visual3d:documentation:modeling:marker_sets:cluster_size
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| visual3d:documentation:modeling:marker_sets:cluster_size [2024/06/14 17:24] – created sgranger | visual3d:documentation:modeling:marker_sets:cluster_size [2024/07/17 15:45] (current) – created sgranger | ||
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| - | |**Language: | + | ====== |
| - | + | ||
| - | |===== Contents =====\\ \\ \\ \\ * [[# | + | |
| To track a segment, a minimum of three noncolinear targets are required. | To track a segment, a minimum of three noncolinear targets are required. | ||
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| For example, assume you have a segment as shown below:\\ | For example, assume you have a segment as shown below:\\ | ||
| - | [[File: | + | {{:ClusterSize_Segment.png}}\\ |
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| * place the targets close together | * place the targets close together | ||
| - | ==== Spread Out Tracking Targets | + | === Spread Out Tracking Targets === |
| If the targets are spread out over the segment:\\ | If the targets are spread out over the segment:\\ | ||
| - | [[File: | + | {{: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:\\ | It takes a large amount of target movement to produce a large change in the position and orientation of the segment:\\ | ||
| - | [[File: | + | {{:ClusterSize_Large_Segment_Rotation.png}}\\ |
| - | ==== Close Together Tracking Targets | + | === Close Together Tracking Targets === |
| If the targets are spread close together:\\ | If the targets are spread close together:\\ | ||
| - | [[File: | + | {{: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:\\ | It takes a small amount of target movement to produce a large change in the position and orientation of the segment:\\ | ||
| - | [[File: | + | {{: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/ | The closer the targets are together, the more susceptible the tracking will be to noise. So try to use best judgement when placing markers/ | ||
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| 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). | ||
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| - | Retrieved from "" | ||
visual3d/documentation/modeling/marker_sets/cluster_size.1718385853.txt.gz · Last modified: by sgranger