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A marker may disappear for a few frames in 3D but one should strive to have 3D of all markers throughout the activity. Should a marker disappear for longer times the operator may manually notify the software of a re-appearance.

APAS-XP is designed to facilitate the processing of a subject starting with the collecting of the video of interest and ending with the displaying of 3D figures. Transitions between the various APAS modules occur seamlessly without the operator having to manually exit one module and start another. Also the relevant files created in one module are automatically passed to the next automatically.

For users of APAS-XP, the starting point of an analysis is the collecting of video data of the subject performing the activity of interest. The module CapDV will collect simultaneously up to 6 DV cameras directly to the hard disk. In the process the video files can be automatically trimmed based on a synch event recorded in the audio of the captured video. For activities that do not generate an impact sound that is picked up on the audio, a simple clap of the hands works adequately.

With captured video files ready, the operator selects the "Digitize" button. CapDV will transition to the Digitizing Module. All the user needs to do is to specify the activity of interest. The Digitizing Module will create a digitizing view for each AVI file create by CapDV and display the proper video. The operator then digitizes the control points or reads the control point digitizing from another sequenceand starts the auto-digitizing function and the software will automatically digitize the views using the 3D Auto-Track algorithm. When the auto-digitizing completes, the Digitize Module can be configured to process the digitizing into 3D coordinates and to start either the Display or APASView module displaying a stick figure view of the 3D figure.

For APAS-XP users the Digitize Module can be configured to:

1) When a project is created the software can

a) create no views

b) create a single view

c) create multiple views

The created multiple views is also a new menu option. When multiple views is selected a dialog appears which expedites the assigning AVI files to views and assigning View descriptions.

2) When opening an existing project the software can

a) open no views

b) open last view created

c) open all views

3) There are various processing options

a) Transform/Smooth silently when transform has been selected. No dialog of options will appear, merely a status box.

b) Transform/Smooth upon completion of 3D AutoTrack.

c) Run Display/APASView using 3D file created in b).

4) User has a choice of selecting either Display or APASView as the module to run when "Analyze" is selected.

Also when performing tasks such as reading control points or opening AVI files, the system can manage multiple files simultaneously with the user only having to specify one file/view and the software will manage the remaining.

Last modified on 04/06/10. Copyright 1994 - 2005, all rights reserved, Ariel Dynamics Inc. Please send your comments or feedback to or use our feedback form . Our privacy policy is here .