XIIMUS 4K CL User Manual. Model: 4096CT. Version 1.4
In order to remove unevenness of the lighting profile and lens curvature along the vector at
the same time as when performing white balancing, each individual pixel along the vector
needs to be scaled to the corresponding red maximum value (L1). Now, in this case, in order
for the line profile on all colour channels to equal line L1, the red channel line also has to be
scaled. Thus, at the beginning of the red line, the lowest pixel value at level L2 has to be mul-
tiplied with a multiplier
R
x
, so that it equals line L1. Accordingly, at the start of blue channel
line, the line L3 has to match line L1 for the camera to be in white balance.
As illustrated in fig. 4.4, the blue channel will have the largest multipliers and the centre of the
red channel line will have multipliers close to unity. Also, the far ends of each colour channel
will have the largest multipliers of the colour channel in question.
Figure 4.4.
Correction in the direction of the vector.
© TVI Vision, 14 July 2006 page 15 ( 56 )
