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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 10 — May. 14, 2007
  • pp: 6140–6145

Regularity based descriptor computed from local image oscillations

Leonardo Trujillo, Gustavo Olague, Pierrick Legrand, and Evelyne Lutton  »View Author Affiliations

Optics Express, Vol. 15, Issue 10, pp. 6140-6145 (2007)

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This work presents a novel local image descriptor based on the concept of pointwise signal regularity. Local image regions are extracted using either an interest point or an interest region detector, and discriminative feature vectors are constructed by uniformly sampling the pointwise Hölderian regularity around each region center. Regularity estimation is performed using local image oscillations, the most straightforward method directly derived from the definition of the Hölder exponent. Furthermore, estimating the Hölder exponent in this manner has proven to be superior, in most cases, when compared to wavelet based estimation as was shown in previous work. Our detector shows invariance to illumination change, JPEG compression, image rotation and scale change. Results show that the proposed descriptor is stable with respect to variations in imaging conditions, and reliable performance metrics prove it to be comparable and in some instances better than SIFT, the state-of-the-art in local descriptors.

© 2007 Optical Society of America

OCIS Codes
(100.5010) Image processing : Pattern recognition
(100.5760) Image processing : Rotation-invariant pattern recognition
(110.2960) Imaging systems : Image analysis

ToC Category:
Image Processing

Original Manuscript: September 18, 2006
Revised Manuscript: December 14, 2006
Manuscript Accepted: February 26, 2007
Published: May 3, 2007

Leonardo Trujillo, Gustavo Olague, Pierrick Legrand, and Evelyne Lutton, "Regularity based descriptor computed from local image oscillations," Opt. Express 15, 6140-6145 (2007)

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