Information Technology Reference
In-Depth Information
multimedia objects with no textual description in multimedia applications.
The authors propose an extended RBAC model as used by Ferraiolo [32] with
a user model (describing both the user-related information and the applica-
tion services), a role model (extending the RBAC model so that it can describe
roles on a user-related basis), a rule model (adding object features), a policy
model (to consider all of the requirements of current methods), and a link
model (allowing the representation of various types of links) to address role
specification based on content features such as shape, color, and relation
rather than on textual descriptions.
The most important issue in managing human life digital memories is
that of keeping personal digital information safe and private without the
owner having difficulty accessing or preserving it. It will become increas-
ingly important to develop techniques for storing large amounts of complex
data over decades or indeed centuries, in a manner that is robust to changes
in hardware, operating systems, and indexing strategies. The computer and
programs that operate on the data will change frequently over a human life-
time, but the data must outlast the systems that analyze it. Questions will be
asked of the data that were not predicted when the data was indexed, so the
indexing strategies must change over time.
12.3 Proposed Architecture
12.3.1 Data Capture
For our architecture we use active capture methods to capture our lifetime
experiences, especially personal serendipitous moments. Active capture
means people capturing photos or video on their own initiative. Active cap-
ture is very effective for allowing someone to recall an event back in the
future. It can be more personally meaningful compared to passive images
captured using an automatic sensor camera [33].
It is not unusual for more recent models of digital cameras to include fea-
tures that can considerably improve the capture of digital memories, such as
face and smile detection and antiblur modes. They can increasingly be paired
with GPS devices to establish photo locations. These can be used to record
where shots were taken, allowing them to be displayed where they belong
on a world map based on latitude and longitude. For our prototype we store
images at 3264 × 2448 resolution; a 1.0 gigabyte memory stick can store up
to approximately 341 such photos in raw form. We use a small, light camera
making it convenient to carry around the neck and easy to operate for the
capture of photographs and video. A serendipitous moment is not a well-
planned situation and it can happen at any time and any place. Therefore
it is important that the camera can be easily left in standby mode, to allow
pictures or video of serendipitous moments to be shot at any time or place.
