Midterm 2: Image processing Flashcards
1
Q
X and Y axis of CSF spatial modulation function
A
X-axis: Spatial frequency
Y-axis: contrast sensitivity
2
Q
What spatial frequency are we able to detect the best?
A
around 5-7 cpd
3
Q
Equivalent Snellen acuity of 30 cpd
A
20/20
4
Q
equivalent Snellen of 60 cpd
A
20/10
5
Q
What happens after 60 cpd?
A
Person can’t tell the cycles so it looks uniform no matter the illuminance
6
Q
What kind of filter does human have for contrast sensitivity?
A
band pass
7
Q
How to calculate sensitivity?
A
S = 1 / threshold contrast
8
Q
What is steeper, high spatial falloff or low spatial falloff?
A
High spatial falloff
9
Q
Low sensitivity in infants is due to
A
photoreceptor morphology
