Yuv Conversion; Rgb - Allied Vision Technologies F-201B AVT Dolphin Manual

Interpolation (BAYER demosaicing)
In interpolation a red, green or blue value is determined for each pixel. Only two lines
are used for this simple interpolation:
Input:
Output:
=
P 1 R
red
=
P 1
green
=
P 1 B
blue
Color cameras begin outputting the image in line two and finish in line Y (maximum
image height minus two). This is a side-effect of BAYER demosaicing. The adjustable
maximum image height is also two lines less than in the b/w variant.
Please note that on the color camera a black border one pixel wide forms on the
left and right image borders also as a consequence of BAYER demosaicing, because
the image width displayed on the color camera is not scaled down.
Color correction
Color correction is calculated along with YUV conversion and mapped via a matrix like
this.
=
*
red Crr
=
*
green
=
*
blue Crb
On the color camera color correction is also deactivated in Mono8 or Mono16 mode (raw
image transport).
7.7.1

RGB

The conversion from RGB to YUV is done using the following formula:
= ⋅
Y 0 3 .
= −
U . 0 169
=
V . 0 498
R1
G3
Figure 30 Interpolation
=
1 P 2 R 2
red
+
G 1 G 3 G
=
P 2
green
2
=
1 P 2 B 1
blue
⋅ + ⋅ +
red Cgr green
⋅ + ⋅
Crg red Cgg green
⋅ + ⋅
red Cgb green

YUV conversion

+ ⋅ + ⋅
R . 0 59 G . 0 11 B
⋅ − ⋅ +
R . 0 33 G . 0 498
⋅ − ⋅ −
R . 0 420 G . 0 082
G1 R2 G2
B1 G4 B2
P1 P2 P3
=
P 3 R 2
red
+
1 G 4 G
=
P 3
green
2
=
P 3 B
blue
⋅
Cbr blue
+ ⋅
Cbg blue
+ ⋅
Cbb blue
⋅ +
B 128
⋅ +
B 128
+
2 G 4
2
2
33