Color Creation and Enhancement AW00123402000
156 Basler ace USB 3.0
7.1.1 Bayer Color Filter Alignment
The alignment of the Bayer filter to the pixels in the images acquired by color cameras depends on
the camera model. Table 28 shows the filter alignment for each available camera model.
On all color camera models that have sensors equipped with a Bayer filter, the alignment of the filter
to the pixels in the acquired images is Bayer BG or Bayer GB (see Table 28).
Bayer BG alignment, for example, means that pixel one and pixel two of the first line in each image
transmitted will be blue and green respectively. And for the second line transmitted, pixel one and
pixel two will be green and red respectively. Since the pattern of the Bayer filter is fixed, you can
use this information to determine the color of all of the other pixels in the image.
The Pixel Color Filter parameter indicates the alignment of the Bayer filter to the pixels in the images
as applies to your camera model. Because the size and position of the region of interest on color
cameras with a Bayer filter must be adjusted in increments of 2, the color filter alignment will remain
as Bayer BG or Bayer GB regardless of the camera’s region of interest (ROI) settings.
For more information about the camera’s ROI feature, see Section 8.5 on page 185.
Color Camera Model Filter Alignment
acA640-90uc BG
acA640-120uc BG
acA1300-30uc BG
acA1600-20uc BG
acA1920-25uc GB
acA2000-165uc BG
acA2040-90uc BG
acA2500-14uc GB
acA3800-14uc GB
acA4600-10uc GB
Table 28: Bayer Filter to Sensor Alignment
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