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3 March 2008 Probability density function estimation for video in the DCT domain
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Proceedings Volume 6812, Image Processing: Algorithms and Systems VI; 68120L (2008)
Event: Electronic Imaging, 2008, San Jose, California, United States
Regardless the final targeted application (compression, watermarking, texture analysis, indexation, ...), image/video modelling in the DCT domain is generally approached by tests of concordance with some well known pdfs (like Gaussian, generalised Gaussian, Laplace, Rayleigh ...). Instead of forcing the images/videos to stick to such theoretical models, our study aims at estimating the true pdf characterising their behaviour. In this respect, we considered three intensively used ways of applying DCT, namely on whole frames, on 4x4 blocks, and on 8x8 blocks. In each case, we first prove that a law modelling the corresponding coefficients exists. Then, we estimate this law by Gaussian mixtures and finally we identify the generality of such model with respect to the data on which it was computed and to the estimation method it relies on.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
O. Dumitru, M. Mitrea, F. Prêteux, and A. Pathak "Probability density function estimation for video in the DCT domain", Proc. SPIE 6812, Image Processing: Algorithms and Systems VI, 68120L (3 March 2008);

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