This book contains the proceedings of the 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2020) which was organized and sponsored by the Institute for Systems and Technologies of Information, Control and Communication (INSTICC), in cooperation with the ACM Special Interest Group on Computer Human Interaction (SIGCHI), the French Association for Computer Graphics (AFIG), the EUROGRAPHICS Portuguese Chapter, the European Association for Computer Graphics (EUROGRAPHICS) and the Society for Imaging Science and Technology (IS&T).

The proceedings here published demonstrate new and innovative solutions and highlight technical problems in each field that are challenging and worthy of being disseminated to the interested research audiences.

VISIGRAPP 2020 was organized to promote a discussion forum about the conference’s research topics between researchers, developers, manufacturers and end-users, and to establish guidelines in the development of more advanced solutions.

We received a high number of paper submissions for this edition of VISIGRAPP, 455 in total, with contributions from 58 countries. This attests to the success and global dimension of VISIGRAPP. To evaluate each submission, we used a hierarchical process of double-blind evaluation where each paper was reviewed by two to six experts from the International Program Committee (IPC).

The IPC selected for oral presentation and for publication as full papers 16 papers from GRAPP, 8 from HUCAPP, 9 papers from IVAPP, and 46 papers from VISAPP, which led to a result for the full-paper acceptance ratio of 17% and a high-quality program. Apart from the above full papers, the conference program also features 118 short papers and 109 poster presentations. We hope that these conference proceedings, which are submitted for indexation by Thomson Reuters Conference Proceedings Citation Index, SCOPUS, DBLP, Semantic Scholar, Google Scholar, EI and Microsoft Academic, will help the Computer Vision, Imaging, Visualization, Computer Graphics and Human-Computer Interaction communities to find interesting research work. Moreover, we are proud to inform that the program also includes four plenary keynote lectures, given by internationally distinguished researchers, namely Matthias Niessner (Technical University of Munich, Germany), Anthony Steed (University College London, United Kingdom), Alan Chalmers (University of Warwick, United Kingdom) and Helen Purchase (University of Glasgow, United Kingdom), thus contributing to increase the overall quality of the conference and to provide a deeper understanding of the conference’s interest fields.

Furthermore, a short list of the presented papers will be selected to be extended into a forthcoming book of VISIGRAPP Selected Papers to be published by Springer during 2020 in the CCIS series. Moreover, a short list of presented papers will be selected for publication of extended and revised versions in a special issue of the open access Information Journal (IVAPP), a special issue of the Pattern Recognition and Artificial Intelligence Journal (VISAPP) and a special issue of The Visual Computer journal (GRAPP and HUCAPP). All papers presented at this conference will be available at the SCITEPRESS Digital Library. Three awards are delivered at the closing session, to recognize the best conference paper, the best student paper and the best poster for each of the four conferences. There is also an award for best industrial paper to be delivered at the closing session for HUCAPP and VISAPP.

We would like to express our thanks, first of all, to the authors of the technical papers, whose work and dedication made it possible to put together a program that we believe to be very exciting and of high technical quality. Next, we would like to thank the Area Chairs, all the members of the program committee and auxiliary reviewers, who helped us with their expertise and time. We would also like to thank the invited speakers for their invaluable contribution and for sharing their vision in their talks. Special thanks should be addressed to the INSTICC Steering Committee whose invaluable work made this event possible.

We wish you all an exciting conference and an unforgettable stay in Valletta, Malta. We hope to meet you again for the next edition of VISIGRAPP, details of which are available at http://www. visigrapp.org.