Guiding notes for photographing for 3D reconstructionWritten by Paul Bourke
The following gives some guiding principles on photography for 3D reconstruction purposes, that is, automatically reconstructing a textured 3D model from photographs. The software upon which these principles have been tested are: Bundler based, 123D Catch, and PhotoScan. There is no substitute for experimenting and gaining a feel for the best approach, but hopefully the following will provide a short-cut.
Cameras (blue rectangles) circle the central rock in approximately 20 degree steps.
Example 2: Lion statue, Hong Kong Dragon Gardens
More complicated object requires photographs (red) at different heights to capture internal convolutions.
Example 3: Temple façade, Gommateswara, India
2.5D panels require the fewest photographs. Shown here in a circular arc but a linear sweep would be just as good.
Example 4: Dragon staircase, Hong Kong
2.5D example but illustrating overlapping linear photographic track. Each shot only has a portion of the object in view.