\image html contour_detection_example2.png
+\n
+
To use the <b>Shape recogition</b> tool:
<ol>
<li> Find a zone in the picture which color is representative of the zone you want to find the frontier of. Draw a rectangle on it to take a <b>Snapshot</b>.</li>
- <li> Apply </li>
-
- The \b Result will be a \b Compound of \b Edges or \b Wires from which you can explode the desired edges or wires.
-
- \image html feature_detection_dlg.png
+ \b Example:
+
+ In the example shown above the following snapshot was taken in the middle of the chart
- <b> Output type </b> :
+ \image html feature_detection_dlg3.png
+
+ All the violet and white areas are thus considered as part of the zone we want to find the frontier of.
+
+
+ <li> <b> Output type </b>
<ul>
- <li> \b Spline : each contour will be a single \b edge based on a B-Spline curve</li>
+ <li> \b Spline : The \b result will be a \b Compound of \b Edges. Each contour will be a single \b edge based on a B-Spline curve (it will be smooth).</li>
- <li> \b Polyline : each contour will be a wire made of lines (i.e. a \b Polygon)</li>
+ <li> \b Polyline : The \b result will be a \b Compound of \b Wires. Each contour will be a wire made of lines (i.e. a \b Polygon)</li>
</ul>
+ In both cases each contour can then be retrieved by an explode operation with the appropriate subshape type.
+
+ </li>
+
\note It's better to use the \b Spline output type unless you want to find the frontier of a polygon (rectangle ...)
</ol>
