DE Conferentie 2004 Julien Noel


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DE Conferentie 2004 Julien Noel

  1. 1. 3D volume digitization and visualization DIGISENS S.A. BP 278 Savoie Technolac 73375 Le Bourget-du-Lac Cedex-France Tel :+33(0)4 79 65 89 16 email : Applications in Cultural Heritage Julien NOEL
  2. 2. DIGISENS S.A. BP 278 Savoie Technolac 73375 Le Bourget-du-Lac Cedex-France Tel :+33(0)4 79 65 89 16 email : DIGISENS Software development for microCT and CT applications : - Calibration software - 3D Reconstruction software - 3D Volume and surface rendering / analysis software 3D CT and microCT solution provider for : - industries - universities - museum’s laboratories Winner of the European IST Prize (Information Society Technology) : www. ist First prize of the 2004 SITEM Innovation Award (International Show of Museographical and Heritage-oriented Technology)
  3. 3. 3D Micro Computed Tomography Principle Acquisition Reconstruction Visualization
  4. 4. 3D Micro-CT (Micro Computed Tomography) is a non destructive X-ray technique for internal expertise and volume digitization. Definition <ul><li>Advantages : </li></ul><ul><ul><li>Volume digitization (volumical data) </li></ul></ul><ul><ul><li>Complete digitization of entire objet, without shaded zone </li></ul></ul><ul><ul><li>Compatible with all material, even black, brillant and transparent surfaces </li></ul></ul><ul><ul><li>Non deteriorative scanning </li></ul></ul><ul><ul><li>High precision (0,005 mm) </li></ul></ul><ul><ul><li>Fast digitizing (1 hour / object) </li></ul></ul><ul><ul><li>Density segmentation </li></ul></ul><ul><ul><li>Real time visualisation </li></ul></ul><ul><li>Drawbacks : </li></ul><ul><li>Size limitation </li></ul><ul><li>No color </li></ul>
  5. 5. 3-D Computed Tomography X-Ray technology Digital detector microCT : Microfocus X-Ray tube
  6. 6. Principle
  7. 7. 360 digital radiographs Cone-Beam reconstruction Volume rendering (voxels)
  8. 8. Radiography X Tomography X 2D slice 3D rendering Tomography X
  9. 9. <ul><li>Back projection x =   A  -1 b </li></ul><ul><li>Computed Tomography reconstruction </li></ul>2 4 8 16 36 90
  10. 10. <ul><li>e.g Ramp filter </li></ul><ul><li>Filtered Back Projection </li></ul>
  11. 11. 3D digitization and visualisation using microCT, for Museums & Research Centers applications Some examples of 3D digitization with 3D CT technology and volume rendering software
  12. 12. Surface scanning Structured light Laser scanning Multi-spectral <ul><li>Drawbacks : </li></ul><ul><li>No internal information </li></ul><ul><li>Slow process </li></ul><ul><li>Low details </li></ul><ul><li>Shaded zones </li></ul><ul><li>Can’t work with black, bright or transparent surface </li></ul>
  13. 13. Human skulls with 3D CT scanning
  14. 14. Human skull
  15. 15. Closed wooden box : how to discover internal and invisible objects
  16. 16. Real Picture 3D rendering (possibility to apply mapping textures) Grenoble Museum’s collection African sculpted box. MHNGr.1979.633
  17. 17. African sculpted box. MHNGr.1979.633 The internal view with transparency of the wood reveals shellfishes, plants and grains. In fact it seems to be a shellfish necklace. Shellfish virtual extraction by selection of an expected range of density. 3D virtual cross-section to discover the inner objects Grenoble Museum’s collection
  18. 18. Talisman : discover all about mysterious objects
  19. 19. Lyon Museum’s collection Talisman from Madagascar External volumical view of an african talisman Segmentation of high density components : 3D view of the hook and dicovery of a pearl. 2D high resolution CT slices of the pearl and the hook
  20. 20. Talisman from Madagascar Lyon Museum’s collection 3D surface rendering of the hook and the pearl : detailed views and transparent rendering
  21. 21. Paleolagus Fossil : how to virtually extract bone from stone
  22. 22. Grenoble Museum’s Collection Paleolagus haydeni, Wyoming (USA), oligocène. Digitalization and 3D volume rendering of a 35 million years fossil. The aim of microCT scanning is here to study the skull by virtually removing the stone.
  23. 23. Paleolagus haydeni, Wyoming (USA), oligocène. Grenoble Museum’s Collection Virtual extraction of the bone and real time 3D visualization
  24. 24. Hornet Very high resolution digitalization applied to insects – internal 3D anatomy analysis.
  25. 27. Rodent : classification of the animal by studying internal teeth
  26. 28. 3D real time cross sections of the teeth to determine the specie Grenoble Museum’s collection After comparison with literature schemes, we can classify the specie : this rodent is an Arvicola terrestris
  27. 29. Ostracod fossil Real size 2mm Rabbit’s bone Junon – Le Louvre
  28. 30. Computed Tomography of a small clay pompeian head CT of a cat shaped coffin CT and reconstruction made by University of Bologna, Physics department A cat mummy exposed at the Egyptian section of the City Museum of Bologna It is possible to see the rest of a cat skeleton without opening the coffin.
  29. 31. Human Mandible and teeth
  30. 32. VisioFURL <ul><li>3D volumical visualization & media for : </li></ul><ul><li>Museum Exhibitions </li></ul><ul><li>Pedagogical courses </li></ul><ul><li>Libraries & Database </li></ul>
  31. 33. Integration of 3D models into an interactive interface for presentation (exposition) and pedagogy. VisioFurl
  32. 35. Research (internal discoveries, fabrication process analysis, species determination …) Conservative / restorative applications (classification, volume digitalisation of cultural heritage, conservation, restorative applications …) Exposition (popularisation, demonstration, 3D libraries and database …) Museums & Research Centers applications
  33. 36. <ul><li>How to implement 3D Computed Tomography digitization in Museums, Research laboratories, Universities, or Industries: </li></ul><ul><li>Install complete CT and/or microCT equipment with software for scientific analysis (volume rendering) and real time 3-d visualisation (surface/volume rendering) </li></ul><ul><li>Rent a CT/µCT equipment for weeks or months in situ </li></ul><ul><li>Upgrade any radiographic equipment for 3D CT capabilities </li></ul>
  34. 37. Julien NOEL DIGISENS S.A. 12 allée du Lac de Garde BP 278 - Savoie Technolac 73375 Le Bourget du Lac Cedex Tel : +33 (0)4 79 65 89 16 Mobile : 33 (0)6 86 61 55 13 e-mail : DIGISENS S.A. BP 278 Savoie Technolac 73375 Le Bourget-du-Lac Cedex-France Tel :+33(0)4 79 65 89 16 email : Thanks for your attention