logging in or signing up Stereoscopy for Non-Planar Projections autopilot Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 306 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: August 31, 2009 This Presentation is Public Favorites: 0 Presentation Description Stereoscopy is an emerging field in cinematography and gaming. In the field of interactive rendering on consumer hardware both, stereo rendering of standard projections and monoscopic rendering of non-planar single-center projections, such as cylindrical and spherical projections, are well known. Interactive stereo rendering of non-planar projections, though, is still a challenge. This talk sketches the adaptation of two existing monoscopic rendering techniques to stereo rendering. Comments Posting comment... By: SWAJITH7363 (6 month(s) ago) hii i want to download it Saving..... Post Reply Close Saving..... Edit Comment Close By: swatimishrastream (12 month(s) ago) i want to download this presentation please help me because it is necessary for my seminar presentation........please reply Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Enhancing Interactive Non-Planar Projections of 3D Geovirtual Environments with Stereoscopic Imaging : Enhancing Interactive Non-Planar Projections of 3D Geovirtual Environments with Stereoscopic Imaging Matthias Trapp, Haik Lorenz, Markus Jobst, Jürgen Döllner Hasso-Plattner-Institute at the University of Potsdam True-3D in Cartography 1st International Conference on 3D MapsAugust 24 - 28, 2009 Dresden, Germany 1 motivation : motivation geo-media technology provides interactivity, immersion facilitates the communication of 3D geo spatial data applications to cartography: increase immersion into 3D geovirtual environments support for depth-cues planar stereoscopy: well understood – rendering: straight forward supported by graphics hardware / driver non-planar stereoscopy: provides high field-of-view and image resolution 2 problem: non-planar projection surfaces : problem: non-planar projection surfaces rendering of digital 3D city and landscape models: high amount of geometry and texture data real-time constraints (> 20 frames per second) current generation of graphics hardware (GPU) no native support for non-planar projection surfaces requires specific rendering techniques classified into image, geometry, and ray-based approaches hardware-accelerated stereoscopic imaging: available stereo hardware modifies vertex pipeline stage cannot be used for rendering non-planar stereoscopy 3 framework - conceptual overview : framework - conceptual overview 4 review: image-based approach (IBA) : review: image-based approach (IBA) basic concept: dynamic cube map + screen-aligned quad image warping based on normal vectors: 3-phase rendering process: create/update dynamic cubemap setup projection shader render screen-aligned quad 5 adapting IBA for stereoscopy : adapting IBA for stereoscopy basic idea for image-based non-planar projections: create cubemaps for each virtual camera derive non-planar projection for each cube-map examplary workflow for two stereo mates: 6 review: geometry-based approach (GBA) : review: geometry-based approach (GBA) projection computed on a per-vertex basis ensure sufficient on-screen vertex density dynamic mesh refinement required 7 adapting GBA for stereoscopy : adapting GBA for stereoscopy straight forward approach: setup piece-wise projection for each virtual camera render into different color-buffers additional post-processing step: layer compositing example for stereo image pairs: 8 rendering active & passive stereo : rendering active & passive stereo active stereo: using quad-buffering usually encapsulated by graphics driver passive stereo: anaglyph: color-buffer compositing polarized: render to framebuffer chromo-depth stereo: apply directly during rendering 9 rendering passive anaglyph - results : rendering passive anaglyph - results HITIT 10 rendering chromo-stereoscopy : rendering chromo-stereoscopy no need for generating stereo image pair color as a function of depth 11 rendering chromo-stereoscopy - results : rendering chromo-stereoscopy - results HITIT 12 applying chromo-stereoscopy : applying chromo-stereoscopy GBA: straight forward application to fragment‘s depth IBA: needs depth correction 13 rendering chromo-stereoscopy - results : rendering chromo-stereoscopy - results HITIT 14 chroma-stereoscopy issues : chroma-stereoscopy issues common problems for IBA and GBA: distribution of color can decrease stereo effect perception: facade information (texture) is altered interaction: focal plane must be adapted 15 binary comparision GBA vs. IBA : binary comparision GBA vs. IBA 16 conclusions & future work : conclusions & future work conclusions: interactive stereoscopic rendering for non-planar projections increases immersion, thus psychological depth cues performance limited by geometric complexity of the scene GBA outperforms IBA but IBA much easier to implement/use open problem: omni-directional stereo without image artifacts future work: auto stereoscopy for non-planar projections surfaces eye tracking to adjust user‘s focal plane 17 Thank you for your attention! Questions? : Thank you for your attention! Questions? Contact Matthias Trapp matthias.trapp@hpi.uni-potsdam.de Haik Lorenzhaik-lorenz@hpi.uni-potsdam.de Markus Jobst office@jobstmedia.at Jürgen Döllner juergen.doellner@hpi.uni-potsdam.de Workgroup 3D Geoinformation www.3dgi.de/ Computergraphics System Group www.hpi.uni-potsdam.de/doellner/ 18 