no code implementations • 25 Sep 2023 • Firas Laakom, Fahad Sohrab, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
We show that such regularizers improve performance.
no code implementations • ICLR Workshop EBM 2021 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
Energy-based learning is a powerful learning paradigm that encapsulates various discriminative and generative approaches.
no code implementations • 3 Jan 2023 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
At each optimization step, neurons at a given layer receive feedback from neurons belonging to higher layers of the hierarchy.
no code implementations • 24 Nov 2022 • Benjamin Kiefer, Matej Kristan, Janez Perš, Lojze Žust, Fabio Poiesi, Fabio Augusto de Alcantara Andrade, Alexandre Bernardino, Matthew Dawkins, Jenni Raitoharju, Yitong Quan, Adem Atmaca, Timon Höfer, Qiming Zhang, Yufei Xu, Jing Zhang, DaCheng Tao, Lars Sommer, Raphael Spraul, Hangyue Zhao, Hongpu Zhang, Yanyun Zhao, Jan Lukas Augustin, Eui-ik Jeon, Impyeong Lee, Luca Zedda, Andrea Loddo, Cecilia Di Ruberto, Sagar Verma, Siddharth Gupta, Shishir Muralidhara, Niharika Hegde, Daitao Xing, Nikolaos Evangeliou, Anthony Tzes, Vojtěch Bartl, Jakub Špaňhel, Adam Herout, Neelanjan Bhowmik, Toby P. Breckon, Shivanand Kundargi, Tejas Anvekar, Chaitra Desai, Ramesh Ashok Tabib, Uma Mudengudi, Arpita Vats, Yang song, Delong Liu, Yonglin Li, Shuman Li, Chenhao Tan, Long Lan, Vladimir Somers, Christophe De Vleeschouwer, Alexandre Alahi, Hsiang-Wei Huang, Cheng-Yen Yang, Jenq-Neng Hwang, Pyong-Kun Kim, Kwangju Kim, Kyoungoh Lee, Shuai Jiang, Haiwen Li, Zheng Ziqiang, Tuan-Anh Vu, Hai Nguyen-Truong, Sai-Kit Yeung, Zhuang Jia, Sophia Yang, Chih-Chung Hsu, Xiu-Yu Hou, Yu-An Jhang, Simon Yang, Mau-Tsuen Yang
The 1$^{\text{st}}$ Workshop on Maritime Computer Vision (MaCVi) 2023 focused on maritime computer vision for Unmanned Aerial Vehicles (UAV) and Unmanned Surface Vehicle (USV), and organized several subchallenges in this domain: (i) UAV-based Maritime Object Detection, (ii) UAV-based Maritime Object Tracking, (iii) USV-based Maritime Obstacle Segmentation and (iv) USV-based Maritime Obstacle Detection.
no code implementations • 10 Nov 2022 • Mehdi Rafiei, Jenni Raitoharju, Alexandros Iosifidis
X-ray imaging technology has been used for decades in clinical tasks to reveal the internal condition of different organs, and in recent years, it has become more common in other areas such as industry, security, and geography.
no code implementations • 26 Sep 2022 • Mikko Impiö, Pekka Härmä, Anna Tammilehto, Saku Anttila, Jenni Raitoharju
Therefore, full segmentation maps are expensive to produce, and training data is often sparse, point-like, and limited to areas accessible by foot.
no code implementations • 22 Sep 2022 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
In this paper, we propose an approach that builds on top of BoF pooling to boost its efficiency by ensuring that the items of the learned dictionary are non-redundant.
1 code implementation • 1 May 2022 • Jenni Raitoharju, Alexandros Iosifidis
Focusing on small-scale one-class classification, our analysis and experimental results show that the new formulation provides approaches to regularize, adjust the rank, and incorporate additional information into the kernel itself, leading to improved one-class classification accuracy.
no code implementations • 5 Apr 2022 • Anssi Männistö, Mert Seker, Alexandros Iosifidis, Jenni Raitoharju
Applying machine learning tools to digitized image archives has a potential to revolutionize quantitative research of visual studies in humanities and social sciences.
no code implementations • 9 Feb 2022 • Firas Laakom, Jenni Raitoharju, Nikolaos Passalis, Alexandros Iosifidis, Moncef Gabbouj
In this paper, we consider the problem of non-linear dimensionality reduction under uncertainty, both from a theoretical and algorithmic perspectives.
no code implementations • 9 Feb 2022 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
We tested our approach across different tasks: dimensionality reduction using three different dataset, image compression using the MNIST dataset, and image denoising using fashion MNIST.
