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Home » Publication » Video test & measurement publications

Video test & measurement publications

Video test & measurement publications December 1, 2013 Conference Paper

Measuring Flow Complexity in Videos

SRI International

In this paper a notion of flow complexity that measures the amount of interaction among objects is introduced and an approach to compute it directly from a video sequence is proposed. The approach employs particle trajectories as the input representation of motion and maps it into a `braid’ based representation. The mapping is based on the observation that 2D trajectories of particles take the form of a braid in space-time due to the intermingling among particles over time. As a result of this mapping, the problem of estimating the flow complexity from particle trajectories becomes the problem of estimating braid complexity, which in turn can be computed by measuring the topological entropy of a braid. For this purpose recently developed mathematical tools from braid theory are employed which allow rapid computation of topological entropy of braids. The approach is evaluated on a dataset consisting of open source videos depicting variations in terms of types of moving objects, scene layout, camera view angle, motion patterns, and object densities. The results show that the proposed approach is able to quantify the complexity of the flow, and at the same time provides useful insights about the sources of the complexity.

Video test & measurement publications April 1, 2011 Conference Paper

Accurate Content-Based Video Copy Detection with Efficient Feature Indexing

SRI International

Video test & measurement publications August 1, 2009

Programmable Deblocking Filter Architecture for a VC-1 Video Decoder

SRI International

This letter describes a programmable VC-1 deblocking filter architecture with capabilities to support different standards.

Video test & measurement publications September 1, 2008

A Multi-Standard Micro-Programmable Deblocking Filter Architecture and Its Application to VC-1 Video Decoder

SRI International

This paper describes a programmable VC-1 de-blocking filter architecture with capabilities to support different standards. The architecture has been modeled, simulated and implemented in RTL.

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