how can compute the log10 of the image ? what is the effect of this operation ?

how can compute logarithm of base 10 for the image ? what is the effect of this operation ?

Answer 1

[Iain]

It suppresses small changes on large values and highlights changes of smaller values.

1 becomes 0, 10 becomes 1, 100 becomes 2...

 im = log10(image);