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--- visual3d:documentation:modeling:marker_sets:cluster_size [2024/06/19 12:48] – sgranger
+++ visual3d:documentation:modeling:marker_sets:cluster_size [2024/07/17 15:45] (current) – created sgranger
@@ Line 1: / Line 1: @@
-{{{{{{{{{{to track a segment, a minimum of three noncolinear targets are required.
+====== Cluster Size ======
-as long as the three targets are not in a straight line, the segment can be tracked. however, the distance between the targets will affect your tracking.
+To track a segment, a minimum of three noncolinear targets are required.
-for example, assume you have a segment as shown below:\\
+As long as the three targets are not in a straight line, the segment can be tracked. However, the distance between the targets will affect your tracking.
-clustersize_segment.png\\
+For example, assume you have a segment as shown below:\\
+{{:ClusterSize_Segment.png}}\\
-there are two options, you can either:
+There are two options, you can either:
   * put the targets spread out over the entire segment
   * place the targets close together
-==== spread out tracking targets ====
+=== Spread Out Tracking Targets ===
+If the targets are spread out over the segment:\\
+{{:ClusterSize_Large_Segment.png}}\\
-if the targets are spread out over the segment:\\
-clustersize_large_segment.png\\
+It takes a large amount of target movement to produce a large change in the position and orientation of the segment:\\
+{{:ClusterSize_Large_Segment_Rotation.png}}\\
-it takes a large amount of target movement to produce a large change in the position and orientation of the segment:\\
-clustersize_large_segment_rotation.png\\
+=== Close Together Tracking Targets ===
-==== close together tracking targets ====
+If the targets are spread close together:\\
+{{:ClusterSize_Small_Segment.png}}\\
-if the targets are spread close together:\\
-clustersize_small_segment.png\\
+It takes a small amount of target movement to produce a large change in the position and orientation of the segment:\\
+{{:ClusterSize_Small_Segment_Rotation.png}}\\
-it takes a small amount of target movement to produce a large change in the position and orientation of the segment:\\
-clustersize_small_segment_rotation.png\\
+=== Application ===
-==== application ====
+The closer the targets are together, the more susceptible the tracking will be to noise. So try to use best judgement when placing markers/defining clusters.
-the closer the targets are together, the more susceptible the tracking will be to noise. so try to use best judgement when placing markers/defining clusters.
+This is true for tracking any segment, but it tends to be most relevant when tracking the pelvis (using a small cluster on the lower back vs using the ASIS and PSIS) or tracking the foot (using a heel cluster vs heel and met targets).
-this is true for tracking any segment, but it tends to be most relevant when tracking the pelvis (using a small cluster on the lower back vs using the asis and psis) or tracking the foot (using a heel cluster vs heel and met targets).
-}}}}}}}}}}