It was stated in the preface to the ?rst edition of this book that image p- cessing by electronic means has been a very active ?eld for decades. This is certainly still true and the goal has been, and still is, to have a machine perform the same image functions which humans do quite easily. In reaching this goal we have learnt about the human mechanisms and how to apply this knowledgetoimageprocessingproblems. Althoughthereisstillalongwayto go, we have learnt a lot during the last ?ve or six years. This new information andsomeideasbaseduponithasbeenaddedtothesecondeditionofourbook The present...