Pco pixelfly qe, Руководство по эксплуатации

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2. Functional Principle
!
PCO 2006
pixelfly
2.2 Color Definition Algorithm
Color sensors with RGB filter for the colors red, green and blue
are used for the color cameras. The CCD sensor records for
each pixel the light information as grey level with 12 Bit dynamic
(RX, GX, BX).
With the help of the camera control software, for each pixel the
12 Bit data is converted by interpolating into a 8 Bit triplet (P
RED
,
P , P
GREEN BLUE
).
For this interpolation following algorithm is applied:
Algorithm 1 This algorithm optimises the color resolution.
A red, green and blue part of the color for virtual pixels will be
calculated. These virtual pixels are placed between the original
pixels. In CamWare this algorithm is also called as ‘Smooth’.
"
The first pixel on the top left side is always "red".
"
Between the physical pixels, there are virtual pixels P
X
which
are computed with the algorithm described below.
R
1
G
13
R
9
G
5
G
2
B
14
G
10
B
6
R
3
G
15
R
11
G
7
G
4
B
16
G
12
B
8
P
X
...
...
Virtual Pixel
Physical Pixel
Conversion algorithm for the new pixel P
X
:
P
= ( 9 R + 3 R
RED 11 3
+ 3 R
9
+ R )/16
1
P = ( G
GREEN 7
+ G )/2
10
= ( 9 B P
BLUE 6
+ 3 B
8
+ 3 B + B )/16
14 16
Algorithm 2 This algorithm optimises the spatial resolution. For each physi-
cal pixel, a color value (red, green and blue) is calculated, re-
lated to the corresponding neighbour pixel.
Example for Pixel
6
P = ( R
RED 1
+ R
3
+ R
9
+ R )/4
11
P = ( G
GREEN 2
+ G
5
+ G
7
+ G )/4
10
P = B
BLUE 6
Example for Pixel
7
P = ( R
RED 3
+ R )/2
11
P = G
GREEN 7
P = ( B
BLUE 6
+ B )/2
8