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Accuracy issues of identification possibilities and analyzing digital images of land surface are examined using a covariance method. Digital images received using remote access methods are treated by the computer programes developed in the Matlab 7 software package environment. The paper investigates the opportunity to automatically compare two digital images of fragments and determines the interdependence of comparable images. The interdependence of two images is verified according to the calculated values of the correlation coefficient. Considering a more absolute value of the correlation coefficient between compared digital images, dependency is higher and vice versa. Such method could be applied to long-term monitoring in order to control the temporal evolution of selected images.

geodesy and cartography

THE APPLICATION OF THE COVARIANCE METHOD ANALYSING THE DIGITAL IMAGES OF LAND SURFACE / ŽEMĖS DANGOS POKYČIŲ NUSTATYMAS ATLIEKANT FOTOGRAFINIŲ VAIZDŲ PALYGINIMĄ KOVARIACIJOS METODU / ИЗМЕНЕНИЯ ПОЧВЕННО-РАСТИТЕЛЬНОГО ПОКРОВА, ВЫЯВЛЕННЫЕ ПРИ СРАВНЕНИИ ЦИФРО ВЫХ ИЗОБРАЖЕНИЙ КОВАРИАЦИОННЫМ МЕТОДОМ