KEYWORDS: Video, Cameras, RGB color model, Data modeling, Video surveillance, Sensors, Remote sensing, Instrument modeling, Local area networks, Performance modeling
New applications like remote surveillance and online environmental or traffic monitoring are making it increasingly
important to provide flexible and protected access to remote video sensor devices. Current systems use application-level
codes like web-based solutions to provide such access. This requires adherence to user-level APIs provided by such
services, access to remote video information through given application-specific service and server topologies, and that
the data being captured and distributed is manipulated by third party service codes. CameraCast is a simple, easily used
system-level solution to remote video access. It provides a logical device API so that an application can identically
operate on local vs. remote video sensor devices, using its own service and server topologies. In addition, the
application can take advantage of API enhancements to protect remote video information, using a capability-based
model for differential data protection that offers fine grain control over the information made available to specific codes
or machines, thereby limiting their ability to violate privacy or security constraints. Experimental evaluations of
CameraCast show that the performance of accessing remote video information approximates that of accesses to local
devices, given sufficient networking resources. High performance is also attained when protection restrictions are
enforced, due to an efficient kernel-level realization of differential data protection.
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