Dissertação para obtenção do Grau de Doutor em
InformáticaVideo can be considered one of the most complete and complex media and its manipulating
is still a difficult and tedious task. This research applies pen-based technology to
video manipulation, with the goal to improve this interaction. Even though the human
familiarity with pen-based devices, how they can be used on video interaction, in order
to improve it, making it more natural and at the same time fostering the user’s creativity
is an open question.
Two types of interaction with video were considered in this work: video annotation
and video editing. Each interaction type allows the study of one of the interaction modes
of using pen-based technology: indirectly, through digital ink, or directly, trough pen
gestures or pressure. This research contributes with two approaches for pen-based video
interaction: pen-based video annotations and video as ink.
The first uses pen-based annotations combined with motion tracking algorithms, in
order to augment video content with sketches or handwritten notes. It aims to study how
pen-based technology can be used to annotate a moving objects and how to maintain the
association between a pen-based annotations and the annotated moving object
The second concept replaces digital ink by video content, studding how pen gestures
and pressure can be used on video editing and what kind of changes are needed in the
interface, in order to provide a more familiar and creative interaction in this usage context.This work was partially funded by the UTAustin-Portugal, Digital Media, Program
(Ph.D. grant: SFRH/BD/42662/2007 - FCT/MCTES); by the HP Technology for Teaching
Grant Initiative 2006; by the project "TKB - A Transmedia Knowledge Base for contemporary
dance" (PTDC/EAT/AVP/098220/2008 funded by FCT/MCTES); and by CITI/DI/FCT/UNL (PEst-OE/EEI/UI0527/2011
