Basler A400K, User Manual

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Basic Operation and Features
3-14 Basler A400k
DRAFT
Enabling Column FPN Shading Correction
A column FPN shading correction overwrites the column FPN shading correction that is done by
the sensor’s self-calibrating circuitry. Once you have a set of column FPN shading correction
values in place, the camera automatically starts to use the generated column FPN shading
correction table to apply the appropriate offset to each pixel to correct for column FPN. Use of
column FPN shading correction can not be disabled.
Resetting Column FPN Shading Correction
A column FPN shading correction overwrites the column FPN shading correction that is done by
the sensor’s self-calibrating circuitry. To reproduce the FPN shading correction done by the
sensor’s self-calibrating circuitry, you can reset the column FPN shading correction to the original
values with the Camera Configuration Tool Plus or by using binary read/write commands from
within your own application to set the camera’s control and status registers (CSRs).
With the CCT+
With the Camera Configuration Tool Plus (see Section 4.1 ), you use the Shading Value Generate
parameter in the Column FPN Shading Correction parameters group to reset column FPN shading
correction.
By Setting CSRs
You can start a reset by writing a value to the Generate field of the Column FPN Shading
Correction CSR (see page
4-23 ).
Section 4.2.2 explains CSRs. Section 4.3.1 explains using read/write commands.
Saving a Set of Column FPN Shading Values to a File
When you generate a set of column FPN shading correction values, the values are placed in the
camera’s volatile memory and they overwrite any shading values that are already in the memory.
The current set of values in the volatile memory is used immediately by the camera. Values placed
in the camera’s volatile memory are lost if the camera is reset or the camera power is switched off.
A400k cameras can save the current column FPN values in the volatile memory to a file in the
camera’s non-volatile memory. Files saved in the non-volatile memory are not lost at reset or
power off. You can save only one set of column FPN values to file in the non-volatile memory.
A save will take four to five minutes.
You can save the current shading values to a file in the non-volatile memory by using the Camera
Configuration Tool Plus (CCT+) or by using binary read/write commands from within your own
application to set the camera’s control and status registers (CSRs).
With the CCT+
With the CCT+ (see Section 4.1 ), you use the Create Column FPN Shading Values File parameter
in the Column FPN Shading Value File parameters group to save the column FPN shading set
currently in the volatile memory to a file in the non-volatile memory.
By Setting CSRs
You can save the current shading correction values to a file in the non-volatile memory by writing
values to the bulk data CSR for column FPN shading values.
Section 4.2.3 explains the bulk data CSRs and explains how to use the CSRs to save the shading
values to a file. Section 4.3.1 explains using read/write commands.