Virginio Cantoni received the Laurea (cum laude) in Electronic Engineering in 1972 from Pavia University, Italy. He was a researcher of the Italian National Research Council from 1975 to 1983, and is presently a Full Professor of Computer Programming at Pavia University. From 1989 to 1995 Cantoni was Director of the Deparment of Computer Engineering, and from 1985 to 1990, he was the President of the Italian Group of the International Association for Pattern Recognition. He has been a Visiting Professor at Rutgers University, and has been Invited Professor at the Paris XI University. Levialdi is a Fellow of the IAPR and a senior member of IEEE. Dr Stefano Levialdi, IEEE Life Fellow, has published 300 papers on image processing, image communication and, in these last years, his research has focused on Human/Computer Interaction (visual languages and usability). He is Full Professor of Computer Science at Sapienza, Rome University since 1981. He won the Chair of Excelence at Carlos III University in Madrid. He has organized, chaired and contributed to over 50 International meetings. He is the Director of LUA (Laboratory of Usability and Accessibility at Sapienza). He is now retired, but works for the Elsevier Journal (JVLC) and reviews national research projects. His email is: stefano.levialdi@gmail.com

• PART I: Visual mechanisms Vision mechanismsThe image contents PART II: Visual cues Cues after artists (Lighting, Perspective, Relations) and tracksImage data tracksImage organization tracksMulti image tracks PART III: Visual contexts pp: 50 Contexts after artists (Retrieval, Recognition and Research) and tracksImmediate context Structure bound context Interpretation bound context PART IV: Visual channels Channels after artists (Vision, Perception, Action)Visual data structuresPerceptual structuresVisual communication PART V: A vision about future developments