Movement Capture - Revision history

Diegom: /* Are you going to be tracking very small movements? */

2011-12-23T13:39:44Z

‎Are you going to be tracking very small movements?

Diegom: /* Are you going to be tracking very small movements? */

2011-12-23T13:38:44Z

‎Are you going to be tracking very small movements?

Diegom: /* Is the entire body going to be moving through a large volume of space (greater than about 5 feet by 5 feet) (e.g., walking, running, many forms of dancing) or will the body stay more or less in one spot (within a space of about 5 feet by 5 feet)?

2011-12-23T13:08:12Z

/* Is the entire body going to be moving through a large volume of space (greater than about 5 feet by 5 feet) (e.g., walking, running, many forms of dancing) or will the body stay more or less in one spot (within a space of about 5 feet by 5 feet)?

Diegom: removed references

2011-12-23T12:24:30Z

removed references

Diegom: /* What kind of movement do you need to capture? */

2011-12-23T12:09:31Z

‎What kind of movement do you need to capture?

Diegom at 12:07, 23 December 2011

2011-12-23T12:07:57Z

Diegom at 12:07, 23 December 2011

2011-12-23T12:07:37Z

Diegom: /* Do you need to process the movement data in real-time? */

2011-12-23T11:50:12Z

‎Do you need to process the movement data in real-time?

Diegom: /* What kind of movement do you need to capture? */

2011-12-23T11:49:46Z

‎What kind of movement do you need to capture?

Diegom: /* Are you capturing movements of the entire body or only some body parts (only finger gestures, or only full arm movements, or only the torso, or only leg bending and swinging)? Do you need to track both large movements (e.g., lunging, jumping, turn

2011-12-23T11:48:51Z

/* Are you capturing movements of the entire body or only some body parts (only finger gestures, or only full arm movements, or only the torso, or only leg bending and swinging)? Do you need to track both large movements (e.g., lunging, jumping, turn

@@ Line 62: / Line 62: @@
 === Are you going to be tracking very small movements? ===
-See the section on [[Kinect#Spatial_resolution_errors spatial resolution errors for the Kinect]] to learn about considerations you need to take into account if you intend to track small movements.<br />
+See the section on [[Kinect#Spatial_resolution_errors| spatial resolution errors for the Kinect]] to learn about considerations you need to take into account if you intend to track small movements.<br />
 </div>

@@ Line 62: / Line 62: @@
 === Are you going to be tracking very small movements? ===
-See the section on [http://wiki.iat.sfu.ca/BlackBox/index.php/Kinect#Errors_in_using_the_Kinect_for_motion_tracking Errors and limits in using the Kinect for motion tracking] to learn about considerations you need to take into account if you intend to track small movements.<br />
+See the section on [[Kinect#Spatial_resolution_errors spatial resolution errors for the Kinect]] to learn about considerations you need to take into account if you intend to track small movements.<br />
 </div>

@@ Line 35: / Line 35: @@
 In his seminal book on acting, ''An Acrobat of the Heart'', theater theorist and director Jerzy Grotowski distinguishes the two kinds of movements as ''plastiques'' and ''corporeals''. If you are tracking movement that happens on similar scales (either mostly plastiques or mostly corporeals) and for body parts that close to each other, then you can use the Kinect effectively by using the appropriate Kinect API.Otherwise, you are better off using the Vicon.
-===Is the entire body going to be moving through a large volume of space (greater than about 5 feet by 5 feet) (e.g., walking, running, many forms of dancing) or will the body stay more or less in one spot (within a space of about 5 feet by 5 feet)? ===
+===Is the entire body going to be moving through a large volume of space (greater than about 5 feet by 5 feet) (e.g., walking, running, many forms of dancing)? ===
-If so, then you must use the Vicon.
+If so, then you must use the Vicon. Otherwise, if the body will within a space of about 5 feet by 5 feet, you might be able to stick with the Kinect.
 === Are you going to be tracking movement in the transverse plane of the body? ===

