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Panoramas General Considerations | Cylindrical | Spherical | Cubic Rectilinear | Multimedia Panos Cubic Panoramas Cubic panos are built by mathematically projecting an environment's photographic information onto the inside of an imaginary cube that surrounds the environment. They offer up to a full 360 degree by 360 degree record of the scene in both horizontal and vertical directions. This view is analogous to what a viewer would see standing on a rotating platform with a remote control in hand that could turn the platform to the left and right as desired. The viewer could look from straight up to straight down at any at any point in the rotation. This six sided enclosure can capture the whole environment. This is helpful when the scene contains important information in the foreground and/or directly overhead. Cubic panos can be used in any environment but are particularly suited to representing the rectilinear volumes frequently found in architectural settings. Apple's QTVR software uses cubic panos to display full vertical field of view environments. Cubic panos can be constructed in several ways: Cubic panoramas can be built by stitching together multiple rows of photographs taken as the camera rotates around its viewpoint. Each row is photographed with the camera pitched (tilted) at a different angle so that the entire vertical field of view is documented. Cubic panos can be created from photographs of reflective spheres. Cubic panoramas can also be generated by the reprojection of a spherical pano into a cubic format. When cubic panos are captured using high dynamic range techniques (HDR), a method that attempts to accurately capture true light intensity from very bright light sources to very dark, these panos can be used to realistically illuminate virtual 3D worlds. |
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