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Stereoscopy for Non-Planar Projections autopilot Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 306 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: August 31, 2009 This Presentation is Public Favorites: 0 Presentation Description Stereoscopy is an emerging field in cinematography and gaming. In the field of interactive rendering on consumer hardware both, stereo rendering of standard projections and monoscopic rendering of non-planar single-center projections, such as cylindrical and spherical projections, are well known. Interactive stereo rendering of non-planar projections, though, is still a challenge. This talk sketches the adaptation of two existing monoscopic rendering techniques to stereo rendering. Comments Posting comment... By: SWAJITH7363 (6 month(s) ago) hii i want to download it Saving..... Post Reply Close Saving..... Edit Comment Close By: swatimishrastream (12 month(s) ago) i want to download this presentation please help me because it is necessary for my seminar presentation........please reply Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Enhancing Interactive Non-Planar Projections of 3D Geovirtual Environments with Stereoscopic Imaging : Enhancing Interactive Non-Planar Projections of 3D Geovirtual Environments with Stereoscopic Imaging Matthias Trapp, Haik Lorenz, Markus Jobst, Jürgen Döllner Hasso-Plattner-Institute at the University of Potsdam True-3D in Cartography 1st International Conference on 3D MapsAugust 24 - 28, 2009 Dresden, Germany 1 motivation : motivation geo-media technology provides interactivity, immersion facilitates the communication of 3D geo spatial data applications to cartography: increase immersion into 3D geovirtual environments support for depth-cues planar stereoscopy: well understood – rendering: straight forward supported by graphics hardware / driver non-planar stereoscopy: provides high field-of-view and image resolution 2 problem: non-planar projection surfaces : problem: non-planar projection surfaces rendering of digital 3D city and landscape models: high amount of geometry and texture data real-time constraints (> 20 frames per second) current generation of graphics hardware (GPU) no native support for non-planar projection surfaces requires specific rendering techniques classified into image, geometry, and ray-based approaches hardware-accelerated stereoscopic imaging: available stereo hardware modifies vertex pipeline stage cannot be used for rendering non-planar stereoscopy 3 framework - conceptual overview : framework - conceptual overview 4 review: image-based approach (IBA) : review: image-based approach (IBA) basic concept: dynamic cube map + screen-aligned quad image warping based on normal vectors: 3-phase rendering process: create/update dynamic cubemap setup projection shader render screen-aligned quad 5 adapting IBA for stereoscopy : adapting IBA for stereoscopy basic idea for image-based non-planar projections: create cubemaps for each virtual camera derive non-planar projection for each cube-map examplary workflow for two stereo mates: 6 review: geometry-based approach (GBA) : review: geometry-based approach (GBA) projection computed on a per-vertex basis ensure sufficient on-screen vertex density dynamic mesh refinement required 7 adapting GBA for stereoscopy : adapting GBA for stereoscopy straight forward approach: setup piece-wise projection for each virtual camera render into different color-buffers additional post-processing step: layer compositing example for stereo image pairs: 8 rendering active & passive stereo : rendering active & passive stereo active stereo: using quad-buffering usually encapsulated by graphics driver passive stereo: anaglyph: color-buffer compositing polarized: render to framebuffer chromo-depth stereo: apply directly during rendering 9 rendering passive anaglyph - results : rendering passive anaglyph - results HITIT 10 rendering chromo-stereoscopy : rendering chromo-stereoscopy no need for generating stereo image pair color as a function of depth 11 rendering chromo-stereoscopy - results : rendering chromo-stereoscopy - results HITIT 12 applying chromo-stereoscopy : applying chromo-stereoscopy GBA: straight forward application to fragment‘s depth IBA: needs depth correction 13 rendering chromo-stereoscopy - results : rendering chromo-stereoscopy - results HITIT 14 chroma-stereoscopy issues : chroma-stereoscopy issues common problems for IBA and GBA: distribution of color can decrease stereo effect perception: facade information (texture) is altered interaction: focal plane must be adapted 15 binary comparision GBA vs. IBA : binary comparision GBA vs. IBA 16 conclusions & future work : conclusions & future work conclusions: interactive stereoscopic rendering for non-planar projections increases immersion, thus psychological depth cues performance limited by geometric complexity of the scene GBA outperforms IBA but IBA much easier to implement/use open problem: omni-directional stereo without image artifacts future work: auto stereoscopy for non-planar projections surfaces eye tracking to adjust user‘s focal plane 17 Thank you for your attention! Questions? : Thank you for your attention! Questions? Contact Matthias Trapp matthias.trapp@hpi.uni-potsdam.de Haik Lorenzhaik-lorenz@hpi.uni-potsdam.de Markus Jobst office@jobstmedia.at Jürgen Döllner juergen.doellner@hpi.uni-potsdam.de Workgroup 3D Geoinformation www.3dgi.de/ Computergraphics System Group www.hpi.uni-potsdam.de/doellner/ 18