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Graphics and Visualization

Liz Marai SENQ 5423. Graphics and Visualization. Computer Graphics. Computer graphics generally means creation, storage and manipulation of models and images

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Graphics and Visualization

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  1. Liz Marai SENQ 5423 Graphics and Visualization

  2. Computer Graphics • Computer graphics generally means creation, storage and manipulation of models and images • Such models come from diverse and expanding set of fields including physical, mathematical, artistic, biological, and even conceptual (abstract) structures Frame from animation by William Latham, shown at SIGGRAPH 1992. Latham uses rules that govern patterns of natural forms to create his artwork.

  3. Simulating the Air Flow around a Bat Wing

  4. Visualization • branch of computer graphics that is concerned with presenting data to users, by means of images, with the goal of improving understanding of the data being presented. • relatively new field (1983) • draws people w/ an interest in: • computer graphics/computer vision, medical imaging,… • data mining, cognition science,… • application-specific sw systems,…

  5. Scientific and Information Visualization visualization of an extremely large simulation of the instability caused by two mixing fluidshttp://www.llnl.gov visualization of human development http://tools.google.com/gapminder/

  6. Modeling anatomical joints insight Computational & analysis tools models simulations data (medical measurements)

  7. Impact • Help plan surgical interventions and therapy • High-performance robots and implants • More realistic computer animations [Tony de Rose, Pixar]

  8. Tracking motion: idea extract bone outline from one volume image (CT scan) track outline through sequence of volume images (1990) (not too many sample poses – radiation concerns)

  9. Computational modeling: joint-spacing and cartilage (Marai et al, EMBC'06) Idea: cartilage correlates with bone proximity parameter: p the proximity threshold

  10. Cartilage maps: location results Scaphoid bone 7 poses @ 2mm p Bone in blue, cartilage in tan

  11. Applications:Push-up DRUJ malunion

  12. The push-up debate (Alexis vs. Crystal) • on your knuckles or not?

  13. The push-up debate (Crystal wins) • CT volume images of one individual • 7 different poses (knuckle-pose included) • computed cartilage contact & ligament lengthening in each pose • ~48 hrs, single processor • knuckle pose yields maximum contact

  14. The push-up debate: knuckle-walkers

  15. Applications:Push-up DRUJ malunion

  16. DRUJ malunion Distal radioulnar joint (DRUJ)

  17. DRUJ malunion(Crisco et al, JOR’07)

  18. Contact • http://vis.cs.pitt.edu • marai@cs.pitt.edu • SENQ 5423

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