Allied Vision Goldeye G, Техническое руководство

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84 Goldeye G Technical Manual V 2.0.0
Data processing path
Background correction (BC)
The background correction is used as an additional correction, based on actual
operating conditions, to optimize the result of the non ‐ uniformity correction.
The correction data for the non ‐ uniformity correction is factory ‐ provided and
based on specific conditions: exposure time, sensor temperature, and sensor gain
setting. If the conditions during camera operation are different, non ‐ uniformity
correction does not work at best performance.
To compensate for remaining non ‐ uniformity, the live image is corrected with a
previously recorded dark image. This image is subtracted from the precorrected
image to reduce the fixed pattern noise.
In order to adapt the background correction to local conditions, customers acquire
their own volatile correction image. It is also possible to shift the offset individually,
if needed.
The table below describes the features controlling the background correction and
the functionality associated with them.
ImageCorrectionControl / BackgroundCorrection
Category for background correction control
BCDatasetMeanValue
Type: Integer Provides the mean value of the correction image.
Access: R
Unit:
Visibility: Beginner Copy the value to BCDatasetOffsetValue to get
the same brightness level behind the active
background correction as the uncorrected image
has.
Values:
BCDatasetOffsetValue
Type: Integer Specifies the output offset of the corrected
image.
The scale is always based on the maximum pixel
depth the camera supports, independent of the
active output pixel format.
Access: R/W
Unit:
Visibility: Beginner
Values:
Table 42: GenICam features for the background correction