← Older revision		Revision as of 12:24, 23 December 2011
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	The current Vicon setup in the Blackbox prevents you from using it for real-time motion capture. A kludge was devised a long time ago by a former SIAT student, Rob Lovell, but the technical details on how to do this has been lost. Plans for upgrading the Vicon system are underway. In the meantime, the Kinect will allow you to stream real-time movement data very easily.		The current Vicon setup in the Blackbox prevents you from using it for real-time motion capture. A kludge was devised a long time ago by a former SIAT student, Rob Lovell, but the technical details on how to do this has been lost. Plans for upgrading the Vicon system are underway. In the meantime, the Kinect will allow you to stream real-time movement data very easily.
−
−	~~= References =~~
−
−	* Karantonis, D. M., Narayanan, M. R., Mathie, M., Lovell, N. H., & Celler, B. G. (2006). Implementation of a real-time human movement classifier using a triaxial accelerometer for ambulatory monitoring. Information Technology in Biomedicine, IEEE Transactions on, 10(1), 156–167.
−	* Mathie, M. J., Celler, B. G., Lovell, N. H., & Coster, A. C. F. (2004). Classification of basic daily movements using a triaxial accelerometer. Medical & Biological Engineering & Computing, 42(5), 679-687. doi:10.1007/BF02347551
−	* Morency, L. P., Quattoni, A., & Darrell, T. (2007). Latent-dynamic discriminative models for continuous gesture recognition. 2007 IEEE Conference on Computer Vision and Pattern Recognition (pp. 1–8).
−	* Sekine, M., Tamura, T., Togawa, T., & Fukui, Y. (2000). Classification of waist-acceleration signals in a continuous walking record. Medical Engineering & Physics, 22(4), 285-291. doi:16/S1350-4533(00)00041-2
−	* Taylor, G. W., & Hinton, G. E. (2009). Factored conditional restricted boltzmann machines for modeling motion style. Proceedings of the 26th annual international conference on machine learning (pp. 1025–1032).
−	* Yang, C. C., & Hsu, Y. L. (2010). A review of accelerometry-based wearable motion detectors for physical activity monitoring. Sensors, 10(8), 7772–7788.

@@ Line 26: / Line 26: @@
 What kind of movement do you need to capture? Consider the following.
-''' Do you need to identify individual body parts or is it sufficient to treat the body as a blob? '''
+<div style = "background-color: #ddd; padding: 10px">
 If all you need to do is treat the body as a blob (for example, tracking the position of a body in space in order to project an image around that body), the Kinect is a more convenient choice than the Vicon. Recognizing human skeleton data using the Vicon data takes more work than processing Kinect data. While many of the Kinect APIs map the cloud of points to a human skeleton, for the Vicon, you will need to set up the skeleton yourself.
-''' Are you capturing movements of the ''entire body'' or only ''some body parts'' (only finger gestures, or only full arm movements, or only the torso, or only leg bending and swinging)? Do you need to track both large movements (e.g., lunging, jumping, turning around) ''and'' small gestures (e.g., foot tapping, fingers drumming, head slightly tilting)? '''
+=== Are you capturing movements of the ''entire body'' or only ''some body parts'' (only finger gestures, or only full arm movements, or only the torso, or only leg bending and swinging)? Do you need to track both large movements (e.g., lunging, jumping, turning around) ''and'' small gestures (e.g., foot tapping, fingers drumming, head slightly tilting)? ===
 In his seminal book on acting, ''An Acrobat of the Heart'', theater theorist and director Jerzy Grotowski distinguishes the two kinds of movements as ''plastiques'' and ''corporeals''. If you are tracking movement that happens on similar scales (either mostly plastiques or mostly corporeals) and for body parts that close to each other, then you can use the Kinect effectively by using the appropriate Kinect API.Otherwise, you are better off using the Vicon.
-'''Is the entire body going to be moving through a large volume of space (greater than about 5 feet by 5 feet) (e.g., walking, running, many forms of dancing) or will the body stay more or less in one spot (within a space of about 5 feet by 5 feet)? '''
+===Is the entire body going to be moving through a large volume of space (greater than about 5 feet by 5 feet) (e.g., walking, running, many forms of dancing) or will the body stay more or less in one spot (within a space of about 5 feet by 5 feet)? ===
 If so, then you must use the Vicon.
-''' Are you going to be tracking movement in the transverse plane of the body? '''
+=== Are you going to be tracking movement in the transverse plane of the body? ===
 These movements include...
@@ Line 49: / Line 49: @@
 These movements ''cannot'' be tracked by the Kinect APIs available. You will have to search for APIs that do this, or build it yourself using the cloud point data. The Vicon is a better choice for this task.
-''' Do you need to track movements of the separate parts of the torso (the cervical, lumbar, thoracic, and sacral areas)? '''
+=== Do you need to track movements of the separate parts of the torso (the cervical, lumbar, thoracic, and sacral areas)? ===
 These movements ''cannot'' be tracked by the Kinect APIs available. You will have to search for APIs that do this, or build it yourself using the cloud point data. The Vicon is a better choice for this task. If you don't need to track precise movements of the parts of the torso, the Kinect is fine.<br /><br />
-'''Will the mover be changing their frontal orientation (e.g., by turning around or spinning)?'''
+===Will the mover be changing their frontal orientation (e.g., by turning around or spinning)?===
 <br /> The change in front ''cannot'' be automatically tracked by the Kinect APIs available. You will have to search for APIs that do this, or build it yourself using the cloud point data. The Vicon is a better choice for this task.<br />
-''' Are you going to be tracking very fast movements? '''
+=== Are you going to be tracking very fast movements? ===
 The sampling rate of the Vicon is 200 Hz, which is sufficiently large to capture many nuances of human movement. The Kinect's, however, is (as most) 30 Hz. Is this fast enough? The answer is: in many instances, yes, but it really depends on what you want to do. See the section on [http://wiki.iat.sfu.ca/BlackBox/index.php/Kinect#Errors_in_using_the_Kinect_for_motion_tracking Errors and limits in using the Kinect for motion tracking].
-''' Are you going to be tracking very small movements? '''
+=== Are you going to be tracking very small movements? ===
 See the section on [http://wiki.iat.sfu.ca/BlackBox/index.php/Kinect#Errors_in_using_the_Kinect_for_motion_tracking Errors and limits in using the Kinect for motion tracking] to learn about considerations you need to take into account if you intend to track small movements.<br />
 == How much time do you have to plan and set up your motion capture session? ==

