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Surface Determination by Photometric Ranging (2004)
We describe a method for recovering the three dimensional shape
of a surface, using multiple images from a single camera,
closely related to "light field reconstruction" described by Magda
et al. (ICCV 2001). A volume array of switchable illuminators is used to obtain a set of images that are used for the reconstruction.
Unlike photometric stereo, where the illumination is
assumed to be homogeneous, we exploit the inverse-square-law falloff of intensity with the distance between the illuminator and the surface. By placing illuminators at a variety of distances from the measurement volume, a direct estimate of surface range can be obtained, in addition to surface normal estimates obtained as in photometric stereo. We discuss solution methods and present simulation results for a few simple geometries. Aspects of illuminator design and calibration are also considered.
Determination, Photometric, Ranging, Surface
2004 Conference on Computer Vision and Pattern Recognition Workshop (CVPRW'04), v. 3, p. 40.
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