ALLIED Vision Technologies Guppy F-503 - Manual (Page 113)

Description of the data path
GUPPY Technical Manual V7.1.0
113
Color correction (only interlaced GUPPYs)
In order to further improve the color response of complementary color filter
sensors, a color correction is built in SmartView as well as in UniTransform.dll
library.
Color correction is done for daylight spectrum (about 5,000 K).
CyMgYeG is converted to YUV values according the given formulas from SONY
(Chapter
How demosaicing works on page 108).
The color correction RGB
cor
is done outside the camera by the viewer software
SmartView via the following formula (color correction coefficients Cxy are
fixed and can not be changed):
Formula 8: Color correction formula for interlaced GUPPYs
Note

The color correction coefficients can not be changed and can
not be saved via the user profiles.
RGB
cor
R
col
YUV2RGB YUV
  =
YUV2RGB
R
G
B
1.164 Y

1.596 V 128 –    +
1.164 Y

0.813 V 128 –    – 0.391 U 128 –    –
1.164 Y

2.018 U 128 –    +
= =
R
col
Crr Cgr Cbr
Crg Cgg Cbg
Crb Cgb Cbb
1.29948 0.0289296 0.934432 –
0.409754 – 1.31042 0.523692 –
0.110277 0.339351 – 2.45812
= =