Chromasens CD40127_R02 allPIXA_pro_User Manual.docx
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Take notice
that using „Contrast“causes digital increase or decrease of sensitivity.
VidContrastOut(x,y) = Vid BrightnessOut(x,y)* Gain
Vid BrightnessOut (x,y)
Pixel-normalized image after the Vid Brightness correction
(0…2047 in 10Bit area)
Gain
Additionally adjustable “Contrast” for this color separation
(0…1…2.0)
(x, y)
Number of pixels within a line or column
VidContrastOut (x,y)
Output of this step (area 0 … 1023)
NOTE
Calculation is done in the following order (section 4.5.1;
process of the allPIXA pro camera (block diagram)
1. Brightness
2. Contrast
9.7 Camera arrangement
9.7.1 RGB line distance
Name
Name
Set RGB line distance
Function
Delays the line output for the two other lines to match the shift by different
positions on the sensor which is also called “Spatial correction”.
Channels
All
Unit
Float
Step
1/
1024
Linear
Dependency
None
Notes
The value “0” switches this function off.
Line delay can be set up to 5 lines.
With square pixel the viewing angle in transport direction could be up to
36,8° for 5 lines
Camera:
Value CST
Unit
In 1/1 lines
Lower limit
All
0.0
Upper limit
All
5.0
The trilinear lines of the allPIXA pro camera signify that the camera disposes of 3 individual
color lines (RGB) which means that for each image point the accurate information is obtained.
The three line sensors are physically arranged in different locations, resulting in the
acquirement of the individual color channels to an image of a moving object at different points.
Refer to section 4.2
“Design of the allPIXA camera line scan sensor” / sensor alignment.
For spatial correction, the lines are buffered and the respective lines are re-aligned with a
corresponding correction. The color lines have been delayed by a specific number of lines
and, therefore, the values of R, G and B match each corresponding object point. The allPIXA
pro camera enables this compensation with up to 5+5 lines spacing. Correct color images are
only generated correctly if the ratio of the optical resolution is the same as the resolution of
transport direction.
