To use the <b>Shape recogition</b> tool you have to \ref import_picture_page "Import a picture" in the view first.Then you can choose to create either <b>contours</b> or <b>corners</b> out from this picture.
To create <b>Contours</b> :
<ol>
<li> In the <b>Picture</b> field select a previously imported picture.</li>
<li> Click on \image html occ_view_camera_dump.png </li>
<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>