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#1
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Backboard Pixel Distance Question
The 2012 Vision whitepaper explains on page 9 how to compute the distance from the target. We understand everything but the 56 pixel wide target rectangle (This is the actual quote):
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Some clarification would be great. Last edited by Glen : 27-01-2012 at 21:40. Reason: added source page number and more explanation |
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#2
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Re: Backboard Pixel Distance Question
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Think about it from your standpoint as a human: the farther you are from something, the smaller it looks, right? With the camera and the math in the paper, you can translate the "how small it looks" directly into "how far away" it is. The "56" number in the paper is just an example. They said "let's say the camera shows the width of the rectangle is 56 pixles, then that means ..." |
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#3
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Re: Backboard Pixel Distance Question
We understand that that was used as an example, but how do we find that number? You have to have a way to find the exact number (you can't use examples for the real thing). How does the camera "show" the width of the rectangle is 56 pixels? If I step 10 feet farther back, obviously the target rectangle will NOT measure 56 pixels anymore. How do find out what the NEW width is?
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#4
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Re: Backboard Pixel Distance Question
The width was measured from the particle that is believed to be a particle. It was actually the width of the bounding box of the particle. Those numbers come from the particle analysis report function.
Greg McKaskle |
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