Search Results for author: Konstantinos Makantasis

Found 24 papers, 4 papers with code

Simulator-Free Visual Domain Randomization via Video Games

1 code implementation2 Feb 2024 Chintan Trivedi, Nemanja Rašajski, Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

In a more challenging setting, BehAVE manages to improve the zero-shot transferability of foundation models to unseen FPS games (up to 22%) even when trained on a game of a different genre (Minecraft).

FPS Games Video Understanding

Towards General Game Representations: Decomposing Games Pixels into Content and Style

no code implementations20 Jul 2023 Chintan Trivedi, Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

On-screen game footage contains rich contextual information that players process when playing and experiencing a game.

From the Lab to the Wild: Affect Modeling via Privileged Information

no code implementations18 May 2023 Konstantinos Makantasis, Kosmas Pinitas, Antonios Liapis, Georgios N. Yannakakis

Privileged information enables affect models to be trained across multiple modalities available in a lab, and ignore, without significant performance drops, those modalities that are not available when they operate in the wild.

The Invariant Ground Truth of Affect

no code implementations14 Oct 2022 Konstantinos Makantasis, Kosmas Pinitas, Antonios Liapis, Georgios N. Yannakakis

In particular, we assume that the ground truth of affect can be found in the causal relationships between elicitation, manifestation and annotation that remain \emph{invariant} across tasks and participants.

Outlier Detection

Supervised Contrastive Learning for Affect Modelling

1 code implementation25 Aug 2022 Kosmas Pinitas, Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

Affect modeling is viewed, traditionally, as the process of mapping measurable affect manifestations from multiple modalities of user input to affect labels.

Contrastive Learning

Automatic inspection of cultural monuments using deep and tensor-based learning on hyperspectral imagery

no code implementations5 Jul 2022 Ioannis N. Tzortzis, Ioannis Rallis, Konstantinos Makantasis, Anastasios Doulamis, Nikolaos Doulamis, Athanasios Voulodimos

In Cultural Heritage, hyperspectral images are commonly used since they provide extended information regarding the optical properties of materials.

Game State Learning via Game Scene Augmentation

no code implementations4 Jul 2022 Chintan Trivedi, Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

Having access to accurate game state information is of utmost importance for any artificial intelligence task including game-playing, testing, player modeling, and procedural content generation.

Contrastive Learning Image Augmentation +1

Revisiting lp-constrained Softmax Loss: A Comprehensive Study

1 code implementation20 Jun 2022 Chintan Trivedi, Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

Normalization is a vital process for any machine learning task as it controls the properties of data and affects model performance at large.

Classification Image Classification

Learning Task-Independent Game State Representations from Unlabeled Images

no code implementations13 Jun 2022 Chintan Trivedi, Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

We train an image encoder with three widely used SSL algorithms using solely the raw frames, and then attempt to recover the internal state variables from the learned representations.

Image Classification Self-Supervised Learning

RankNEAT: Outperforming Stochastic Gradient Search in Preference Learning Tasks

no code implementations14 Apr 2022 Kosmas Pinitas, Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

Stochastic gradient descent (SGD) is a premium optimization method for training neural networks, especially for learning objectively defined labels such as image objects and events.

feature selection

AffRankNet+: Ranking Affect Using Privileged Information

no code implementations12 Aug 2021 Konstantinos Makantasis

Many of the affect modelling tasks present an asymmetric distribution of information between training and test time; additional information is given about the training data, which is not available at test time.

Rank-R FNN: A Tensor-Based Learning Model for High-Order Data Classification

no code implementations11 Apr 2021 Konstantinos Makantasis, Alexandros Georgogiannis, Athanasios Voulodimos, Ioannis Georgoulas, Anastasios Doulamis, Nikolaos Doulamis

We hereby propose the Rank-R Feedforward Neural Network (FNN), a tensor-based nonlinear learning model that imposes Canonical/Polyadic decomposition on its parameters, thereby offering two core advantages compared to typical machine learning methods.

BIG-bench Machine Learning General Classification

The Pixels and Sounds of Emotion: General-Purpose Representations of Arousal in Games

no code implementations26 Jan 2021 Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

What if emotion could be captured in a general and subject-agnostic fashion?

Human-Computer Interaction

Space-Time Domain Tensor Neural Networks: An Application on Human Pose Classification

no code implementations17 Apr 2020 Konstantinos Makantasis, Athanasios Voulodimos, Anastasios Doulamis, Nikolaos Bakalos, Nikolaos Doulamis

Recent advances in sensing technologies require the design and development of pattern recognition models capable of processing spatiotemporal data efficiently.

General Classification

Deep Reinforcement-Learning-based Driving Policy for Autonomous Road Vehicles

no code implementations10 Jul 2019 Konstantinos Makantasis, Maria Kontorinaki, Ioannis Nikolos

To the best of our knowledge, this is one of the first approaches that propose a reinforcement learning driving policy for mixed driving environments.

Autonomous Vehicles reinforcement-learning +1

From Pixels to Affect: A Study on Games and Player Experience

no code implementations4 Jul 2019 Konstantinos Makantasis, Antonios Liapis, Georgios N. Yannakakis

Is it possible to predict the affect of a user just by observing her behavioral interaction through a video?

A Deep Reinforcement Learning Driving Policy for Autonomous Road Vehicles

no code implementations22 May 2019 Konstantinos Makantasis, Maria Kontorinaki, Ioannis Nikolos

This work regards our preliminary investigation on the problem of path planning for autonomous vehicles that move on a freeway.

Robotics

Tensor-Based Classifiers for Hyperspectral Data Analysis

no code implementations24 Sep 2017 Konstantinos Makantasis, Anastasios Doulamis, Nikolaos Doulamis, Antonis Nikitakis

Then, we introduce learning algorithms to train both the linear and the non-linear classifier in a way to i) to minimize the error over the training samples and ii) the weight coefficients satisfies the {\it rank}-1 canonical decomposition property.

Classification Dimensionality Reduction +1

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