Title :
Modeling, Clustering, and Segmenting Video with Mixtures of Dynamic Textures
Author :
Chan, Antoni B. ; Vasconcelos, Nuno
Author_Institution :
Univ. of California at San Diego, La Jolla
fDate :
5/1/2008 12:00:00 AM
Abstract :
A dynamic texture is a spatio-temporal generative model for video, which represents video sequences as observations from a linear dynamical system. This work studies the mixture of dynamic textures, a statistical model for an ensemble of video sequences that is sampled from a finite collection of visual processes, each of which is a dynamic texture. An expectation-maximization (EM) algorithm is derived for learning the parameters of the model, and the model is related to previous works in linear systems, machine learning, time- series clustering, control theory, and computer vision. Through experimentation, it is shown that the mixture of dynamic textures is a suitable representation for both the appearance and dynamics of a variety of visual processes that have traditionally been challenging for computer vision (for example, fire, steam, water, vehicle and pedestrian traffic, and so forth). When compared with state-of-the-art methods in motion segmentation, including both temporal texture methods and traditional representations (for example, optical flow or other localized motion representations), the mixture of dynamic textures achieves superior performance in the problems of clustering and segmenting video of such processes.
Keywords :
expectation-maximisation algorithm; image segmentation; image sequences; image texture; video signal processing; computer vision; dynamic textures; expectation-maximization algorithm; linear dynamical system; machine learning; motion segmentation; spatio-temporal generative model; statistical model; temporal texture methods; time-series clustering; video sequences; visual processes; Dynamic texture; Kalman filter; expectation-maximization; linear dynamical systems; mixture models; motion segmentation; probabilistic models; temporal textures; time-series clustering; video clustering; video modeling; Algorithms; Artificial Intelligence; Cluster Analysis; Computer Simulation; Image Enhancement; Image Interpretation, Computer-Assisted; Information Storage and Retrieval; Likelihood Functions; Models, Statistical; Pattern Recognition, Automated; Reproducibility of Results; Sensitivity and Specificity; Video Recording;
Journal_Title :
Pattern Analysis and Machine Intelligence, IEEE Transactions on
DOI :
10.1109/TPAMI.2007.70738