Quote:
Originally Posted by windtakers
I've read many different post on measuring the distance of you robot to the hoop and different pdfs like this, but their are a few things I don't understand.
1) How do you account for the rectangle distortion when you are not directly in front of it and at a downward angle.
2)how accurate can I get the distance measurement
3)what is the most accurate way to measure distance with a camera or multiple cameras
4)what would the easiest way to measure distance with a camera. |
I'm using Java, but I should be able to help a bit.
1) You can account for the downward angle, since you know how high the target is. The perspective transformation is much harder, but I am having pretty good results by ignoring it for the most part.
2) I've done very limited testing, but I had a quarter inch of error from 5 feet away. Will get worse when it is further away, but I don't know how much worse yet.
3) I am using the pixel height of the bounding box around the target, and lots of trigonometry to figure it out. If you are willing to use multiple cameras, you can figure more out about the perspective tranform, and thus get a more accurate reading
4) Most likely the way I am doing it, but I would like to stand corrected