1 code implementation • 10 Nov 2021 • Firas Laakom, Jenni Raitoharju, Jarno Nikkanen, Alexandros Iosifidis, Moncef Gabbouj
We test this approach on the proposed method and show that it can indeed be used to avoid several extreme error cases and, thus, improves the practicality of the proposed technique.
1 code implementation • 10 Nov 2021 • Firas Laakom, Kateryna Chumachenko, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
Based on this idea, we propose to reformulate the attention mechanism in CNNs to learn to ignore instead of learning to attend.
no code implementations • 29 Sep 2021 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
Neural networks are composed of multiple layers arranged in a hierarchical structure jointly trained with a gradient-based optimization, where the errors are back-propagated from the last layer back to the first one.
no code implementations • 16 Jun 2021 • Mert Seker, Anssi Männistö, Alexandros Iosifidis, Jenni Raitoharju
Identifying the main character in images plays an important role in traditional photographic studies and media analysis, but the task is performed manually and can be slow and laborious.
no code implementations • 10 Jun 2021 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
We study the diversity of the features learned by a two-layer neural network trained with the least squares loss.
1 code implementation • 29 Apr 2021 • Fahad Sohrab, Alexandros Iosifidis, Moncef Gabbouj, Jenni Raitoharju
In this paper, we propose a novel subspace learning framework for one-class classification.
1 code implementation • 11 Mar 2021 • Mert Seker, Anssi Männistö, Alexandros Iosifidis, Jenni Raitoharju
The World Health Organization (WHO) has provided guidelines on how to reduce the spread of the virus and one of the most important measures is social distancing.
no code implementations • 9 Feb 2021 • Kateryna Chumachenko, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
In this paper, we propose a method for ensembling the outputs of multiple object detectors for improving detection performance and precision of bounding boxes on image data.
no code implementations • 1 Jan 2021 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
During the last decade, neural networks have been intensively used to tackle various problems and they have often led to state-of-the-art results.
no code implementations • 23 Nov 2020 • Mohammad Soltanian, Junaid Malik, Jenni Raitoharju, Alexandros Iosifidis, Serkan Kiranyaz, Moncef Gabbouj
Automatic classification of speech commands has revolutionized human computer interactions in robotic applications.
no code implementations • 1 Sep 2020 • Firas Laakom, Jenni Raitoharju, Nikolaos Passalis, Alexandros Iosifidis, Moncef Gabbouj
spectral-based subspace learning is a common data preprocessing step in many machine learning pipelines.
no code implementations • 28 Aug 2020 • Jorge Peña Queralta, Jussi Taipalmaa, Bilge Can Pullinen, Victor Kathan Sarker, Tuan Nguyen Gia, Hannu Tenhunen, Moncef Gabbouj, Jenni Raitoharju, Tomi Westerlund
Autonomous or teleoperated robots have been playing increasingly important roles in civil applications in recent years.
no code implementations • 20 Jul 2020 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Jarno Nikkanen, Moncef Gabbouj
Computational color constancy is a preprocessing step used in many camera systems.
no code implementations • 7 May 2020 • Jorge Peña Queralta, Jenni Raitoharju, Tuan Nguyen Gia, Nikolaos Passalis, Tomi Westerlund
Rescue vessels are the main actors in maritime safety and rescue operations.
no code implementations • 6 May 2020 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Uygar Tuna, Jarno Nikkanen, Moncef Gabbouj
In this paper, we propose a novel unsupervised color constancy method, called Probabilistic Color Constancy (PCC).
no code implementations • 8 Apr 2020 • Lei Xu, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
The proposed method is based on a probabilistic model for defining the weights of individual samples in a weighted multi-label LDA approach.
no code implementations • 25 Mar 2020 • Ali Senhaji, Jenni Raitoharju, Moncef Gabbouj, Alexandros Iosifidis
The most common approach in multi-domain learning is to form a domain agnostic model, the parameters of which are shared among all domains, and learn a small number of extra domain-specific parameters for each individual new domain.
