Chapter
4
Reference Manual
IVC-2D
76
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SICK AG • Advanced Industrial Sensors • www.sick.com • All rights reserved
Filter
Detail Extraction
The Detail Extraction tool finds image details that “stick out” from the background. In 2D
images details that are in contrast with the background are enhanced, such as dark text on
bright background, bright text on dark background, spots, misprints or other defects on
surfaces.
It is recommended to use the interactive setup to customize the parameters. Double-click
on the
Setup
button to open the interactive setup window. For more information on the
interactive setup, see Detail Extraction Setup on page
The result from the tool is a new image where only two intensity values are represented –
bright for details and dark for background.
Original image
Filtered with Detail
Extraction
Thresholded image
Figure –Filtering an image with the Detail Extraction tool, compared with thresholding the
image.
In the
Operator Type
parameter you set how the deviation search should be carried out.
Pixels near the edges of the ROI are affected by pixels outside the ROI.
Input Parameters
01 = Source Bank
Image bank containing the image to be filtered
02 = ROI Definition Step
Previous program step defining the ROI to be used by
this tool
03 = Operator Type
Defines which set of neighbouring points to consider
when locating deviating points:
Horizontal
Compare the current point to
the horizontal neighbours.
Vertical
Compare the current point to
the vertical neighbours.
Four
points
Compare the current point to
the horizontal and vertical
neighbours.
Eight
points
Compare the current point to
the horizontal, the vertical and
the diagonal neighbours.
Full Region(slow)
All pixels inside the operator
radius are considered
04 = Threshold
The minimum difference in gray value between a pixel
and the background that is allowed to consider the
pixel a detail.
Note: