Detection of Motion-Incoherent Components in Video Streams

Motion coherency has recently been identified as a desirable property for watermarks embedded within video streams in order to withstand temporal frame averaging along the motion axis. Nevertheless, no tool has been proposed to easily evaluate the motion coherency of a given watermarking system. Tod...

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Bibliographic Details
Published in:IEEE transactions on information forensics and security 2009-03, Vol.4 (1), p.49-58
Main Authors: Pankajakshan, V., Doerr, G., Bora, P.K.
Format: Article
Language:English
Subjects:
Assessments
Coherence
Detectors
Embedded computing
Feature extraction
Frames
Incoherence
Motion coherency
Motion compensation
Motion detection
steganalysis
Streaming media
Streams
Temporal logic
Video compression
Video sequences
Video sharing
video watermarking
Watermarking
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Summary:Motion coherency has recently been identified as a desirable property for watermarks embedded within video streams in order to withstand temporal frame averaging along the motion axis. Nevertheless, no tool has been proposed to easily evaluate the motion coherency of a given watermarking system. Today, this assessment relies on a computationally expensive procedure, namely, (1) embed a watermark, (2) perform temporal frame averaging, and (3) check for the presence of the watermark. In this article, a novel oracle is designed to detect whether a video stream contains any motion-incoherent component or not. Since such incoherence can be introduced by nonmotion-coherent watermarking algorithms, this tool has proven to be most valuable to distinguish watermarked from nonwatermarked content. The oracle relies on some features extracted from error frames after motion compensation. Experimental results demonstrate the efficiency of the proposed method with uncompressed and compressed video streams.
ISSN:1556-6013
1556-6021
DOI:10.1109/TIFS.2008.2012199