Home > Learning > Tutorials

Fundamentals of Remote Sensing

4.7 Whiz Quiz

An 'enhancement' of an image is done exclusively for visually appreciating and analyzing its contents. An enhancement would not add anything useful, as far as the classification algorithm is concerned. Another way of looking at this is: if two pixels have brightness values just one digital unit different, then it would be very difficult to notice this subtle difference by eye. But for the computer, the difference is just as 'obvious' as if it was 100 times greater.

An enhanced version of the image may help in selecting 'training' sites (by eye), but you would still perform the classification on the unenhanced version.

Back to the question...