Basler raL2048-48gm User Manual download pdf (Page 176)

Standard Features AW00118302000

166 Basler racer GigE

10.1.1.3 Using Both Analog Gain and Digital Gain

You can use analog gain and digital gain at the same time. In this case, the amplification factors will

multiply. For example, if you set analog gain to an amplification factor of 4 and use an amplification

factor of 1.2 for digital gain, the total amplification factor will be 4.8. This corresponds to adding

12 dB and 1.6 dB to give a total gain of 13.6 dB.

For optimum image quality, we recommend to set the total amplification as low as possible. If you

need an amplification factor larger than 4 we recommend to set analog gain to 4 and then digital

gain to reach the desired total amplification.

10.1.2 Black Level

Adjusting the camera’s black level will result in an offset to the pixel values output from the camera.

The camera’s black level is determined by the Black Level Raw parameter with the black Level

selector set to All. All pixels in the sensor are affected by this setting.

If the camera is set for a pixel data format with an 8 bit depth, an increase of 16 in a black level

setting will result in a positive offset of 1 in the pixel values output from the camera. And a decrease

of 16 in a black level setting will result in a negative offset of 1 in the pixel values output from the

camera.

If the camera is set for a pixel data format with a 12 bit depth, an increase of 1 in a black level setting

will result in a positive offset of 1 in the pixel values output from the camera. A decrease of 1 in a

black level setting will result in a negative offset of 1 in the pixel values output from the camera.

Setting the Black Level

To set the Black Level Raw All value:

 Set the Black Level Selector to All.

 Set the Black Level Raw parameter to your desired value.

You can set the Black Level Selector and the Black Level Raw parameter values from within your

application software by using the pylon API. The following code snippet illustrates using the API to

set the selector and the parameter value:

// Set Black Level Raw All

Camera.BlackLevelSelector.SetValue ( BlackLevelSelector_All );

Camera.BlackLevelRaw.SetValue( 64 );

If you use analog gain and digital gain at the same time and also use the remove

parameter limits for digital gain with digital gain parameter values below 264: Note

also that the amplification factor for total gain will be 0 if the digital gain setting is 0.

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Basler raL2048-48gm User Manual Page 176