Échantillonnage des images de télévision: analyse dans le domaine spatio-temporel et dans le domaine de Fourier

The spatio-temporal sampling of television pictures is considered. The authors first introduce the notation (spatio-temporal domain, video domain, Fourier domains), the notion of sampling pattern and the spatio-temporal sampling theorem. The Fourier transforms of the selected sampling patterns are then calculated. In the spatio-temporal domain and in the Fourier domain, they conduct the objective analysis of the sampling degradations for various picture configurations (spatio-temporal sine-wave patterns and edges). They then go into the problem of optimizing the sampling and conclude by mentioning spatio-temporal filtering and colour sampling aspects.