Ml. Suzen et V. Toprak, FILTERING OF SATELLITE IMAGES IN GEOLOGICAL LINEAMENT ANALYSES - AN APPLICATION TO A FAULT ZONE IN CENTRAL TURKEY, International journal of remote sensing, 19(6), 1998, pp. 1101-1114
Lineament extraction and analysis is one of the routines in mapping la
rge areas using remotely-sensed data, most of which is the satellite i
mages. In this study, we aimed to test different lineament extraction
techniques including single band, multiband enhancements and spatial d
omain filtering techniques. A fast algorithm has been developed for ti
me and cost limited surveys in an area with known dominant and/or any
selected orientation of lineaments. During the study for single band a
nalysis, histogram equalization and stretching, for multiband, Princip
al Components Analysis (PCA) and for spatial domain filtering Prewitt
and Sobel filters are utilized. Furthermore, we have developed a new a
lgorithm which consists of a combination of large smoothing filters an
d gradient filters, in order to get rid of the artificial lineaments w
hich are out of interest and to determine discontinuous and/or closely
spaced regional lineaments. The results are as follows; the number of
lineaments and their total lengths are 218 285.3 km using the single
band; 255 343.9 km in multiband enhancements, and 347 644.9 km in the
combination of spatial domain filtering including our algorithm. The 5
9.17 per cent increase in the number of lineaments and the 126.04 per
cent increase in the total lengths indicate that a combination of spat
ial domain filters is the most cost-time efficient algorithm in lineam
ent analyses.