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AW00123404000 Color Creation and Enhancement
Basler ace USB 3.0 177
7 Color Creation and
Enhancement
This chapter provides information about how color images are created on different camera models
and about the features available for adjusting the appearance of the colors.
7.1 Color Creation
The sensors in the color versions of the Basler ace USB 3.0 cameras are equipped with an additive
color separation filter known as a Bayer filter. The pixel formats available on color cameras for pixel
data output are related to the Bayer pattern. You therefore need a basic knowledge of the Bayer
filter to understand the pixel formats. With the Bayer filter, each individual pixel is covered by a part
of the filter that allows light of only one color to strike the pixel. The pattern of the Bayer filter used
on the camera
is as shown in Figure 81 (the alignment of the Bayer filter to the pixels in the acquired
images (with respect to the sensor) is shown as an example only; the figure shows the "BG" filter
alignment). As the figure illustrates, within each square 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.)
Sensor
Pixels
Fig. 81: Bayer Filter Pattern With "BG" Alignment as an Example