3 ms·
Nice. If you add some camera to the leds, using Aruco markers you can easily get the camera pose and adjust the led colors accordingly to draw a predefined imag
by GistNoesis 7y ago
Nice. If you add some camera to the leds, using Aruco markers you can easily get the camera pose and adjust the led colors accordingly to draw a predefined image without needing a steady hand.
You probably can turn this into a phone light brush app if you use front camera and screen as a led (the torch usually don't change color), but it still has some challenges with respect to latency (in dark environment cheap camera get slow) and user-friendliness specially if it needs calibration.
- StavrosK 7y agoHmm, wouldn't that add unacceptable latency? I feel like it would be at least 50ms.
- GistNoesis 7y agoAs I mentioned latency is indeed an issue, but I don't think it matter that much. Your pixel will be offset by the movement during this 50ms (probably more) which will be a typically a few centimeters, so edges will get a little blurry but I'm not a light painter expert. If it is really a problem, assume pose velocity from the previous frame positions and correct for latency and turn off the screen if acceleration sensor is greater than a value.
- StavrosK 7y agoThat's true, if you have a phone you can use the sensors on it to do dead reckoning in the interim. I'm not a mocap expert, but this seems very doable! It would be a great idea.