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Mobile multimedia event capturing and visualization

Panteli Amalia

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Summary

The fast and immense progress of the information technology, has made the multimedia a necessary aspect of everyone everyday life.Multimedia finds its application in various areas including, but not limited to,advertisements, art, education, entertainment, engineering, medicine, mathematics, business, scientific research and spatial temporal applications.Capturing Multimedia Events such as economic events, accident reports, building damage reports, etc., are expensive functionalities due to the number and training of the people required, as well as the time involved in the capturing and post-processing of multimedia.We present a model and a mobile system for multimedia event capturing by a one-mancrew. The system supports the real time capturing of complex multimedia events of different types, the recording of the capturing process and the metadata associated with the events, and the learning and preparation of the one-man-crew that will do the multimedia event capturing.Today all the multimedia types are recorded in a digital format. With each event metadata values of different types will have to be captured and associated with the events. The oneman-crew will also be responsible for capturing and recording the metadata that are associated with the event. In some cases the beginning and the end of the event to be recorded is not known in advance. In this case the one-man-crew will have to demarcatewithin a longer capturing sequence the beginning and the end of the event, and associate the relevant metadata values with it in order to be able to do fast post-processing (manuallyor automatically). Thus the multimedia capturing environment will have to be controlled and synchronized by a mobile computer (laptop or other) which will also provide functionality for demarcating the beginning and the end of events and associate the appropriate metadatavalues with each event.The first objective of this thesis is to facilitate the one-man-crew to do a complete and systematic capturing of the multimedia events of different types that compose a bigger event in real time. A second objective is to allow fast browsing and extraction of all the multimedia event information either in real time or at post-processing. A third objective is to allow the one-man-crew to be prepared through learning and reviewing for a good quality multimedia event capturing by means of event type specific learning instructions.Multimedia events in our model belong to complex event types that may be composed of simpler multimedia event types. The metadata captured for each event depend on its type.Events are captured by multimedia shots which belong to shot types. Events and multimedia shots may be associated with maps and/or diagrams. Shots are described by the position (captured by a GPS device or otherwise), direction (compass) and camera movement of the shot placed on a diagram of a scene that describes the event, as well as with other parameters. The description of shot types can be used for learning and preparation of theone-man-crew for multimedia capturing of events of a particular type.We describe the multimedia event capturing model, a prototype system implemented that supports the functionality of the model and two example applications that were materialized to demonstrate the functionality of the system.

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