Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications Volume 1: GRAPP, HUCAPP and IVAPP Acronym: GRAPP 2025 Event held on: February 26-28, 2025, in Porto, Portugal Editors: Thomas Bashford-Rogers 1 , Daniel Meneveaux 2 , Mehdi Ammi 3 , Mounia Ziat 4 , Stefan Jänicke 5 , Helen Purchase 6 , Petia Radeva 7 , Antonino Furnari 8 , Kadi Bouatouch 9 and A. Augusto Sousa 10 Affiliations: 1 University of Warwick, United Kingdom , 2 University of Poitiers, XLIM, France , 3 University of Paris 8, France , 4 Bentley University, United States , 5 Department of Mathematics and Computer Science, University of Southern Denmark, Denmark , 6 Monash University , 7 Universitat de Barcelona, Spain , 8 University of Catania, Italy , 9 IRISA, University of Rennes 1, France , 10 FEUP/INESC TEC, Portugal Vol. 1 - 978-989-758-728-3 Vol. 2 - 978-989-758-728-3 Vol. 3 - 978-989-758-728-3