Can we use capacitor to store the charge and read at once?
Milotrince
Using concepts of aliasing and frequency you can actually make illusions on purpose, like showing a plane whose propeller appears to be still but somehow still flying!
Boomaa23
@tom5079 capacitors in the ideal case would be able to charge and discharge (i.e. read) instantaneously, however in the real world their discharge rate is limited by some parasitic (unwanted) resistance between the capacitor and whatever the load is. Thus, with such a small distance between sensors the differences in parasitic resistance between the sensors will be high and using a larger capacitor would only slow the charge time.
Hamme122
I found a good demo on the wiki that explains this.
https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Rolling_shutter_effect_animation.gif/330px-Rolling_shutter_effect_animation.gif
snowshoes7
It's interesting to get more of a sense as to why this happens. Personally I first noticed this problem when looking at videos of propeller aircraft--it's a very noticeable effect that seems very unusual. I do wonder if this kind of issue is resolved with special filtering, since simply upping the frame rate a lot isn't always practical...
Alescontrela
This reminds me of our discussion on sampling and antialiasing. It seems we're just not sampling images at a high enough frequency to properly capture the plane's propellor spinning.
Can we use capacitor to store the charge and read at once?
Using concepts of aliasing and frequency you can actually make illusions on purpose, like showing a plane whose propeller appears to be still but somehow still flying!
@tom5079 capacitors in the ideal case would be able to charge and discharge (i.e. read) instantaneously, however in the real world their discharge rate is limited by some parasitic (unwanted) resistance between the capacitor and whatever the load is. Thus, with such a small distance between sensors the differences in parasitic resistance between the sensors will be high and using a larger capacitor would only slow the charge time.
I found a good demo on the wiki that explains this. https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Rolling_shutter_effect_animation.gif/330px-Rolling_shutter_effect_animation.gif
It's interesting to get more of a sense as to why this happens. Personally I first noticed this problem when looking at videos of propeller aircraft--it's a very noticeable effect that seems very unusual. I do wonder if this kind of issue is resolved with special filtering, since simply upping the frame rate a lot isn't always practical...
This reminds me of our discussion on sampling and antialiasing. It seems we're just not sampling images at a high enough frequency to properly capture the plane's propellor spinning.