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What is Capture & Access?


Nowadays, people are increasingly surrounded by a wide variety of computational devices at their homes and work, such as desktop and laptop computers, media centers, connected televisions, smartphones, tablets, and a myriad of sensors; all of which are capable of registering and delivering information on user demand. Generally speaking, a Capture and Access (C&A) system aims to capture digital media relative to a particular live social event from available devices, and afterwards to deliver this information as some sort of document reflecting what happened in that event for posterior access.

What is the CAS (Capture & Access System) Project?


The CAS Project is a multi-purpose, extensible and distributed C&A infrastructure that supports digital media recording and the automatic generation of multimedia documents for later review. Our goal is to provide an all-purpose C&A testbed to allow researchers rapidly evaluate different forms of dynamics and interactions in collaborative live event scenarios, where participants may be using mobile devices and the event venue may also have stationary devices. Devices are clustered into groups (in a space abstraction) reflecting geolocation, which also can be used to enable interaction between remote distributed venues.

What can it record?


Our infrastructure was designed to be flexible and generic, thus it can be applied to very different kind of scenarios, for instance:

Workplace scenarios: Professional meetings and teleconference events, which are likely to be content rich and worth a later review. Structured and unstructured (impromptu) meetings are supported. They can have a known and agreed agenda, where the participants and the content to be discussed are specified in advance. Or they can be more informal meetings without any previously known structure.

Educational scenarios: Classes, seminars, presentations, operating rooms with spectators, and general presentations. Another slightly different scenario supported in this category is scientific experiments. CAS can enable researchers to advance in their own disciplines by annotating and reviewing their data. These scenarios could be collaborative or centered on one user without interaction with other participants.

Personal scenarios: CAS can be used in a experimental continual capture scheme where all the daily user actions are recorded for later access. A user could capture all his experiences, such as watching movies, going to museums, or sports events, to later recall these experiences. Health care is another particular case supported, doctors may use patient-recorded data to assist with diagnosis.

Security scenarios: Events ranging from simple indoor surveillance, to massive outdoor surveillance events like sports games, music concerts, or large-scale city surveillance operations in command and control rooms. In order to support an event with hundreds (or perhaps thousands) of such correlated media, our C&A system was designed to be scalable at its capture and access stages.
©2012 Tecgraf, Pontifícia Universidade Católica do Rio de Janeiro. Direitos reservados.
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