Object characteristics determination in matlab

Hi, I am trying to detect object (not totally circle) characteristics, e.g. shape, size, and how many in each size. Can anyone give me a hand on this if you happen to know the Apps or codes? Many many thanks.

Answer 1

[Image Analyst]

See my Image Segmentation Tutorial http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862&sort=downloads_desc. There are also color segmentation demos there also.