12.07.2015 Views

Welcome to Onyx-RAD - Viztek

Welcome to Onyx-RAD - Viztek

Welcome to Onyx-RAD - Viztek

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Annotation : Ellipsethe Ellipse <strong>to</strong>ol but<strong>to</strong>nThis <strong>to</strong>ol creates a (hollow) ellipse on the image. This isoften used <strong>to</strong> circle an ROI (region of interest).To use this <strong>to</strong>ol, click the Ellipse <strong>to</strong>ol but<strong>to</strong>n on theAnnotations <strong>to</strong>olbar (or choose the <strong>to</strong>ol from the Annotationscontext menu) and:1. (left-)Click on an area of the image <strong>to</strong> start theellipse.2. Move the mouse pointer and observe the ellipseexpanding. Move the mouse such that the ellipsewill enclose the ROI.3. (left-)Click <strong>to</strong> set the ellipse in place.Regarding the initial click: it is generally best <strong>to</strong> click a spotthat is above and left of the ROI, as you will then drag theellipse down and <strong>to</strong> the right <strong>to</strong> enclose the ROI. It generallytakes a few practice ellipses <strong>to</strong> master the technique.The easiest way <strong>to</strong> quickly remove the annotation is <strong>to</strong> rightclickthe image (which displays the image context menu)and choosing “Delete All Annotations” from this menu.<strong>Onyx</strong>-<strong>RAD</strong> is a registered trademark of <strong>Viztek</strong>, Inc. © 1995-2002 Page 63

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