Basler A400K Manual do Utilizador descarregar pdf (Página 87)

AW00118501000 Features

Basler racer Camera Link 79

8.2.1.2 Digital Gain

Adjusting the camera’s digital gain will digitally shift the group of bits that is output for the pixel

values from each ADC in the camera.

Increasing the digital gain parameter value will result in an amplified gain and therefore in higher

pixel values. Decreasing the digital gain setting will result in a decreased gain and therefore in lower

pixel values.

The digital gain parameter values can be set on an integer scale ranging from 256 to 2047. This

range of settings is linearly related to a range of amplification factors where a parameter value of

256 corresponds to 0 dB and gain will not be modified and a parameter value of 2047 corresponds

to 18.057 dB and an amplification factor of approximately 8.00.

You can use the formula below to calculate the dB of gain that will result from the Gain Raw

parameter values:

Note that due to the nature of digital gain certain gray values will be absent in the image ("missing

codes") if digital gain is set to a value larger than 256.

You can use the remove parameter limits feature to remove to lower limit for digital gain parameter

values. When you use the remove parameter limits feature you can also set digital gain parameter

values in the range from 0 to 256. This corresponds to a range of amplification factors from 0 to

approximately 0.99.

For more information about the remove parameter limits feature, see Section 8.3 on page 82.

Setting the Digital Gain Using Basler pylon

To set the Gain All parameter value:

 Set the Gain Selector to All.

 Set the Gain parameter to your desired value.

If the digital gain parameter value is set below 256 using the remove parameter

limits feature: In this case, regardless of the brightness of illumination, the camera

will not be able to reach the maximum gray values that otherwise could be

reached. For example, if the camera is set to a 12 bit pixel data format, the

maximum gray value of 4095 can not be reached if the digital gain parameter value

is set below 256.

Gain dB 20

log

Gain Raw

256

--------------------------





Gain dB 20

log Gain Raw48.165–=

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 129 130

Sem comentários

Basler A400K Manual do Utilizador Página 87