With preliminary processing aims at modifying the grey level of the pixels in order to obtain an adequate digital image for further processing. The characteristics of the processed image depend on the specific of the application and the destination. In order to improve the photo interpretation process — the accurate determination of the landmarks and cartographic details — a set of methods are applied to reveal the phenomens and objects of interest. The most frequent methods for improving image quality are: contrast improving, image filters, false coloured images, compound colour images and the analysis of the basic components.

Remote sensing; processing; spatial filter; classification

Presentation: oral