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Preliminary help The MultiArcFinder inherits its main properties from the RadialArcFinder tool. In
addition it has a Condition feature that allows the user to classify a
circle from each of the polygons into true or false. This is very useful if
you need to check the presence of N circles in an image. See image below
where the presence of 10 bottle with radius 9 mm is detected with on
MultiArcFinder.
Setup
Reference - Reference system selection
Search centers -
Trace lines
- Sector angle - angle of search comb
- Sector width - width of search comb, in degrees
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Angle step
- in degrees
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Inner radius
- of the search comb
- Outer radius
- of the search comb
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Trace step
- normally 1 - given in pixels
Advanced
Filter
- Smooth base - 3 is normally a good value
- Smooth counter - 1 default - given i pixels
- The smoothing increasing with higher values
- Differentiation - More information - see Normalisation
- 0 - give threshold
- 1 - 1. order differentiation - the derivative - default normally
used
- 2 - 2. order differentiation
- Mode - Peak | Threshold
Edge detection
- Polarity - All transitions | Light to dark | Dark to light
- Threshold - the threshold or sensitivity of the arc finder - a
lower value increases the sensitivity
- Remove points closer than - given in pixels or reference
coordinates
Arc Fit
- Fit tolerance - points outside tolerance is not accepted
- Tolerance given in pixels or reference coordinates
- More information -
Line
fit.
- Goodness (points) -
Arc search parameters
- Max search count -
- Search risk (PPM) - 1 default - a lower value will perform more
iterations
- Match select - Best match | First match
Constraints
Radius - Given as min and max value
Results
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OK count
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Error count
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Total count
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All OK
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All Error
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OK Index
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All radius
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All centers
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Min radius
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Max radius
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Min fitted
points
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Max fitted
points
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Visualisation
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Center
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Circle
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EdgePoints
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FittedPoints
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ROI
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Region Of
Interest for the measurement
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TraceLines
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ExecuteCmd support (see also 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=<polygon> |
ok,None |
Sets
the first ROI polygon. See Copy/paste
ROIs for details. |
| Set |
Object=ROI;Number=<number>;
Value=<polygon> |
ok,None |
Sets
the numbered ROI polygon. See Copy/paste
ROIs for details. |
| Add |
Object=ROI;Value=<polygon> |
ok,None |
Adds
ROI polygon to the end of the list. See Copy/paste
ROIs for details. |
| Get |
Object=ROI;Number=<number> |
ok,<polygon> |
Gets
numbered polygon, as Scorpion polygon (StrArr format). |
| Get |
Object=Tuple;Number=<number> |
ok,<tuple> |
Gets
numbered polygon, as Python tuple |
| Clear |
Object=ROI;Number=<number> |
ok,None |
Clears
numbered polygon (makes empty) |
| DeleteAll |
- |
ok,None |
Deletes
all polygons |
Keyboard shortcuts - More
information
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Shortcut
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Command
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Comments
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| Ctrl-Z |
Set
ROI |
Sets
the selected polygon to points marked in the image. If only a single
point is marked, the polygon is moved, centered around the point.
If the tool dialog is not open, the first polygon is set. |
| Ctrl-1
- Ctrl-0 |
Set
polygon 0-10 |
Sets
the numbered polygon to points marked in the image. If only a single
point is marked, the polygon is moved, centered around the point. If
a new polygon is defined this way, any missing polygons in between
are set as empty. |
| Ctrl-Shift-1
- Ctrl-Shift-0 |
Clear
polygon 0-10 |
Clears
the numbered polygon (sets empty). |
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