Capturing And Viewing Big, Wide, And Deep Imagery Michael F. Cohen Matt Uyttendaele Johannes Kopf MSR – Interactive Visual Media Universitaet Konstanz
BIG 3,600,000,000 Pixels Created from about MegaPixel Images
BIG
Wide 150 degrees “Normal” perspective projections cause distortions.
Deep High Dynamic Range 100X variation in Radiance
Big, Wide, And Deep No longer a single “image” –So what is it? Requires a VIEWER to “explore” Issues –Capture –Viewing
Capture
Capturing Gigapixel Images
RAW
DeVignette
White Balance
Exposure Balance
Feature Points
Feature Matches
Align Tone-mapped
Capturing Gigapixel Images
Tile Pyramid
Viewing Gigapixel Images (Wide) Want to pan and zoom Question: what “projection” = mapping from directions in the world to points on the image Most cameras use Perspective = flat film plane Panoramic cameras use Cylindrical Spherical or Fisheye are yet other mappings
Viewing Gigapixel Images (Wide) Perspective is good for narrow angle –Straight lines stay straight –Most like our perception –But distorts at wide angle Cylindrical, Spherical are good for wide angles –Allows you to see whole field of view –But makes straight lines curved and feels flat when panning Want best of both!
Viewing Gigapixel Images (Wide) Perspective Cylindrical Ours
Viewing Gigapixel Images (Deep)
HD View
Big, Wide, Deep Images Thanks