNN) is one of the most used ML classifiers. However, if we observe closely, standard distance-weighted KNN and relative variants assume all 'k' neighbors are equally reliable. In heterogeneous feature space, this…

Machine Learning · Computer Science 2025-12-11 Kumarjit Pathak , Karthik K , Sachin Madan , Jitin Kapila
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