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General
Setup
Reference - Reference system selection
Trace lines - describing the edge search area
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 ROI can
be defined by four points. The two first points define the length and
direction of the trace comb. The other points define the width of the
trace comb. With the rectangular
ROI
a line will define the center trace line - thus
the length and the direction of the trace comb. One point will change the
center point.
- Two-pass line fit - add a second pass to fit the line,
adjusting the search lines to be approximately perpendicular to the
line. This improves the line fit accuracy.
- Center-x - center x of search comb
- Center-y - center y of search comb
- Width - width of search comb
- Length - length of search comb
- Angle - angle of search comb
- Count - number of trace lines
- Distance - distance betwees trace lines
- Width - width of each trace line. See
Edges and contours
- Step (pixels) - step size between samples. See
Edges and contours
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
- Mode - Peaks are default. Threshold is only used when Differentiation
is set to 0. An additional choice is Curve correlation - see below.
More information - see
Filter parameters
Note : Combining 2. order differentiation and polarity are used to find
the center position of light or dark stripes
Edge Detection
- Polarity - Dark to light | Light to dark | All transitions
- Percent threshold - dynamic threshold based on values from
current traceline
- Threshold - (if not percent) value lower values means more sensitivity
- Min threshold - (if percent) minimum percent value used
Correlation search
To search for a known intensity curve rather than an edge, the
correlation search may be helpful. You can select a step or a pulse curve
form, or edit your own shape.
- Step - a step. You can modify leading and trailing edges, and
the slope length
- Pulse - a pulse. You can modify leading and trailing edges,
the slope length and the pulse width
- Custom - create your own shape in the editor described below
- Minimum Std for match - minimum Std (or variation) in image
for a match to be considered
- Use normalized correlation - normalise by removing mean and
equalising Std in both image and curve
Filter
Point cloud
Results
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