Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
Mario Noyon <mnoyon> wrote: > I want to mask the background of an image to have only the interesting signal. > The procedure of ERODE doesn't seem to work. > > Does someone have an idea? > I'm not clear on what you're trying to do. If you have an image and your goal is to increase the Signal-to-Noise ratio, then it depends to large extent on how the image was acquired. I might be able to help if you could provide a little more information Arno Granados Positive Systems Inc "Leaders in Digital Aerial Photography" granados@possys.com
Mario Noyon <mnoyon> writes: > > I want to mask the background of an image to have only the interesting > signal. > The procedure of ERODE doesn't seem to work. First of all you have to come up with some idea how the "background" can be distinguished from what you would regard as signal. Only after you have characterized that you can proceed to choose from the variety of filters/ imaging processing techniques the most suitable ones. I would recommend you have a look at some basic image processing textbook to get an idea of what is possible and what isn't. A lot of different filters are already availabe in plain IDL (see List_of_Routines_by_Application->Array_and_ Image_Processing_Routines) or can easily be implemented using IDL. Hope this helps, Christian ------------------------------------------------------------ -------- Christian Soeller mailto: csoelle@sghms.ac.uk St. Georges Hospital Medical School Dept. of Pharmacology Cranmer Terrace London SW17 0RE
Thanks for answering me, but I've already found the solution. -- NOYON Mario Computer Science engineer University of Bordeaux 2 mnoyon@jmc-luni.u-bordeaux2.fr