Gamma Correction
•
I =
KV
g
•
I = intensity, V = voltage
•
K and
g
are CRT dependent
•
Given an intensity I
,
find
j
as:
•
j
= round (log
r
(I/I
0
))
•
Given
j
, find I
j
= r
j
I
0
and then find the voltage
V
j
for a given pixel as:
•
V
j
= round (I
j
/K)
1/
g