Investigation of the automatic construction of a digital model of relief by the VLL-method based on aerial photography

Lviv Polytechnic National University
Lviv Polytechnic National University
Ivan Franko National University of Lviv

The article reviews ways to select correct parameter set for automatic construction of regular DEM using the VLL (Vertical Line Locus) based on the correlation algorithm of matching stereo pair point identification. The parameters impacting a number of successfully correlated points and accuracy of DEM construction are considered: a threshold value of correlation coefficient, a search window size, a grid spacing and relief slope angles. The aerial image stereo pairs for rural areas with different landscape types were studied using software developed by authors. The empirical results are included in the article.

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