Fig. 4

Directional filtering applied to the PCA image at two orientations: (a) 45° (NE–SW), and (b) 135° (NW–SE), enhancing the visibility of structural lineaments trending in those directions.

Directional filtering applied to the PCA image at two orientations: (a) 45° (NE–SW), and (b) 135° (NW–SE), enhancing the visibility of structural lineaments trending in those directions.