View Morphing Steven M' Seitz Charles R' Dyer

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View MorphingSteven M. SeitzCharles R. Dyer

• Presented by Brian Ricks,
• A Non-Profit Organization

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Pause for Laughter
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What Are Traditional Morphs Used For?

• Scientists have proven that morphs are only used
  for entertainment value See Rogers and
  Hammerstein, 1932.
• Consider the following

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How Are Morphs Done
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Result
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Why Use Morphing

• Independent of Scene Complexity
• No 3D information needed
• You can get them for free online

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Problems With Morph Technique

• Morphs are not shape preserving because they do
  not take into account any information about the
  scene or camera.

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Traditional Morphing

• Consider the following rotation.
• What would a traditional morph produce?

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Results of Morph
Notice that this transition is not shape
preserving.
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Our Goal

• Have the morph look like what you would get if
  you moved the camera.

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What We Need

• Two pictures (its true)
• The projection matrices (they say this is easy)
• Correspondence between pixels

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Steps

• Calculate Projection Matrices (Makes scene
  parallel)
• Then
• Prewarp Apply projection warps to first and last
  image. (Corresponding points in same scanline.)
• Morph
• Postwarp Apply project warp to each frame.

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More

• Use disparity as a ZBuffer
• Interpolate for holes.
• Can also manually specify points if projections
  not known.

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Results(Not in black and white)
Yes, thats a guy up there.
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Results
The Da Vinci Code II
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Problems

• Still requires some user input, both to create
  the mesh and to post-warp
• Doesnt handle holes. (Not that anything would)
• Blurry without resampling.