> I have a project where i want to detect and count bubbles in a test tube.
> I am using opencv; i used hough circle detecting algorithm. But its of no
> use for this purpose
> Any one know any kind of algorithm to count specific objects or any shape
> analyzing techniques?
> any kind of information or ideas are welcomed
> thanks in advance

Did you ask Gargoyle?
What did it say?

Some of these may be useful:

http://prola.aps.org/abstract/PR/v102/i6/p1653_1

Bubble counting using an inverse acoustic scattering method
http://www.umiacs.umd.edu/~ramani/pubs/bubcount.pdf

Ultrasonic bubble counting technique for neutron dose measurements in
bubble damage detectors
<http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVS-3XP7FXV-4&_user=10&_coverDate=08/31/1999&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1337607395&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=67ff328963afb88c18272baaeb2257d9>

This looks interesting. Method may be able to be adduced from photo or
web search.
Photosynthesis (bubble-counting-method) (with the Cobra3 Ba-sic-Unit)
http://www.phywe.com/461/pid/26802

Interesting. Abstract but gives good outline.
Acoustic bubble counting technique using sound speed extracted from
sound attenuation
  http://ieeexplore.ieee.org/Xplore/login.jsp?reload=true&url=http://ieeexplore.ieee.org/iel5/48/19839/00917945.pdf%3Farnumber%3D917945&authDecision=-203

Photoelectric
Bubble counter based on photoelectric technique for leakage detection
of cryogenic valves
http://www.springerlink.com/content/u343546588p65012/

   R

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