Shape reconstruction from an endoscope image by shape-from-shading technique for a point light source at the projection center

Koichiro Deguchi, Takayuki Okatani

Research output: Contribution to conferencePaper

22 Citations (Scopus)

Abstract

This paper describes an approach to reconstructing a shape from it's shaded image in the case where a point light source is at the projection center. This condition well approximates the imaging system of an endoscope. In this case, the image gray level depends on not only the gradient of the object surface but also the distance from the light source to each point on the surface. To deal with this difficulty, we introduce the evolution equation for equal-range contours on the surface. Propagating this contour by solving the equation, we can reconstruct a shape. Experimental results for real medical endoscope images of a human stomach inner wall show feasibility of this method, and present a promising technique for morphological analysis of tumors on human inner organs.

Original languageEnglish
Pages290-298
Number of pages9
Publication statusPublished - 1996 Jan 1
Externally publishedYes
EventProceedings of the 1996 Workshop on Mathematical Methods in Biomedical Image Analysis - San Francisco, CA, USA
Duration: 1996 Jun 211996 Jun 22

Other

OtherProceedings of the 1996 Workshop on Mathematical Methods in Biomedical Image Analysis
CitySan Francisco, CA, USA
Period96/6/2196/6/22

ASJC Scopus subject areas

  • Engineering(all)

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    Deguchi, K., & Okatani, T. (1996). Shape reconstruction from an endoscope image by shape-from-shading technique for a point light source at the projection center. 290-298. Paper presented at Proceedings of the 1996 Workshop on Mathematical Methods in Biomedical Image Analysis, San Francisco, CA, USA, .