User`s manual

Basic Operation & Standard Features

3-22

BASLER A600f

DRAFT

3.7 Color Creation in the A600fc

The CMOS sensor used in the A600fc 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

A600fc is shown

in Figure 3-10. 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 3-10: Bayer Filter Pattern on the

A600fc

When an A600fc is operating in a YUV color output mode, each pixel goes through a two step

conversion process as it exits the sensor and passes through the camera’s electronics.

In the first step of the process an interpolation algorithm is performed to get full RGB data for the

pixel. (Because each individual pixel gathers information for only one color, an interpolation must

be made from the surrounding pixels to get full RGB data for an individual pixel.)

The second step of the process is to convert the RGB information to YUV. The conversion

algorithm uses the following formulas:

Y = 0.257 R + 0.504 G + 0.098 B + 16

U = -0.148 R - 0.291 G + 0.439 B + 128

V = 0.439 R - 0.368 G - 0.071 B + 128

Horizontal Shift

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