Dry erase board lined with IR sensors to record pen strokes [video]
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Re: Dry erase board lined with IR sensors to record pen strokes [video]
#2[deleted]
Re: Dry erase board lined with IR sensors to record pen strokes [video]
#3Really impressive. Must be pretty sensitive IR sensors to not have false detections when the marker/eraser gets close to the board but doesn't touch it. Any info on the hardware and software stack?
Re: Dry erase board lined with IR sensors to record pen strokes [video]
#4Really impressive. Must be pretty sensitive IR sensors to not have false detections when the marker/eraser gets close to the board but doesn't touch it. Any info on the hardware and software stack?
Looks like it did actually have an FP+ on the eraser there if you compare the phone to what he actually erased onscreen.
I'll second the request for more info though!
Re: Dry erase board lined with IR sensors to record pen strokes [video]
#5Impressive. What platform did you build this on?
Re: Dry erase board lined with IR sensors to record pen strokes [video]
#6Fairly neat. Consider the listing status of the video. Right now it is discouraging people from sharing.
Re: Dry erase board lined with IR sensors to record pen strokes [video]
#7Looked like it was zoomed in on the written part. I wonder if it would gradually zoom out, as you write more, or if you could scroll around on the display to see the rest of the writing.
Re: Dry erase board lined with IR sensors to record pen strokes [video]
#8Really impressive. Must be pretty sensitive IR sensors to not have false detections when the marker/eraser gets close to the board but doesn't touch it. Any info on the hardware and software stack?
Thanks. If the pen is about 2mm off the surface, there is a false positive. Also haven't done palm rejection yet, so your palm needs to be off the board to write.
Re: Dry erase board lined with IR sensors to record pen strokes [video]
#9Is this working on a similar system to Optical touchscreen technology? Did you build the ir sensors into the edge of the glass or at the surface?
http://www.planar.com/media/111012/touch_technologies_white_...
Re: Dry erase board lined with IR sensors to record pen strokes [video]
#10Really impressive. Must be pretty sensitive IR sensors to not have false detections when the marker/eraser gets close to the board but doesn't touch it. Any info on the hardware and software stack?
Thanks. If the pen is about 2mm off the surface, there is a false positive. Also haven't done palm rejection yet, so your palm needs to be off the board to write.
I used an off the shelf IR touch frame bought from Aliexpress: http://www.aliexpress.com/wholesale?catId=0&initiative_id=AS... All touch inputs fed into Raspbery PI with a wifi dongle.