Shape from shading for multiple light sources
JOSA A, Vol. 16, Issue 1, pp. 36-52 (1999)
http://dx.doi.org/10.1364/JOSAA.16.000036
Acrobat PDF (5295 KB)
Abstract
Many shape recovery algorithms—in particular, shape from shading (SFS)—are based on a point source at infinity or a uniform hemispheric source. It will be convenient and useful if we can perform SFS under indoor lights that may be spherical, cylindrical, or flat (ceiling lights) in shape in an uncontrolled environment. As a first step toward this goal we propose a light source model for each of the above shapes for performing SFS. In this study we give the derivation of the rectangular, spherical, and cylindrical light source models. In indoor environments the positions (usually on the ceiling or walls) of the light sources are known. Assuming that the target object is small relative to the distances from the sources, we have derived a reflectance map for the Lambertian surface of an object under a mixture of light sources of the above shapes. Hence the shape recovery can be performed by using the SFS technique. This is a significant step toward the application of SFS in uncontrolled practical environments under household or office lighting. This technique of shape recovery is verified by many examples of simulations and real experiments, and the results are good.
© 1999 Optical Society of America
[Optical Society of America ]
OCIS Codes
(100.0100) Image processing : Image processing
(150.0150) Machine vision : Machine vision
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
Citation
Ying-li Tian, H. T. Tsui, S. Y. Yeung, and Songde Ma, "Shape from shading for multiple light sources," J. Opt. Soc. Am. A 16, 36-52 (1999)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-16-1-36
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
Related Journal Articles 
- Neural model of first-order and second-order motion perception and magnocellular dynamics (JOSAA)
- Identification of illuminant and object colors: heuristic-based algorithms (JOSAA)
- Visual Communication with Retinex Coding (AO)
- Diagonal versus affine transformations for color correction (JOSAA)
- Color constancy at a pixel (JOSAA)
Related Conference Papers
- Spatial Position Detection of Three-Dimensional Object Using Complex Amplitude Derived from Fourier Transform Profilometry
- Spatial Position Detection of Three-Dimensional Object Using Complex Amplitude Derived from Fourier Transform Profilometry
- Correcting Color Images for Stray-Light Effects by Computationally Solving an Inverse Problem via Selected-Ordinate Image (SORI) Processing
- Optical Non-Invasive Latent Fingerprint Lifting
- How Sharp Must Depth Maps Be for Good 3-D Video Synthesis: Experimental Evaluation and Applications
« Previous Article | Next Article »
OSA is a member of 