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possible for counting?

 

possible for counting?
alexax

1 Jul, 2009 - 01:19 AM
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Is it possible to count number of very small fishes? Let's say one second can count 500 fishes. How should i do using c++ with OpenCV?

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e_barroga

RE: Possible For Counting?

1 Jul, 2009 - 02:12 AM
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What do you mean by count?

I'm sure it is possible without a library such as OpenCV (whatever that is).
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computerfox

RE: Possible For Counting?

1 Jul, 2009 - 05:43 AM
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first off, what is fish? i assume it's a class that you created. then in that case, yes you care able to count with a loop and a variable, usually called count. hope that helps smile.gif
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NickDMax

RE: Possible For Counting?

1 Jul, 2009 - 06:40 AM
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It should be possible, especially if you can control the environment that the fish are in.

Basically the process is to take a picture of the aquarium (or whatever environment you have) without the fish. Then take pictures with the fish in the tank then compare the changes. libraries like OpenCV offer features to assist in edge detection which can possibly help. But depending upon how the fish are colored in contrast to the background this may not be necessary.

Just as with your eye the higher the density of fish the harder it will be to count them. If they group together you will probably need object recognition (edge detection), on the other hand if they are spread out then you probably only need simple comparison of images.
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alexax

RE: Possible For Counting?

2 Jul, 2009 - 07:31 PM
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Hi NickDMax,

you get what i wanted! Ok now i have a edge detection program working using openCV and win32..

You mentioned above that "taking pictures with the fish in the tank then compare the changes".. What you mean by that? How aam i suppose to compare the changes? By coding?
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e_barroga

RE: Possible For Counting?

2 Jul, 2009 - 09:35 PM
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If we can use programming to create games like Halo or Unreal or other games, I am sure it is possible to count small amount of fish.
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alexax

RE: Possible For Counting?

2 Jul, 2009 - 09:47 PM
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So do you know how to program it?
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