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Unread 20-01-2013, 03:07
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Azrathud Azrathud is offline
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AKA: Bryce Guinta
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Join Date: Jan 2010
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Re: Example of Vision Processing Avaliable Upon Request

Quote:
Originally Posted by jacob9706 View Post
...
Thanks pointing me toward OpenCV. I'll probably be doing onboard processing this year with a Raspberry Pi.

I have a few questions regarding your tutorial.
1. Why did you use Gaussian Blur on the image?

2. Could you explain what the findContours, arcLength( how do the arguments RETR_TREE and CHAIN_APPROX_SIMPLE modify the function?) , contourArea do exactly(except what's obvious), and how they relate to finding a correct rectangle?

3. Why do you mulitply the contour_length by 0.02?

4. How did you find the number 1000 to check against the contourArea?

I'm sure I could answer question #2 with some searching, but if you chould answer the others, that would be awesome.

Last edited by Azrathud : 20-01-2013 at 05:48.
 


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