Animations

Mastering Perspective Projection through Parallelly Projected Slabs for Virtual Endoscopy

This page assembles some animations results of work that is part of our research topic ``Visualization of Medical Data''. The figures are provided in GIF or JPG format and the movies are MPEG1 compressed (mpg).

The movies frame rate do not correspond with the real frame rates.

Virtual endoscopy through a CT trachea data set. Comparison between constant slabs thickness and incremental slab thickness.

Movie 1 : Left Outside view showing the camera position within the trachea. Middle Projected-slabs algorithm with incremental slab thickness. (37 slabs). Right Projected-slabs algorithm with constant slab thickness. (162 slabs).

Progressive Rendering

Movie 3 : Front to back progressive rendering.	Movie 4 : Back to front progressive rendering.

Visualization of a trachea data set changing the trachea walls transparency to localize the pulmonary artery, the aorta together with other vessels.

Movie 5 : CT trachea data set rendered changing the trachea walls transparency progressively.	Figure 1 : Outside view showing the camera position within the trachea.

Comparison of the projected-slabs algorithm with brute force approach

Movie 6 : Top left Outside view showing the position of the camera. Bottom right Brute force ray-casting rendering. Top right Projected-slabs algorithm using a low error tolerance. Bottom left Projected-slabs algorithm using a higher error tolerance. It illustrates the artifacts that appear due to the projected-slabs algorithm approximations. It is due to the fact that the error tolerance is too high for the colon walls thickness.

This page was last updated by Anna Vilanova on April 30, 2000.
If you have any comments, please send a message to anna@cg.tuwien.ac.at.