Arc Edge Locator Magnitude Threshold Sets the acceptable magnitude value for potential edges. This value is expressed as an abso- lute value. There are two magnitude lines: an upper (positive) threshold and lower (negative) threshold. Possible values are from 0 - 255. Edge Magnitude expresses the strength of a potential edge. The (green) magnitude curve, represents magnitude values across the region of interest. Potential edges must have a mag- nitude greater than the upper threshold, or lower than the lower threshold. See the following figure. Interpreting the Magnitude Threshold in the display area Edge Constraint Editor This tool uses a form for defining the constraints.
To set constraints, from the object editor: 1. Select Configuration > Properties > Search Parameters Click Search Parameters to select it. 2. Click the browse icon ( ). The following window opens. ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 377