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Re: Questionable Results from Ultrasonic
To sort of tie a bunch of things together - the ranges and clutter threshold at which ultrasonic works well does not have a lot of overlap with FRC conditions. IR or visual rangefinders usually work better than ultrasonic at shorter ranges (up to about 2 meters/6 feet), and vision processing is better than ultrasonic at longer ranges, especially if there is retroreflective tape on the target. Use green light; FRC fields usually abound in red and blue LEDs (2016 is no exception). Use the color info from your camera: at simplest, just use the blue channel; even better may be a calculation which considers red and blue light as being of a negative value.
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Last edited by GeeTwo : 01-03-2016 at 23:10.
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