Unterschiede

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--- analysistools:pointingdevice [2017/03/17 14:56] – [Modelling with tip positions] oliver
+++ analysistools:pointingdevice [2017/03/17 15:04] (aktuell) – [Introduction] oliver
@@ Zeile 7: / Zeile 7: @@
 If you are a Vicon Nexus user and you are alone with the subject you want to measure it can be handy to use the smartphone and the [[https://www.vicon.com/products/software/vicon-control|Vicon Control App]] for starting and stopping the measurements during positioning the pointer.
+=====Why using a pointer instead of a marker?=====
-=====Why using a pointer?=====
+  * A marker placed on an anatomical landmark can move a lot (e.g. skin motion artefacts). Only pointing such a position in an static trial makes it clear that the defined position is valid only for this.
   * Anatomical landmarks can be obscured by fat (e.g. the Pelvis ASIS markers for overweight subjects)
   * Anatomical landmarks can be obscured from the cameras (e.g. some medial landmarks) or can be too close together (e.g. on the foot), which makes its tracking challenging
-    In order to attach markers, the subject must expose that part of the body, which can be uncomfortable for some subjects
+  * To attach markers, the subject must expose that part of the body, which can be uncomfortable (e.g. Landmarks at the sternum for women)
-    If a tracking marker falls off, or is moved inadvertently, after the anatomical markers have been removed. The standing trial must be recorded again, which requires all anatomical landmarks to be replaced.
 =====Modelling with tip positions=====