Clarification Q: The examples here remind me a lot of sampling in time, does shutter speed also play a large hand in point sampling (since its capturing a "point in time") as mentioned in lecture 3 (slide 14)? Is point sampling a "side effect" of a faster shutter speed?
brandonlouie
The intuition for a slow shutter speed being blurrier than a fast shutter speed is that for a slow shutter speed, there is more time for light to travel and hit the sensor, resulting in an image that captures the movement of the subject. For a fast shutter speed, there is less time for light to travel and hit the sensor, so the image recorded one that captures less movement
NothernSJTU
When the shutter is open, the camera records the light of all the objects for a period of time. If the shutter is open long enough, the movement of the objects can be captured in the final image. This is called dynamic blur.
jerrymby
Assuming that the movement speed of an object is fixed, a quicker shutter speed allows less movement to occur compare to a slower one. All shutter speed would record motion blur, just that the degree of that blur is different. A fast shutter speed is not capturing an infinitesimal small slice of the world. It still captures a period of time, but just shorter and appears to be no motion to us.
Edge7481
In a sense shutter speed does seem like the physical equivalent to temporal anti-aliasing wherein images are blended over time
llejj
From an anti-alising perspective, motion blur is cool because it seems we don't need to implement supersampling. I looks like each frame automatically takes the average value over a period of time.
stang085
This part reminds me of talking about anti-aliasing in the first homework and how blurring can make motion much smoother to the eye
anavmehta12
A way to time alias is to lower the shutter speed so we introduce motion blur and reduce the highest temporal frequencies of the image.
Clarification Q: The examples here remind me a lot of sampling in time, does shutter speed also play a large hand in point sampling (since its capturing a "point in time") as mentioned in lecture 3 (slide 14)? Is point sampling a "side effect" of a faster shutter speed?
The intuition for a slow shutter speed being blurrier than a fast shutter speed is that for a slow shutter speed, there is more time for light to travel and hit the sensor, resulting in an image that captures the movement of the subject. For a fast shutter speed, there is less time for light to travel and hit the sensor, so the image recorded one that captures less movement
When the shutter is open, the camera records the light of all the objects for a period of time. If the shutter is open long enough, the movement of the objects can be captured in the final image. This is called dynamic blur.
Assuming that the movement speed of an object is fixed, a quicker shutter speed allows less movement to occur compare to a slower one. All shutter speed would record motion blur, just that the degree of that blur is different. A fast shutter speed is not capturing an infinitesimal small slice of the world. It still captures a period of time, but just shorter and appears to be no motion to us.
In a sense shutter speed does seem like the physical equivalent to temporal anti-aliasing wherein images are blended over time
From an anti-alising perspective, motion blur is cool because it seems we don't need to implement supersampling. I looks like each frame automatically takes the average value over a period of time.
This part reminds me of talking about anti-aliasing in the first homework and how blurring can make motion much smoother to the eye
A way to time alias is to lower the shutter speed so we introduce motion blur and reduce the highest temporal frequencies of the image.