← Older revision		Revision as of 12:07, 23 December 2011
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−	= Introduction =	+	= Introduction =
	There are currently two major systems for movement capture and recognition in the Blackbox: The Vicon system and the Kinect. There are also a set of accelerometers that you can use:		There are currently two major systems for movement capture and recognition in the Blackbox: The Vicon system and the Kinect. There are also a set of accelerometers that you can use:

← Older revision		Revision as of 11:50, 23 December 2011
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	The current Vicon setup in the Blackbox prevents you from using it for real-time motion capture. A kludge was devised a long time ago by a former SIAT student, Rob Lovell, but the technical details on how to do this has been lost. Plans for upgrading the Vicon system are underway. In the meantime, the Kinect will allow you to stream real-time movement data very easily.		The current Vicon setup in the Blackbox prevents you from using it for real-time motion capture. A kludge was devised a long time ago by a former SIAT student, Rob Lovell, but the technical details on how to do this has been lost. Plans for upgrading the Vicon system are underway. In the meantime, the Kinect will allow you to stream real-time movement data very easily.
−
−	~~</div>~~

	= References =		= References =

← Older revision		Revision as of 11:49, 23 December 2011
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	See the section on [http://wiki.iat.sfu.ca/BlackBox/index.php/Kinect#Errors_in_using_the_Kinect_for_motion_tracking Errors and limits in using the Kinect for motion tracking] to learn about considerations you need to take into account if you intend to track small movements.<br />		See the section on [http://wiki.iat.sfu.ca/BlackBox/index.php/Kinect#Errors_in_using_the_Kinect_for_motion_tracking Errors and limits in using the Kinect for motion tracking] to learn about considerations you need to take into account if you intend to track small movements.<br />
		+
	</div>		</div>

@@ Line 34: / Line 34: @@
 === Are you capturing movements of the '''entire body''' or only '''some body parts''' (only finger gestures, or only full arm movements, or only the torso, or only leg bending and swinging)? Do you need to track both large movements (e.g., lunging, jumping, turning around) <span>'''and'''</span> small gestures (e.g., foot tapping, fingers drumming, head slightly tilting)? ===
-In his seminal book on acting, <span>''An Acrobat of the Heart''</span>, theater theorist and director Jerzy Grotowski distinguishes the two kinds of movements as <span>''plastiques''</span> and <span>''corporeals''</span>. If you are tracking movement that happens on similar scales (either mostly plastiques or mostly corporeals) and for body parts that close to each other, then you can use the Kinect effectively by using the appropriate Kinect API.Otherwise, you are better off using the Vicon. <br /><br /><span>'''Is the entire body going to be moving through a large volume of space (greater than about 5 feet by 5 feet) (e.g., walking, running, many forms of dancing) or will the body stay more or less in one spot (within a space of about 5 feet by 5 feet)? '''</span><br /><br /> If so, then you must use the Vicon. <br />
+In his seminal book on acting, <span>''An Acrobat of the Heart''</span>, theater theorist and director Jerzy Grotowski distinguishes the two kinds of movements as <span>''plastiques''</span> and <span>''corporeals''</span>. If you are tracking movement that happens on similar scales (either mostly plastiques or mostly corporeals) and for body parts that close to each other, then you can use the Kinect effectively by using the appropriate Kinect API.Otherwise, you are better off using the Vicon. <br /><br /><span>
 === Are you going to be tracking movement in the transverse plane of the body? ===