|
This tool finds
one or more lines using a sector trace comb. The trace lines are arcial
following the sector circle as illustrated below.
Setup
Reference - Reference system selection
Trace lines - describing the edge search area
- Center-x - center x of search comb
- Center-y - center y of search comb
- Sector angle - angle of search comb
- Sector width - width of search comb
- Radius - radius of the trace comb
- Radial width -
- Radial step -
Search criteria
- Polarity - All transitions | Light to dark | Dark to light
- Edge threshold - the threshold or sensitivity of the edge
detector - a lower value means more sensitivity
Edge finder
- Mode - Top | Threshold. Top is default. Threshold is only used when Differentiation
is set to 0.
Advanced
Filter
- Trace step -
- 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
- Normalisation width -
- Normalisation selector -
Arc Fit
- Fit tolerance - points outside tolerance is not accepted
- Tolerance given in pixels or reference coordinates
- More information - Line fit.
- Good fraction (%) -
- Search risk (PPM) - 1 default - a lower value will perform more
iterations
Results
|
Line (x,y)
|
Coordinates
of the line’s start and end points
|
|
Angle
|
The line
angle
|
|
Center
distance
|
|
|
Gradient
|
|
|
Line-fit
|
RMS-value
of the line fit; average deviation (the lower, the better)
|
|
Line
coverage
|
|
 Visualisation
|
ROI
|
Region Of
Interest
|
|
Edge points
|
The found
edge points
|
|
Fitted
points
|
|
|
Line
|
The found
line
|
|
Trace lines
|
Trace lines
|
|
