Matrix Transformation Custom Mode - Basler ace acA640-90gm User Manual

8.5.3.1

Matrix Transformation Custom Mode

The "Custom" color transformation mode is intended for use by someone who is
thoroughly familiar with matrix color transformations. It is nearly impossible to
enter correct values in the conversion matrix by trial and error.
Custom Mode on acA750-30gc Cameras
The YUV to RGB color matrix conversion is performed by multiplying a 1 x 3 matrix containg the Y,
U, and V color values for a pixel with a 3 x 3 matrix containing correction values. In the 3 x 3 matrix,
the first column is populated by values of 1.0 and cannot be changed. The second and third
columns can be populated with values of your choice. In other words:
1.0 Gain01 Gain02
1.0 Gain11 Gain12
1.0 Gain21 Gain22
Where Gain10, Gain11, etc. are settable values.
Each GainXY position can each be populated with a floating point value ranging from -4.0 to
+3.98438 by using the Color Transformation Value Selector to select one of the GainXX positions
in the matrix and using the Color transformation Value parameter to enter a value for that position.
As an alternative the Gain XY values can each be entered as an integer value on a scale ranging
from -256 to +255. This integer range maps linearly to the floating point range with -256 being
equivalent to -4.0, 64 being equivalent to 1.0, and +255 being equivalent to +3.98438. The integer
values can be entered using the Color transformation Value Raw parameter.
A reference article that explains the basics of color matrix transformation for video data can be
found at:
http://www.its.bldrdoc.gov/pub/ntia-rpt/04-406/index.php
Custom Mode on acA2500-14gc Cameras
The RGB to RGB color matrix conversion is performed by multiplying a 1 x 3 matrix containing the
R, G, and B color values for a pixel with a 3 x 3 matrix containing correction values. Each column in
the 3 x 3 matrix can be populated with values of your choice. In other words:
Gain00 Gain01 Gain02
Gain10 Gain11 Gain12
Gain20 Gain21 Gain22
Where Gain00, Gain01, etc. are settable values.
Basler ace GigE
Y R
=
U G
V B
R
G
B
Color Creation and Enhancement
R
=
G
B
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