Depth from defocus using structured light is a useful optical metrology technique since the camera and projector can be placed on the same optical axis and it can cope with depth discontinuities. However, the technique can suffer from large errors when used on surfaces with differing reflective properties. This paper demonstrates a method for overcoming this problem.
© 2011 Optical Society of America
Original Manuscript: March 28, 2011
Revised Manuscript: May 11, 2011
Manuscript Accepted: May 11, 2011
Published: June 7, 2011
Philip Birch, Alastair Buchanan, Rupert Young, and Chris Chatwin, "Depth from structured defocus that is independent of the object reflectivity function," Opt. Lett. 36, 2194-2196 (2011)