1 code implementation • 20 Mar 2020 • Fahad Sohrab, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
In this paper, we propose a novel method for transforming data into a low-dimensional space optimized for one-class classification.
no code implementations • 12 Feb 2020 • Fahad Sohrab, Jenni Raitoharju
One-class classification models are traditionally trained with much fewer samples and they can provide a mechanism to indicate samples potentially belonging to the rare classes for human inspection.
no code implementations • 11 Feb 2020 • Kateryna Chumachenko, Jenni Raitoharju, Moncef Gabbouj, Alexandros Iosifidis
This paper proposes an incremental solution to Fast Subclass Discriminant Analysis (fastSDA).
no code implementations • 5 Feb 2020 • Johanna Ärje, Claus Melvad, Mads Rosenhøj Jeppesen, Sigurd Agerskov Madsen, Jenni Raitoharju, Maria Strandgård Rasmussen, Alexandros Iosifidis, Ville Tirronen, Kristian Meissner, Moncef Gabbouj, Toke Thomas Høye
We use this database to test the classification accuracy i. e. how well the species identity of a specimen can be predicted from images taken by the machine.
1 code implementation • 23 Oct 2019 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Jarno Nikkanen, Moncef Gabbouj
In this paper, we describe a new large dataset for illumination estimation.
Few-Shot Camera-Adaptive Color Constancy Image Declipping +1
no code implementations • 19 Aug 2019 • Anton Muravev, Jenni Raitoharju, Moncef Gabbouj
Our matrix of probabilities is equivalent to the population of models, but allows for discovery of structural irregularities, while being simple to interpret and analyze.
no code implementations • 13 Aug 2019 • Jenni Raitoharju, Alexandros Iosifidis
In this paper, we carry out null space analysis for Class-Specific Discriminant Analysis (CSDA) and formulate a number of solutions based on the analysis.
no code implementations • 20 Jun 2019 • Mehmet Yamac, Mete Ahishali, Nikolaos Passalis, Jenni Raitoharju, Bulent Sankur, Moncef Gabbouj
Security monitoring via ubiquitous cameras and their more extended in intelligent buildings stand to gain from advances in signal processing and machine learning.
1 code implementation • 11 Jun 2019 • Firas Laakom, Nikolaos Passalis, Jenni Raitoharju, Jarno Nikkanen, Anastasios Tefas, Alexandros Iosifidis, Moncef Gabbouj
To further improve the illumination estimation accuracy, we propose a novel attention mechanism for the BoCF model with two variants based on self-attention.
no code implementations • 4 Jun 2019 • Firas Laakom, Jenni Raitoharju, Alexandros Iosifidis, Jarno Nikkanen, Moncef Gabbouj
In this paper, we study the importance of pre-training for the generalization capability in the color constancy problem.
1 code implementation • 2 May 2019 • Kateryna Chumachenko, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
We show that by exploiting the structure of the between-class Laplacian matrix, the eigendecomposition step can be substituted with a much faster process.
1 code implementation • 22 Apr 2019 • Kateryna Chumachenko, Anssi Männistö, Alexandros Iosifidis, Jenni Raitoharju
In this paper, we demonstrate the benefits of using state-of-the-art machine learning methods in the analysis of historical photo archives.
1 code implementation • 16 Apr 2019 • Fahad Sohrab, Jenni Raitoharju, Alexandros Iosifidis, Moncef Gabbouj
In this paper, we propose a novel method for projecting data from multiple modalities to a new subspace optimized for one-class classification.
1 code implementation • 12 Feb 2018 • Fahad Sohrab, Jenni Raitoharju, Moncef Gabbouj, Alexandros Iosifidis
The method iteratively optimizes the data mapping along with data description in order to define a compact class representation in a low-dimensional feature space.
no code implementations • 23 Aug 2017 • Johanna Ärje, Jenni Raitoharju, Alexandros Iosifidis, Ville Tirronen, Kristian Meissner, Moncef Gabbouj, Serkan Kiranyaz, Salme Kärkkäinen
Contrary to previous findings in the literature, we find that for machines following a typical flat classification approach commonly used in machine learning performs better than forcing machines to adopt a hierarchical, local per parent node approach used by human taxonomic experts ($\overline{CE}=13. 8\%$).
no code implementations • 21 Jun 2016 • Honglei Zhang, Jenni Raitoharju, Serkan Kiranyaz, Moncef Gabbouj
Graph clustering is an important technique to understand the relationships between the vertices in a big graph.
Social and Information Networks Physics and Society