Cylindrical%20panoramas

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Cylindrical panoramas
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Rotation Only - Calibrated Case

• Calibrated Two views related by rotation only
• Mapping to a reference view rotation can be
  estimated
• Mapping to a cylindrical surface

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Matching SIFT Features
Brown 2003
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Reject Outliers using RANSAC
Brown 2003
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Stitching Images
Brown 2003
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Do we have to project on to a plane ?
Camera Center
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Cylindrical Projection
Camera Center
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Cylindrical projection

• Map 3D point (X,Y,Z) onto cylinder

unit cylinder
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Cylindrical Projection
Y
X
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Inverse Cylindrical projection
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Removing Seams

• Differences in exposure
• Vignetting
• Small misalignments

Brown 2003
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Multi-band Blending

• Burt and Adelson 1983
• Multi-resolution technique using image pyramid
• Hides seams but preserves sharp detail

Brown 2003