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--- optitrack_motion_capture_system_motion_tracking [2017/05/30 16:49] – hyunheelee
+++ optitrack_motion_capture_system_motion_tracking [2017/06/18 18:00] (current) – hyunheelee
@@ Line 21: / Line 21: @@
 Please take look at up the "Optitrack Motion Capture System Setup Guide" http://daslhub.org/unlv/wiki/doku.php?id=optitrack_motion_capture_system_setup_guide
-Once you know how to record the "dots" movement, you can get the position data through "Arena" software program.
-But, you need to use other tool(e.g. matlab or excel) for calculating velocity.
 <fc blue>
@@ Line 40: / Line 38: @@
 **Step 2.**
-{{ hh_mocap:pic2.jpg500 |}}
+{{ hh_mocap:pic2.jpg?500 |}}
-Attach the dots on the back of torso.
+Attach the dots on the back of torso and pelvis of side.
 **Step 3.**
-{{ hh_mocap:pic3.jpg500 |}}
+{{ hh_mocap:pic-8.jpg?500 |}}
+{{ hh_mocap:pic-7.jpg?500 |}}
+{{ hh_mocap:pic4.jpg?500 |}}
 Attach the dots on the hands.
-**Step 4.**
-{{ hh_mocap:capture4.png?500 |}}
-Gives name for rigid body and click the "Create" button on right hand side and click "Next".
-**Step 5.**
+====Start to Capture the motion====
-{{ hh_mocap:capture5.png?500 |}}
-You need to set the "Origin" of rigid body.
-Either way, you can choose one of the dots of rigid body or center of rigid body and click "Next".
+**Start to Capture**
+{{ hh_mocap:pic-1.png?500 |}}
+Click the "Capture" tap on the bottom of "Arena" software interface and then click the "play" button,
+and if you are ready to record, click the "record" button.
-**Step 6.**
+**Video of Motion Capture**
-{{ hh_mocap:capture6.png?500 |}}
+{{youtube>lRoYwiJrUfo?large}}
-If you want to attach the "3D polygon" in rigid body, you can choose one of the shape.
-If you do not want to attach just leave it. And click "Next".
-**Finish.**
-{{ hh_mocap:capture7.png?500 |}}
-Click "Finish"
-And check that there is file you named under the "Rigid Bodies" on the left hand side.
-====Trajectorize====
-Once you have made the rigid body, you can trajectorize it for export data.
-{{ hh_mocap:capture-1.png?500 |}}
-Right click the file under the "Take-2D data" and click "Trajectorize" button and check that there is file under the "Takes-trajectories" on the left hand side.
-====Position data====
-After trajectorize, you can click the origin of the rigid body and play video or dragging the time cursor on the bottom, you can see the position data on the right hand side corner of video.
-Also, you can make raw data sheet with it.
-{{ hh_mocap:capture10.png?500 |}}
-It shows 3D(x,y,z) position data and orientation angle data.
-====Export data====
-If you want to get raw data, you can have data for position and orientation by export data.
-{{ hh_mocap:capture8.png?500 |}}
-Right click the file under the "Takes-trajectories" and click "Export BVH" or "Export C3D" or "Export FBX" button whatever you prefer to export file.
-{{ hh_mocap:capture9.png?500 |}}
-This is the raw data BVH file that exported from "Arena" software.
-You can change this file to "txt" or "excel" file for loading to other software tools.
-====Acquire velocity data====
-You can get velocity data by derivative position data.{{ hh_mocap:capture11.png?65 |}} Using this equation, you can get velocity data of x,y,z. This is time dependent acceleration.
-Once you get the x,y,z velocity data,
-v = √((xi)^2) + ((yi)^2) + ((zi)^2)
-exploit this equation to get velocity of rigid body.
-This is the position profile by exported raw data using "matlab"
-{{ hh_mocap:position.jpg?300 |}}
-This is the velocity profile by exported raw data using "matlab"
-{{ hh_mocap:velocity.jpg?300 |}}