2015-07-10 11:00:21 » android, controls, LEGO, MINDSTORMS, odd, OptiTrack, robotics, Software, vision processing
This is a small showcase project I did for 4-H. It’s a high-speed line tracker using a vision system.
I’m basically starting a frame by taking a sample of the last line of pixels, iterating through it, and trying to find a point where there’s a massive change in color value. When I find a positive and a negative one that’s close to the center, I average the two values to find the X location, and subtract them to find a line width (which I don’t use… yet). I then recursively call the function (for a limited number of times), passing in the same parameters. Once a single point is found, readings improve; I prioritize readings that are closer to the last point if their derivative/color change is still fairly high.
This method seems rather robust; I’ll see how it performs on a concrete floor with tape; hopefully it shouldn’t be a noisy space and my readings will fare well!