Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 5,
  • Issue 4,
  • pp. 204-207
  • (2007)

Fast algebra algorithm of shape-from-shading with specular reflectance

Not Accessible

Your library or personal account may give you access

Abstract

Shape-from-shading (SFS) is to reconstruct three-dimensional (3D) shape from a single gray image, which is an important problem in computer vision. We propose a novel SFS method based on hybrid reflection model which contains both diffuse reflectance and specular reflectance. The intensity gradient of image is in the direction that the shape of surface changes most, so we use directional derivative of the reflectance map as parts of objective function. When discrete characteristic of digital images is considered, finite difference approximates differential operator. So the reflectance map equation described by a partial differential equation (PDE) turns into an algebra equation about the unknown surface height correspondingly. Using iterative numeric computation, a new SFS method is gained. Experiments on synthesis and real images show that the proposed SFS method is accurate and fast.

© 2007 Chinese Optics Letters

PDF Article
More Like This
Shape from shading for multiple light sources

Ying-li Tian, H. T. Tsui, S. Y. Yeung, and Songde Ma
J. Opt. Soc. Am. A 16(1) 36-52 (1999)

Shape recovery from fusion of polarization binocular vision and shading

Zhiying Tan, Weifeng Kong, Yan Ji, Xu Tao, Jinying Zhao, Meiling Wang, and Xiaobin Xu
Appl. Opt. 62(23) 6194-6204 (2023)

Shape-from-shading on a cloudy day

M. S. Langer and S. W. Zucker
J. Opt. Soc. Am. A 11(2) 467-478 (1994)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved