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Stereoscopic Analyzer On-Set Assistance System for 3D Capturing Frederik Zilly

Stereoscopic Analyzer On-Set Assistance System for 3D Capturing Frederik Zilly. The Product. With Touchscreen to see at NAB Show 09. Frederik Zilly. The Product. With Touchscreen to see at NAB Show 09. Frederik Zilly. Outline. Conventional Workflow in Stereo Production

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Stereoscopic Analyzer On-Set Assistance System for 3D Capturing Frederik Zilly

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  1. Stereoscopic Analyzer On-Set Assistance System for 3D Capturing Frederik Zilly

  2. The Product With Touchscreen to see at NAB Show 09 Frederik Zilly

  3. The Product With Touchscreen to see at NAB Show 09 Frederik Zilly

  4. Outline • Conventional Workflow in Stereo Production • The Vision: Automization of Stereo Workflow • Concept of Stereoscopic Analyzer (STAN) • Implementation Details • Applications Beyond Standard Stereo • Conclusions and Outlook Frederik Zilly

  5. Current Workflow of Stereo Production Viewfinder • Manual Adaptation of baseline to scene geometry: • Measure Distance of Near/Far Clipping Plane Mirror Rig Manual Stereo Post- Production Camera 1 Bad Stereo Good Stereo Camera 2 • Vertical disparities • Unmatched Colours • Lens Distortions • Rectified Stereo-Pairs • Matched Colors • Eye strain • Visual fatigue • Headache Frederik Zilly

  6. The Vision: Automization of Stereo Workflow • For Post-Production: supply Meta-Data for offline processing • For 3DTV: Apply corrections in Real-Time • Short Feedback Loop for manual and/or automatic reconfiguration Mirror Rig Realtime Optimization Of Stereo Parameters Camera 1 Bad Stereo Good Stereo Camera 2 Feedback Frederik Zilly

  7. 3DTV Post-Production Stereo Input Offline Correction Analyze Meta Data Control Update Playout Proxy Monitor 3D Viewfinder Zconv Frederik Zilly

  8. Live Stereo for 3DTV Stereo Input RT Correction Analyze Meta Data Control Update Monitor 3D Viewfinder Zconv Frederik Zilly

  9. Analyze Stereo Pair Control Correction • Baseline • Color: rough • Focus • Iris • Zoom • Rectification • Color: fine • Lens Distortion • Convergence Plane • Shift / Crop / Scale Monitor • Stereo Quality • Framing Alert • Vectorscope • Disparity Histogram Frederik Zilly

  10. Analyze: Fast GPU Feature Detector • Point correspondences: • Detect Feature Points • Estimate Fundamental Matrix F • Apply constraints induced by epipolar geometry to feature points Frederik Zilly

  11. Monitor: 3D Viewfinder Scene Points Disparity Histogram 1/30 Screen Width Frederik Zilly

  12. Monitor: Disparity Analysis Convergence Plane Near clipping plane warning Possible framing warning Frederik Zilly Zconv

  13. Correction of Geometrical Distortions • Correct Lens Distortions & Keystones in Real-Time • For RT-Preview or Live Transmission • Handle Meta-Data in Machine & Human Readable Format • Supply Proxy Driver for Post-Production and Playout Frederik Zilly

  14. 3D Viewfinder in Detail Left shifted Image Right shifted Image Disparity Range Zconv Actual Baseline Calc. Baseline Frederik Zilly GUI Design by KUK Film Production

  15. 3D Viewfinder continued Color Calibration Waveform Vectorscope Disparity Histogram Frederik Zilly Different View Modes

  16. Features under Development • Preview of Depth Information and Scene Depth Structure for Post-Production Purposes • Real-Time Depth Calculation for Live 3DTV Using Video-Plus-Depth Formats • Rectified Stereo enables efficient scanline search • Color Corrected Stereo helps SAD-based algorithms, improves coding efficiency • Known and/or controlled disparity range makes Depth Estimation faster and more robust • Enable Zoom • Needed for Live 3DTV, however introducing new challenges Frederik Zilly

  17. Beyond Stereo: Scenario for Multi Video + Depth Sat Cam 1 Mirror Rig Camera 1 Live Registration & Color Correction Realtime Depth-Estimation Camera 2 Sat Cam 2 Depth estimation more efficient for registered and color corrected data Live Multi-Video+Depth Broadcast Frederik Zilly

  18. Conclusions and Outlook • STAN: Camera Assistance System for 3D Production • Proof of Concept and Algorithmic Prototype • NAB‘09: First Presentation to Public • First Hardware Prototype Planned for NAB‘10 • Extensions under Development • RT Capture of Video-Plus-Depth • Application to Multi-View Stereo • Live Broadcast (incl. Zooming) Frederik Zilly

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