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Algorithms, Volume 17, Issue 1

January 2024 - 49 articles

Cover Story: We present a general version of the polygonal fitting problem called Unconstrained Polygonal Fitting (UPF). Our goal is to represent a given 2D shape S with an N-vertex polygonal curve P with a known number of vertices, so that the Intersection over Union (IoU) metric between S and P is maximized without any assumption of the location of the N-vertices of P that can be placed anywhere in the 2D space. The resulting solutions of the UPF may approximate the given curve better than the solutions of the classical polygonal approximation problem, where the vertices are constrained to belong to the boundary of the given 2D shape. For a given number of vertices N, a Particle Swarm Optimization method is used to maximize the IoU metric, which yields almost optimal solutions. View the paper
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Articles (49)

  • Article
  • Open Access
5 Citations
2,905 Views
17 Pages

18 January 2024

Pedestrian detection has always been a difficult and hot spot in computer vision research. At the same time, pedestrian detection technology plays an important role in many applications, such as intelligent transportation and security monitoring. In...

  • Article
  • Open Access
2 Citations
2,707 Views
11 Pages

17 January 2024

Simulation of atomic force microscopy (AFM) computationally emulates experimental scanning of a biomolecular structure to produce topographic images that can be correlated with measured images. Its application to the enormous amount of available high...

  • Article
  • Open Access
1 Citations
5,882 Views
22 Pages

16 January 2024

In recent years, with the rapid advancements in Natural Language Processing (NLP) technologies, large models have become widespread. Traditional reinforcement learning algorithms have also started experimenting with language models to optimize traini...

  • Article
  • Open Access
4 Citations
2,781 Views
18 Pages

Reducing Q-Value Estimation Bias via Mutual Estimation and Softmax Operation in MADRL

  • Zheng Li,
  • Xinkai Chen,
  • Jiaqing Fu,
  • Ning Xie and
  • Tingting Zhao

16 January 2024

With the development of electronic game technology, the content of electronic games presents a larger number of units, richer unit attributes, more complex game mechanisms, and more diverse team strategies. Multi-agent deep reinforcement learning shi...

  • Article
  • Open Access
13 Citations
3,874 Views
18 Pages

An Interactive Digital-Twin Model for Virtual Reality Environments to Train in the Use of a Sensorized Upper-Limb Prosthesis

  • Alessio Cellupica,
  • Marco Cirelli,
  • Giovanni Saggio,
  • Emanuele Gruppioni and
  • Pier Paolo Valentini

14 January 2024

In recent years, the boost in the development of hardware and software resources for building virtual reality environments has fuelled the development of tools to support training in different disciplines. The purpose of this work is to discuss a com...

  • Article
  • Open Access
19 Citations
3,737 Views
23 Pages

Ensemble Heuristic–Metaheuristic Feature Fusion Learning for Heart Disease Diagnosis Using Tabular Data

  • Mohammad Shokouhifar,
  • Mohamad Hasanvand,
  • Elaheh Moharamkhani and
  • Frank Werner

14 January 2024

Heart disease is a global health concern of paramount importance, causing a significant number of fatalities and disabilities. Precise and timely diagnosis of heart disease is pivotal in preventing adverse outcomes and improving patient well-being, t...

  • Article
  • Open Access
1 Citations
3,089 Views
20 Pages

A Quantum-Inspired Predator–Prey Algorithm for Real-Parameter Optimization

  • Azal Ahmad Khan,
  • Salman Hussain and
  • Rohitash Chandra

12 January 2024

Quantum computing has opened up various opportunities for the enhancement of computational power in the coming decades. We can design algorithms inspired by the principles of quantum computing, without implementing in quantum computing infrastructure...

  • Article
  • Open Access
13 Citations
6,151 Views
20 Pages

Image Watermarking Using Discrete Wavelet Transform and Singular Value Decomposition for Enhanced Imperceptibility and Robustness

  • Mahbuba Begum,
  • Sumaita Binte Shorif,
  • Mohammad Shorif Uddin,
  • Jannatul Ferdush,
  • Tony Jan,
  • Alistair Barros and
  • Md Whaiduzzaman

12 January 2024

Digital multimedia elements such as text, image, audio, and video can be easily manipulated because of the rapid rise of multimedia technology, making data protection a prime concern. Hence, copyright protection, content authentication, and integrity...

  • Article
  • Open Access
4 Citations
4,757 Views
18 Pages

GPU Algorithms for Structured Sparse Matrix Multiplication with Diagonal Storage Schemes

  • Sardar Anisul Haque,
  • Mohammad Tanvir Parvez and
  • Shahadat Hossain

12 January 2024

Matrix–matrix multiplication is of singular importance in linear algebra operations with a multitude of applications in scientific and engineering computing. Data structures for storing matrix elements are designed to minimize overhead informat...

  • Article
  • Open Access
12 Citations
6,561 Views
16 Pages

10 January 2024

Ambiguous optical illusions have been a paradigmatic object of fascination, research and inspiration in arts, psychology and video games. However, accurate computational models of perception of ambiguous figures have been elusive. In this paper, we d...

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Algorithms - ISSN 1999-4893