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Description
This Edge Snap tool assists the user in finding edges. "
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Depending on how the parameters are set the snap tool will "snap" or
find the nearest edge to where the user dropped and clicked the point.
Settings
To edit setting of snap tool right-click on the "Distance" tool. A drop down menu will appear, select snap. This will pull up the Edge Snap's property page.
The settings found within this properties page will set how exact the point will come to the edge.
- Search Radius: This will set in pixels the radius of the cirlce defining the area the tool will search for the edge from where the user drops the point.
Min Intensity: The number set here is the minimum intensity of the edge that the tool will allow to be an image. So if the min intensity is set to 10, then
the edge must have at least 10 grade level differences to be an edge
that the tool will find.
- Strong: if this is checked the tool will find "Sobel" edges, if it is not
checked the edges it will find are "Roberts" edges. The main user
difference between the Sobel and the Roberts edges is that the Sobel is
more sensitive to finding edges (meaning it may be able to find edges
that the Roberts edge cannot). The actual difference between the two it
the mathematical formula used to find the edge.
- Strength: once the tool is run a number will appear here to indicate the strength of the edge.
Once these settings are set the user may click on the image close to an edge
to find the edge. Using the distance tool for example, then if the user clicks on another edge the distance
portion of the tool will turn on to find the distance between the two
points that have been dropped.
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