Hi,
Below is what the old documentation shows for SCNR:
1. Is the parameter "a" related to the amount slider? If so, where should "a" show up for the Average Neutral method?
2. For Average Neutral it would seem that if R and B are nearly equal (likely neutral pixel) and G is larger than R and B (or the pixel wouldn't look green)- then the average (m) will always be chosen?
3. What is the expression for the Minimum Neutral Protection?
4. I can't seem to figure out when a green pixel is embedded in a non neutral pixel (that is R does not equal B)- when do any of the expressions do better than average neutral?
Curious minds....
-adam
Maximum Mask Protection
m = Max( R, B )
G' = G×(1 — a)×(1 — m) + m×G
Additive Mask Protection
m = Min( 1, R+B )
G' = G×(1 — a)×(1 — m) + m×G (same as Maximum Mask)
Average Neutral Protection
m = 0.5×(R + B)
G' = Min( G, m )
Maximum Neutral Protection
m = Max( R, B ) (same as Maximum Mask)
G' = Min( G, m ) (same as Average Neutral) |
