Basler slA1000-30fm, Руководство пользователя

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Standard Features
104 Basler scout light
9.2 Black Level
Adjusting the camera’s black level will result in an offset to the pixel values output by the camera.
Increasing the black level setting will result in a positive offset in the digital values output for the
pixels. Decreasing the black level setting will result in a negative offset in the digital values output
for the pixels.
Effect on All Camera Models Except the slA750-60fm
If the camera is set for a pixel data format that yields 8 bit effective pixel depth (Mono 8, Bayer BG
8, Bayer RG 8, YUV 4:2:2 Packed, YUV 4:2:2 (YUYV) Packed), an increase of 16 in the black level
parameter setting will result in a positive offset of 1 in the digital values output for the pixels. And a
decrease of 16 in the setting will result in a negative offset of 1 in the digital values output for the
pixels.
If the camera is set for a pixel data format that yields an effective pixel depth of 12 bits per pixel
(Mono 16, Mono 12 Packed, Bayer BG 16, Bayer RG 16, Bayer BG 12 Packed), an increase of 1
in the black level parameter setting will result in a positive offset of 1 in the digital values output for
the pixels. A decrease of 1 in the setting will result in a negative offset of 1 in the digital values output
for the pixels.
Effect on slA750-60fm Models
An increase of 4 in the black level parameter setting will result in a positive offset of 1 in the digital
values output for the pixels. And a decrease of 4 in the setting will result in a negative offset of 1 in
the digital values output for the pixels.
Setting the Black Level
The black level can be adjusted by changing the value of the Black Level Raw parameter. The Black
Level Raw parameter value can range from 0 to 255 on all camera models except the slA750-60fm.
On slA750-60fm cameras, the parameter value can range from 0 to 64.
To set the Black Level Raw parameter value:
„
Set the Black Level Selector to Black Level All.
„
Set the Black Level Raw parameter to your desired value.
You can set the Black Level Selector and the Black Level Raw parameter value 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:
Camera.BlackLevelSelector.SetValue ( BlackLevelSelector_All );
Camera.BlackLevelRaw.SetValue( 32 );
For detailed information about using the pylon API, refer to the Basler pylon Programmer’s Guide
and API Reference.
You can also use the Basler pylon Viewer application to easily set the parameters.
For more information about the pylon Viewer, see Section 3.1 on page 17 .