Basler A600f Manual de usuario descargar pdf (Pagina 43)

Basic Operation & Standard Features

BASLER A600

f 3-19

DRAFT

As shown in the top graph in Figure 3-8,

setting the brightness higher than the

default value of 725 moves the

response curve to the left. This would

increase the 8 bit value output from the

camera for any given 10 bit value from

the sensor and thus increase the

apparent brightness of the image.

As shown in the bottom graph, setting

the brightness lower than the default

value of 725 moves the response curve

to the right. This would decrease the 8

bit value output from the camera for any

given 10 bit value from the sensor and

thus decrease the apparent brightness

of the image.

Figure 3-8: Brightness Setting Changes Mapping

3.5.1 Setting the Gain

The camera’s gain is determined by the setting of the Value field in the Gain control register (see

page 4-24). The setting can range from 0 to 255 (0x00 to 0xFF). Typical settings and the resulting

amplification are shown in Table 3-1.

Table 3-1: Gain Settings

Decimal Hex dB Amplification

Factor

Decimal Hex dB Amplification

Factor

0x00 0.0 x 1.0 128 0x7F 8.0 x 2.5

28 0x1C 2.5 x 1.3 170 0xAA 9.5 x 3.0

43 0x2A 3.5 x 1.5 213 0xD4 10.9 x 3.5

85 0x55 6.0 x 2.0 255 0xFF 12.0 x 4.0

Because the sensor used on the A600f has a direct digital output, the implementation

of the gain settings on A600

f cameras is different from the implementation on other

Basler cameras. This means that you can not directly compare the response of an

A600

f camera to another Basler camera with the same gain setting. For example, if

you compare the response of an A600

f with the gain set to 100 and an A301f with the

same gain setting, you will see a significant difference. This happens because the

gain scales on the two cameras are implemented differently and are not directly com-

parable.

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