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Announcements

Announcements. Review on Thurs Project 4 due Wed night no later than Friday night (with late days) Extra office hour: Friday 4-5. Photograph. Photograph. Virtual Camera. Morphed View. View Interpolation. Problem Statement Input: two views of an unknown rigid scene

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Announcements

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  1. Announcements • Review on Thurs • Project 4 • due Wed night • no later than Friday night (with late days) • Extra office hour: Friday 4-5

  2. Photograph Photograph

  3. Virtual Camera Morphed View

  4. View Interpolation • Problem Statement • Input: two views of an unknown rigid scene • from unknown viewpoints • Output: in-between views from a virtual camera

  5. Image Morphing Photograph Photograph Photograph Morphed Image Photograph • Linear Interpolation of 2D shape and color

  6. Not quite... Image Morphing for View Synthesis? • We want physically-correct view interpolations • Can image morphing do this? • Goal: extend to handle changes in viewpoint • Produce valid camera transitions

  7. Special Case: Parallel Cameras LeftImage MorphedImage RightImage • Morphing parallel views new parallel views • Linear image motion linear camera motion • Works because projection matrices have a special form

  8. View Morphing in 3 Steps Input Output Input

  9. View Morphing in 3 Steps • 1. Prewarp • align views

  10. View Morphing in 3 Steps • 1. Prewarp • align views • 2. Morph • move camera

  11. View Morphing in 3 Steps • 1. Prewarp • align views • 2. Morph • move camera • 3. Postwarp • point camera

  12. Corrected Photographs Face Recognition

  13. Videos • View morphing • Blanz & Vetter (SIGGRAPH 99) • MIT single view (SIGGRAPH 01) • Yu inv-radiosity (SIGGRAPH 00) • Debevec relight (SIGGRAPH 02) • Video rewrite (SIGGRAPH 97) • Vision-based pong (Seitz tape) • Debevec IBMR in art & cinema tape • Debevec face relighting demo

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