Basler A600f Manual de usuario descargar pdf (Pagina 49)

Basic Operation & Standard Features

BASLER A600

f 3-25

DRAFT

3.7 Color Creation in the A601fc and A602fc

The CMOS sensor used in the A601fc and A602fc 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

A601

fc and A602fc 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 A601

fc and A602fc

When an A601fc or A602fc 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 = 0.30 R + 0.59 G + 0.11 B

U = - 0.17 R - 0.33 G + 0.50 B

V = 0.50 R - 0.41 G - 0.09 B

Once the conversion to YUV is complete, pixels are transmitted from the camera in the YUV

(4:2:2) format as defined in Sections 5.3 and 5.4.

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Basler A600f Manual de usuario Pagina 49