lecture 4

Question 1

what is frame rate?

Answer 1

number of pictures (frames) per second. (fps)

Question 2

if fast events are wanted to be captured clearly, what speed of frame rate do we want?

Answer 2

high frame rate

Question 3

aperture

Answer 3

size of the opening of the lens. larger aperture allows more light in but reduces depth of field. (f-stops)

Question 4

shutter

Answer 4

Opens and closes to expose sensor to light. Slower shutter, more light, but can cause motion blur. Fast movements need fast shutter (and lots of light). (1/???)

Question 5

ISO

Answer 5

how sensitive it is to light. can lighten dark pictures but will add graininess. best image quality at low ISO values, but needs lots of light.

Question 6

what does a wide lens make near object look like?

Answer 6

appear larger then they are.

Question 7

why is video calibration needed?

Answer 7

to make linear measurements. relates the pixels to real world units.