Another cool example of this effect is with helicopter blades
https://www.youtube.com/watch?v=R-IVw8OKjvQ
Doris
if the sampling frequency is just the same as the frequency of wagon, will it be seen as a still wagon wheel?
motoole2
That's a good question! Let's try to work this out. At any particular pixel (x,y) in this video sequence, we can approximately model the temporal function f(t) as a square wave that has some frequency w. What might happen when the sampling frequency matches the frequency of the square wave f(t)? What about sampling the same function at a frequency equal to w/k, for any integer k? Hint: This is related to that helicopter video.
The helicopter is really neat btw. Here's another fun video showing off aliasing effects for water droplets under stroboscopic illumination!
Newton's color disc :'(
Another cool example of this effect is with helicopter blades https://www.youtube.com/watch?v=R-IVw8OKjvQ
if the sampling frequency is just the same as the frequency of wagon, will it be seen as a still wagon wheel?
That's a good question! Let's try to work this out. At any particular pixel
(x,y)in this video sequence, we can approximately model the temporal functionf(t)as a square wave that has some frequencyw. What might happen when the sampling frequency matches the frequency of the square wavef(t)? What about sampling the same function at a frequency equal tow/k, for any integerk? Hint: This is related to that helicopter video.The helicopter is really neat btw. Here's another fun video showing off aliasing effects for water droplets under stroboscopic illumination!