Cyclograph

Description of method

1. Capture a 360° movie of the object by either rotating the camera around the object or rotating the object on a rotary table
2. Create strip images by taking the same column from every frame and mosaicing them (equivalent to y-theta slice of x-y-theta volume)
3. Run stereo algorithm on two such images corresponding to two columns same distance from the center
4. Reconstruct 3D structure using the disparities calculated by stereo (more explanation)

TODO

• Manually clean up cereal box result
• Derive reconstruction equation using paper's framework
• Correct camera misalignment using rotation axis
• Process new captures from MSR
• Obtain a good reconstruction of a box-shaped object
• Refine existing results (e.g. remove overlapping portion from reconstruction)

Results

Notes:

• Background was subtracted from reconstruction by manually editing the stereo image
• In cereal box example, specular highlight was also removed manually
• In all examples, pixels that are beyond certain distance from the rotation axis were excluded from reconstruction
• Some examples have different versions of reconstruction, based on different averaging window size (which affects the overall smoothness of reconstruction) and confidence threshold ("conf X % means X % of pixels in descending order of confidence were used in reconstruction)

Example	Movies	Images	3D reconstruction
Toy horse	Original sequence Cyclograph sequence	Input images Stereo pair & disparity map Red-blue anaglyph	Bumpy/Conf 100% (Ply | Screen shots) Bumpy/Conf 90% (Ply | Screen shots) Bumpy/Conf 80% (Ply | Screen shots) Bumpy/Conf 70% (Ply | Screen shots) Smooth/Conf 100% (Ply | Screen shots) Smooth/Conf 90% (Ply | Screen shots) Smooth/Conf 80% (Ply | Screen shots) Smooth/Conf 70% (Ply | Screen shots)
Cereal box	Original sequence Cyclograph sequence	Input images Stereo pair & disparity map Red-blue anaglyph	Ply #1 (conf 100%) Ply #2 (conf 90%) | Screen shots Ply #3 (conf 80%)
Human head	Original sequence Cyclograph sequence	Stereo pair & disparity map Red-blue anaglyph	Screen shots Ply file
Santa Claus Candle holder	Original sequence Cyclograph sequence	Stereo pair & disparity map Red-blue anaglyph	Screen shots Ply file
Video cassette box	Original sequence Cyclograph sequence	Stereo pair & disparity map Red-blue anaglyph	Screen shots Ply file
Book (Access)	Original sequence Cyclograph sequence	Stereo pair & disparity map Red-blue anaglyph	Screen shots Ply file
Cookie bag	Original sequence Cyclograph sequence	Stereo pair & disparity map Red-blue anaglyph	Screen shots Ply file