Scrapped from : http://tech.groups.yahoo.com/group/OpenCV/message/71525
Actually there are 3 blob libraries with almost the same name, and they are all
decent but not perfect, so you could try them all:
3) “Bloblib” (also referred to as “Blob Analysis Package”):
Go to http://tech.groups.yahoo.com/group/OpenCV/files/ and look for
“BlobAnalysis.zip” by Dave Grossman.
Some comments about it here:
And there is also the OpenCV function “cvContour()”.