Midterm 2: Image processing

Question 1

X and Y axis of CSF spatial modulation function

Answer 1

X-axis: Spatial frequency

Y-axis: contrast sensitivity

Question 2

What spatial frequency are we able to detect the best?

Answer 2

around 5-7 cpd

Question 3

Equivalent Snellen acuity of 30 cpd

Answer 3

20/20

Question 4

equivalent Snellen of 60 cpd

Answer 4

20/10

Question 5

What happens after 60 cpd?

Answer 5

Person can’t tell the cycles so it looks uniform no matter the illuminance

Question 6

What kind of filter does human have for contrast sensitivity?

Answer 6

band pass

Question 7

How to calculate sensitivity?

Answer 7

S = 1 / threshold contrast

Question 8

What is steeper, high spatial falloff or low spatial falloff?

Answer 8

High spatial falloff

Question 9

Low sensitivity in infants is due to

Answer 9

photoreceptor morphology