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Tracking for distance
Panayiotis Mousarris from United Kingdom [20 posts] |
16 year
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I am trying to track red objects in front of the camera that are square and have dimensions of 15cmx15cm and height also 15cm. I need to know the distance that an object is in front of the camera. By observing the box size variable I can see that I can rely only on the values of variable box size, when the object is between a range of 20cm - 50cm ahead of camera.
I would like to know if there's any way I can improve the range of which I can rely on the box values and try to relate them to an estimated distance.
Thank you
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Anonymous |
16 year
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I'd probably try using the object's size (i.e. number of pixels) rather than the bounding box size which will change drastically based on a single pixel. The objects size will change slowly as the size changes and give you a more stable estimate of the distance.
You'll have to determine your own size to distance formula as it will depend on some of your camera's characteristics and the objects color/lighting stability. Start by literally measuring the actual distance and the sampled pixel size of the object. Using a couple readings you should be able to create a reasonable approximation formula.
STeven.
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Panayiotis Mousarris from United Kingdom [20 posts] |
16 year
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I can't figure out which variable I am supposed to be looking at in order to check the object size.
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Anonymous |
16 year
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This was already mentioned on another post but just for completeness ... the variable should be the AREA variable created by the Geometric_Statistics module.
STeven.
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