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1. In a Graph view, ALT+drag to select it.

   

2. At the bottom of the Marker Editing panel, expand the Filter section, and select whether filtering applies to Ranges, as above, or to Selected Keys.
3. If you're not sure how much filtering to apply to your data, keep the default settings (Cut Off: 0.3 and Threshold: 15) and click Apply. You can reapply this as many times as required.

   

4. In the Graph view and 3D Scene view, check that the trajectory is now smooth over the selected range.

   Tip: To display a tooltip for any of the controls, hover the mouse pointer over the relevant control.

Ensure smooth start and end to filtered trajectories

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SmoothInOutWhen you apply filtering, the Smooth In/Out option in the Marker Editing panel provides smooth blending at the start and end of the filtered section of a trajectory curve.

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1. In the Marker Editing panel, expand the Filter section and select Smooth In/Out.

2. If you want to change how much of the trajectory is affected on either side of the gap, edit the value of the adjacent field. The default is 0.2 (20%). Smoothing works by blending between the original and filtered result by progressively more or less, across the smoothing range.

   

   The filtered section is smoothed at the start and end.

Use the Labeling panel

Use the Labeling panel

You can fix labeling issues using the tools in the Labeling panel. The following steps introduce the main components of the labeling panel. To go straight to examples of how to use it to fix labeling issues, see Fix common labeling issues.

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In the Semi-Automated Labelers section, you can access the Velocity Labeler, which is normally used after automated labeling, on a partially labeled take. You can use it to correct labeling where the path of a single marker consists of multiple trajectories that are consecutive in time with a small gap in between where the marker is unlabeled over part of its trajectory. The Velocity Label option is useful when a marker has been labeled for a range of time, and then becomes unlabeled, yet going forward or backward in time there are multiple trajectories that do not have a large gap between them and are all the same marker. It is best suited for cases when unlabeled trajectories are not many frames away from the labeled marker and the velocity of the marker around the end of the labeled marker and the start of the unlabeled trajectory is fairly constant.

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Fix common labeling issues

The following basic procedures are just a few of the ways in which you can use Shogun Post to clean up data.

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Vicon Shogun 1.3 Post Tutorial - Gap List & Auto Rigid Fill on YouTube.

Identify issues

Identify issues

1. To help you identify issues, in the 3D Scene view, click View Filters, and ensure that in the Scene section, Missing Markers is selected. Also ensure that in the Subjects section, Label is selected and that in the L(abeling) column of the views matrix, Constraints is selected.

   

2. In 3D Scene view, scrub through the whole take (drag the current time indicator along the timeline, or for finer control, press the A or S key), noting times when markers are likely to be occluded (sitting, crouching, subjects interacting, etc).
3. In the marker list in the Labeling panel, note any missing (red) markers and watch for ‘popping’ or moving in the 3D Scene view. Look for any swapped markers (for an example, see the Vicon video 5 - Shogun Post – Labeling Data, which shows an example of a swap of knee and heel markers). Missing markers are clearly visible, highlighted in red. However, after you’ve identified the erroneous markers, it may help with labeling to clear Missing Markers and Labeling Constraints.

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Correct a swap

1. Ensure the Labeling panel is displayed.

2. Split the 3D Scene view (at the top right of the Shogun Post window, click the vertical split button ) and in one of the panes, change to a Graph view, so that you can now see a 3D Scene view, a Graph view and the Labeling panel.
   
   
   

3. In the Labeling panel, ensure Select mode, Forward direction (>), and Cliff are selected.
4. In the 3D Scene view, select a marker that is incorrectly labeled and in the Graph view, zoom in (right-click and drag) and go to the start of the where the swap happens (this should be identifiable on the graph by a sharp change).

   

5. From the position of the marker in the 3D Scene view, decide which is the correct marker and click it in the 3D view.
   In the marker list, its name is displayed in heavier text, and at the top left of the 3D Scene view, the Selection text displays the name of the selected marker.

   

6. Click the wrongly labeled marker in the 3D Scene view and then click the correct marker name in the Labeling panel list.
   The marker is now correctly labeled. To check, scrub back and forward in the 3D Scene view and check that the marker is now behaving correctly.

However, you now have a previously incorrectly labeled marker that is unlabeled from this point forward.

