Title

Shape From Shading Using Linear-Approximation

Authors

Authors

P. S. Tsai;M. Shah

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Image Vis. Comput.

Keywords

PHYSICS-BASED VISION; 3D SHAPE; SHAPE FROM SHADING; ILLUMINANT DIRECTION; Computer Science, Artificial Intelligence; Computer Science, Software; Engineering; Computer Science, Theory & Methods; Engineering, Electrical; & Electronic; Optics

Abstract

In this paper, we present an extremely simple algorithm for shape from shading, which can be implemented in 25 lines of C code*. The algorithm is very fast, taking 0.2 seconds on a Sun SparcStation-1 for a 128 x 128 image, and is purely local and highly parallelizable (parallel implementation included). In our approach, we employ a linear approximation of the reflectance function, as used by others. However. the main difference is that we first use the discrete approximations for surface normal, p and q, using finite differences, and then linearize the reflectance function in depth, Z(x, y), instead of p and q. The algorithm has been tested on several synthetic and real images of both Lambertian and specular surfaces. and good results have been obtained.

Journal Title

Image and Vision Computing

Volume

12

Issue/Number

8

Publication Date

1-1-1995

Document Type

Article

Language

English

First Page

487

Last Page

498

WOS Identifier

WOS:A1994PG38400002

ISSN

0262-8856

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