question about ultimate points

Posted by Aryeh Weiss on May 19, 2011; 10:53am
URL: http://imagej.273.s1.nabble.com/question-about-ultimate-points-tp3684533.html

I have an image in which binary->ultimate points (also biary->watershed)
causes some objects to disappear. I have a small example but it cannot
be posted.   I think you can download it from
http://www.megaupload.com/?d=8SCDE952

If that does not work, then I will be happy to send anyone interested
the example (it is a binary image, 4KB zipped on my disk).

It may be related to the fact that all pixels in the disappearing object
are neighbors to a boundary. However, note that a point object is left
intact.

Is this a bug, or something that I dont know about the definition of
ultimate points? i expected it to leave something, but maybe certain
classes of objects have no well defined ultimate point. If so, I would
want to be able to find such objects so that I can deal with them
separately.

--aryeh
--
Aryeh Weiss
School of Engineering
Bar Ilan University
Ramat Gan 52900 Israel

Ph:  972-3-5317638
FAX: [phone]