Label an unlabeled marker

Label an unlabeled marker

1. In the 3D Scene view, click on the unlabeled marker to select it. Scrub back and forward to identify where it is correctly labeled. This is the point at which it is correctly colored in the 3D Scene view and the Labeling panel marker list. You can also observe this on the Graph.

   

2. To label a marker using the tools in the Labeling panel, do one of the following, depending on your chosen Mode:
   If you prefer to label using Label mode:
   
   1. In the Manual Labeling Options section, in the Mode line, click Label.
   2. In the marker list in the Labeling panel, click the name of the marker and then in the 3D Scene view, click the marker that is currently unlabeled.
   Or, if you prefer to label by dragging, using Select mode:
   
   1. In the Manual Labeling Options section, in the Mode line, ensure Select mode is selected.
   2. In the Labeling panel, click to select the required marker in the 3D view.
   3. SHIFT+CTRL then click+drag from the selected marker in the Labeling panel to the unlabeled marker in the 3D Scene view.
3. As before, to check the labeling, scrub back and forward in the 3D Scene view and check that the marker is now behaving correctly.

After you have corrected any swaps, you may want to use Shogun Post's diagnostic tools to help to identify gaps (see Check data quality).

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View and select gaps

You can view all the gaps in your scene in the Marker Editing panel, in the Fill Gaps section, by looking at the Gap List. (If you can't see the list, at the top of the Marker Editing panel, click the Gap List button.)

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• As a first step, try automatically filling as many gaps as possible (see Auto-fill with intelligent rigid fill).
• If your scene still contains gaps after using the automatic fill, or if auto-fill is unsuitable, try manually filling the gaps (see Manually fill gaps).

  Tip: To undo unwanted gap-filling, click Undo on the quick access toolbar .

Auto-fill with intelligent rigid fill

AnchorAutoFillRigidAutoFillRigidShogun Post enables you to automatically fill gaps using a rigid fill operation. This looks at all the markers in your scene and then compares them against the marker you are trying to fill. It then uses a combination of similarly moving markers to fill the gap. Finally, it checks the fill to make sure it looks correct and if not, it chooses another set of markers.

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• After first run, it either made an unwanted fill or wasn't able to fill a gap due to a mislabel. Fix the mislabel and then run it again to fill the remaining gaps.
• After first run, it either made an unwanted fill or wasn't able to fill a gap due to the gap being too complex. Fill the gap manually, then run automated gap-filling again to fill any remaining gaps. These can now can be filled due to more data being available.
• After first run, some gaps remain. Loosen the rigidity settings (see Note above) and run it again.

Manually fill gaps

Manually fill gaps

You fill gaps using the Marker Editing panel, normally in conjunction with the Data Health view and/or a Graph view. The Marker Editing panel contains all the tools necessary to fill gaps, alter trajectory keys and filter your data.

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1. To quickly gap-fill the selected marker, on the time bar double-click to move the current time indicator to the relevant frame.
   The affected marker is automatically highlighted in the 3D Scene view (you can right-click and drag to zoom in further to check the marker).

2. To open a Data Health view and a Graph view, as well as a 3D Scene view, split the screen by clicking the Three Views Split Left button at the top of the Shogun Post window and change the views in the new panes.

3. If the Marker Editing panel is not already open, on the Processing tab on the ribbon, click Marker Editing.
4. In theData Health view, find the relevant marker's line, which shows a gray rectangle that represents the gap.

   

5. In the Data Health view, double-click to select the range of the gap.

   

6. In the Marker Editing panel, expand the Fill Gaps section. In the Fill Using Interpolation area, select Selected Ranges (to fill only the current selection), and then click Fill Using Interpolation.

   

   This looks at the keys on either side of the gap and fills it by interpolating between them. It works well for small gaps.

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7. In the 3D Scene view and Graph view, check that your fill has given the required result.

   

8. If the fill does not give an appropriate result, you can click Undo on the quick access toolbar , and try other gap-filling options in the Marker Editing panel (see Options for gap filling).

Options for manual gap-filling

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GapFillOptionsThe appropriate option to use depends on the type of gap that you want to fill.

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To remove occlusion fixing from your data, in the Marker Editing panel, expand the Restore section and select the required option.

Solve during cleanup

Solve during cleanup

During the cleanup operation, each time you finish cleaning up a range, check its solve. To do this:

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