I kind of get why light field is 4D? From lecture, my understanding is that it's because the intersection with the world is x,y and the lens aperture is u,v, so we can plot the ray as x,y,u,v for all the intersections. Plotting is kinda hard so we're just looking at a cross section. I was curious how you could actually record a light field and so I found the website below which was helpful and has some really interesting setups for how we can capture this data (it looks like a picture of the camera in the lecture slides is also featured here!)
I kind of get why light field is 4D? From lecture, my understanding is that it's because the intersection with the world is x,y and the lens aperture is u,v, so we can plot the ray as x,y,u,v for all the intersections. Plotting is kinda hard so we're just looking at a cross section. I was curious how you could actually record a light field and so I found the website below which was helpful and has some really interesting setups for how we can capture this data (it looks like a picture of the camera in the lecture slides is also featured here!)
http://lightfield-forum.com/what-is-the-lightfield/