Sitis 2017 foreword

Four main tracks SIVT (Signal & Image and Vision Technology), I-WeCA (Intelligent Web Computing and Application), MIRA (Multimedia Information Retrieval and Application) and LHNA (Heterogeneous Large Networks and their Applications) are included in the 13th International Conference On Signal-Image Technology & Internet-Based Systems SITIS'15. I-WeCA focuses on issues ranging from information modeling and retrieval techniques to novel concepts, architectures and methodologies for interconnecting information systems. SIVT is aimed at recent developments in digital signal processing, evolutions in audiovisual signal processing, analysis, coding and authentication, and retrieval techniques. MIRA is focused on emerging modeling, representation and retrieval techniques that take into account the amount, type and diversity of multimedia information accessible in distributed computing environment. The focus of LHNA is on emerging and novel concepts, architectures and methodologies for social networks analysis, tools and applications, including issues related to complex graphs, semantics, big data, and security.