User`s manual

Operation and Features
3-32 BASLER A202
k
DRAFT
3.10 Color Creation in the A202kc
The CCD sensor used in the A202kc is equipped with an additive color separation filter known as
a Bayer filter. With the Bayer filter, each individual pixel is covered by a micro-lens which allows
light of only one color to strike the pixel. The pattern of the Bayer filter used in the A202
kc is shown
in Figure 3-15. As the figure illustrates, within each block of four pixels, one pixel sees only red
light, one sees only blue light, and two pixels see only green light. (This combination mimics the
human eye’s sensitivity to color.)
Figure 3-15: Bayer Filter Pattern on the A202
kc
A single value is transmitted out of the camera for each pixel in a captured image. If you want to
get full RGB color information for a given pixel in the image, you must perform a color interpolation
using the information from the surrounding pixels. Some frame grabbers are capable of
performing the color interpolation and many algorithms are available for performing the
interpolation in your host PC.