Epson GT-6500 EN - Manual (Page 149)

Parameter range:
-127
≤
d1, d2, d3, d4, d5, d6, d7, d8, d9
≤
127
Each data is a signed byte, and the data format is as follows.
MSB LSB
X X X X X X X X
Absolute value
Sign bit, 0: positive (+), 1: negative (-)
Explanation:
This command downloads 9 coefficient data bits for color correction.
A scanner converts color data according to the following formula.
G’ d1 d4 d7 G
R’ =
×
d2 d5 d8
×
R
B’ d3 d6 d9 B
G’, R’, B’ : Converted data for color correction
G , R , B : Original data
d1, d2, d3, d4, d5, d6, d7, d8, d9: Coefficient values
1
32
Command Reference 3-55