ARE 2011 AR Authoring

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Presentation by Mark Billinghurst at the ARE 2011 conference about Augmented Reality authoring tools

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ARE 2011 AR Authoring

  1. 1. AR Authoring Tools Mark Billinghurst HIT Lab NZUniversity of Canterbury
  2. 2. 1998 - My First AR Application  custom tracking  ~6,000+ lines C-code  libVRML rendering  no interaction  2 months programming
  3. 3. static void init( void ){! "int i;! "ARParam wparam;! Initializing the AR Application /* open the video path */! if( arVideoOpen( vconf ) < 0 ) exit(0);! /* find the size of the window */! if( arVideoInqSize(&xsize, &ysize) < 0 ) exit(0);! printf("Image size (x,y) = (%d,%d)n", xsize, ysize);! /* set the initial camera parameters */! if( arParamLoad(cparam_name, 1, &wparam) < 0 ) exit(0);! arParamChangeSize( &wparam, xsize, ysize, &cparam );! arInitCparam( &cparam );! printf("*** Camera Parameter ***n");! arParamDisp( &cparam );! /* open the graphics window */! argInit( &cparam, 2.0, 0, 0, 0, 0 );! /* load in the object data - trained markers and associated bitmap files */! if( (object=read_VRMLdata(model_name, &objectnum)) == NULL ) exit(0);! printf("Objectfile num = %dn", objectnum);! /* test render all the VRML objects */! glEnable(GL_TEXTURE_2D);! for ( i = 0; i < objectnum; i++ )! " arVrml97Draw( object[i].vrml_id );! glDisable(GL_TEXTURE_2D);! /* initialize lights */! init_lights(); !}!
  4. 4. ARToolKit  Open source – computer vision based AR tracking
  5. 5. ARToolKit in the World  Hundreds of projects  Large research community
  6. 6. AR Application Libraries AR ApplicationVideo Cap Models UI Events Tracking GraphicsCamera SDK
  7. 7. Low Level AR Libraries  Tracking   ARToolKit, ARToolKitPlus, ARTag, SSTT, etc  Rendering   OpenGL, DirectX, OpenGL ES, etc  Model Loading   libVRML, lib3DS, etc  Audio, Networking, etc
  8. 8. High Level AR Authoring  Software Libraries   OSGART, Studierstube, MXRToolKit  Plugin to existing software   mARx, Experient Creator, Unity3D, etc  Stand Alone   AMIRE, BuildAR, etc  Next Generation   iaTAR (Tangible AR)
  9. 9. OSGART Programming Library  www.osgart.org  Integration of ARToolKit with a High-Level Rendering Engine (OpenSceneGraph) OSGART= OpenSceneGraph + ARToolKit  Supporting Geometric + Photometric Registration
  10. 10. osgART:Features  C++ (but also Python, Lua, etc).  Multiple Video Input supports:   Direct (Firewire/USB Camera), Files, Network by ARvideo, PtGrey, CVCam, VideoWrapper, etc.  Benefits of Open Scene Graph   Rendering Engine, Plug-ins, etc
  11. 11. mARx Plug-in  3D Studio Max Plug-in  Can model and view AR content at the same time
  12. 12. BuildAR  http://www.buildar.co.nz/  Stand alone application  Visual interface for AR model viewing application  Enables non-programmers to build AR scenes
  13. 13. AR Markerless Tracking  OPIRA Library   Uses natural features for tracking   Fast, robust performance
  14. 14. BuildAR Pro 2  Markerless tracking  Video, audio, text objects
  15. 15. Esperient Creator AR Plug-in  Esperient Creator – www.esperient.com   Authoring interactive 3D applications  Key features   Model loading   Scripting   Publishing   Animation  Plug-in library
  16. 16. Creator AR  ARToolKit Plugin  Adding AR interactivity
  17. 17. Advanced Authoring: iaTAR  Immersive AR Authoring – authoring from within AR  Using real objects to create AR applications
  18. 18. User Study  Pilot User study   AR Workshop   24 subjects (16M/8F)   Age: 9-50   IA vs Desktop tool   Task: placing objects   Observation -  Task completion time -  Error count -  Users’ Preference ▲ CATOMIR authoring tool
  19. 19. User Study  Results   Task completion time -  IA : =3:53, =2.24 -  Desktop : =5:05, =2.97 -  IA turned out 25% faster •  t(23)=2.84, p=0.00094   Error counts -  IA : 21 (fatal:0) -  Desktop : 36 (fatal:21)   Users’ Preference -  IA : 42% (10) -  Mixed : 33% (8) -  Desktop : 25% (6)
  20. 20. Conclusions  Need to move beyond low-level AR SDKs   Stand alone applications -  BuildAR – simple scene assembly   Plug-in Software -  mARx – modeling plug-in -  Creator AR – interactive plug-in   High level SDKs -  osgART – C++/scripting library  Research opportunities in Immersive AR Authoring
  21. 21. More Information•  Mark Billinghurst –  mark.billinghurst@hitlabnz.org•  Websites –  http://www.hitlabnz.org/ –  http://artoolkit.sourceforge.net/ –  http://www.osgart.org/ –  http://www.buildar.co.nz/

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