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This
tool uses two symmetrical trace combs to find two approximately parallel
lines. The distance and angle between the lines are calculated. When the
lines are not parallel, the distance is calculated as follows: The middle
line is drawn between the lines. The point where this middle line crosses
the middle normal of the base line is found. In this point a normal to the
middle line (the base middle normal) is drawn crossing each of the two
measured lines. The distance is measured between these points of
intersection.
Setup
Reference - Reference system selection
Orientation - the tool's region of interest. Orientation
of the trace comb’s base line. Choose either start point or center
point for the base line.
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Center-X - center x of roi
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Center-Y - center y of roi
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Width - width of base line
- Angle
- angle of trace comb
Search lines
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Count - number of
trace lines
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Start point - position of
starting point on trace line given in reference coordinates
- End point - position of
end point on trace line given in reference coordinates
- Inverted the sign of start
and stop point will change the direction of the trace comb
Step length - normally 1 -
given in pixels
Line width - 0 - trace line is not averaged - a higher value
will average N pixels perpendicular to the trace comb
Point & Click Clipboard Support
The ROI can be managed by the buttons 
- Paste - paste the ROI from the image to the scorpion clipboard
- Copy - copy the ROI to the image from the scorpion clipboard
Point & Click Clipboard Support
 The
line defines the baseline of the two tracelines. The line defines the width
and the center of the two tracecomb. To edit length of tracecomb used the
tool's length field.
One point will change the ROI center point.
Edge detection
- Threshold - the threshold or sensitivity of the edge detector -
a lower value increases the sensitivity
- Polarity - All transitions | Light to dark | Dark to light
Advanced
Search parameters
- Search mode - Peak | Threshold
- Fit tolerance - points outside tolerance is not accepted
- Tolerance given in pixels or reference coordinates
- More information -
Line
fit.
- Goodness (points) - minimum number of points fitted to
line to be accepted
- Risk (PPM) - typical value 1 - a lower value will increase the
number of iteration to find the line
Filter
- Smooth base - 3 is normally a good value
- Smooth counter - 1 default - given i pixels
- The smoothing increasing with higher values
- Differentiation
- 0 - give threshold
- 1 - 1. order differentiation - the derivative - default normally
used
- 2 - 2. order differentiation
Results
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Width
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In
pixels
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Parallelity
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0:90
degrees, 1:0 degrees
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Parallelity
angle
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Base
line angle
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Line-fit
1
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RMS-value
of the line-fit; average deviation (the lower, the better)
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Line-fit
2
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RMS-value
of the line-fit; average deviation (the lower, the better)
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Center
x,y
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Position
of the center point
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Line
1
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Position
of line 1
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Line
2
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Position
of line 2
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Center
line
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Position
of center line
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Visualisation
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Band
line
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Base
line
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The
middle line between the searched lines
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Base
middle normal
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Center
point
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Edge
lines
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Edge
point clusters
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Left
trace line samples
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Right
trace line samples
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ScanRect
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The
region of interest
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Trace
lines
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Width
lines
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ExecuteCmd support - more information
executeCmd
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Command
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Parameters
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Return values
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Comments
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Set |
Object=ROI;Value=<center/baseline> |
ok,res |
Sets the tool's ROI. See Copy/paste
ROIs for details. |
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Get |
Object=ROI |
ok,<baseline> |
Current ROI baseline |
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