Glossary for Geospatial Science

contrast:� The difference between bright and dark values in the display or printout of a continuous tone (usually grayscale) image.� The stronger the contrast, the more difference between the brightest and darkest values.� Most images benefit from a process of contrast enhancement, which artificially increases the contrast.

TNTmips provides different methods of distributing intermediate display or print values.� The Linear contrast model assigns straight-line increments of intensity.� Many images look better when they are produced with the Normalized contrast model, which assigns intensity increments according to a normal distribution curve.