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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 4 — Feb. 1, 2010
  • pp: 619–624

Orientation-selective edge detection and enhancement using the irradiance transport equation

Jorge L. Flores and José A. Ferrari  »View Author Affiliations


Applied Optics, Vol. 49, Issue 4, pp. 619-624 (2010)
http://dx.doi.org/10.1364/AO.49.000619


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Abstract

We present a method for orientation-selective edge detection and enhancement based on the irradiance transport equation. The proposed technique distinguishes the sign of the derivative of the intensity pattern along an arbitrarily selected direction. The method is based on the capacity of liquid-crystal displays to generate simultaneously a contrast reverted replica of the image displayed on it. When both images (the original one and its replica) are imagined across a slightly defocused plane, one obtains an image with enhanced first derivatives. Unlike most Fourier methods, the proposed technique works well with a low-coherence light source, and it does not require precise alignment. The proposed method does not involve numerical processing, and thus it could be potentially useful for processing large images in real-time applications. Validation experiments are presented.

© 2010 Optical Society of America

OCIS Codes
(100.2810) Image processing : Halftone image reproduction
(100.2980) Image processing : Image enhancement

ToC Category:
Image Processing

History
Original Manuscript: October 7, 2009
Manuscript Accepted: December 5, 2009
Published: January 26, 2010

Citation
Jorge L. Flores and José A. Ferrari, "Orientation-selective edge detection and enhancement using the irradiance transport equation," Appl. Opt. 49, 619-624 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-4-619


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