Introduction
Image analysis by photo-interpretation is often facilitated when the radiometric nature of
the image is enhanced to improve its visual impact. Specific differences in vegetation and
soil types, for example, may be brought out by increasing the contrast of an image.
Similarly the differences in brightness value can be highlighted either by contrast
modification or by assigning quite different colors to those levels (Richards, 1989). This
study presents a variety of image enhancement procedures often used with remote sensing image data.
Objectives of study
i) To explore the basic capabilities of PCI Geomatica software,
ii)To introduce colour composites, histograms, and scatterplots as tools for exploring image data stored in database channels, and
iii)To learn about contrast enhancements, and the impact of the different enhancement types on raw imagery.
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