Title :
Behaviour of a generalised covariance model in picture coding
Author :
Kim, N.C. ; Kim, J.K.
Author_Institution :
Korea Advanced Institute of Science & Technology, Department of Electrical Engineering, Seoul, Korea
Abstract :
We propose a generalised exponential model for the covariance function of real image that is more realistic than the two conventional models, i.e. separable and isotropic models. The theoretical coding performance based on this model is shown to agree well with that based on the real covariance function in the discrete cosine transform (DCT) coding.
Keywords :
encoding; picture processing; transforms; discrete cosine transform; generalised covariance model; isotropic models; picture coding; real image; separable models;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830179
