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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 29 — Oct. 10, 2009
  • pp: 5589–5597

Use of two-dimensional phase-only filters and compounding for speckle reduction and edge detection in ultrasonic B-scan images

P. M. Shankar  »View Author Affiliations


Applied Optics, Vol. 48, Issue 29, pp. 5589-5597 (2009)
http://dx.doi.org/10.1364/AO.48.005589


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Abstract

Phase-only filters (POF) are studied for speckle reduction and edge detection in ultrasonic images. A methodology is developed for selecting the filters and compounding the filtered outputs. Studies on four speckled images show that the parametric images of compounded phases highlighted the boundaries. Estimating the heterogeneity index defined as the ratio of the arithmetic to the geometric mean of the magnitudes, the boundaries were also highlighted, providing a second means of detecting boundaries. This technique based on diversity created through a bank of POF reduces the speckle as well as highlights the boundaries of targetlike regions.

© 2009 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(100.2000) Image processing : Digital image processing
(100.5090) Image processing : Phase-only filters
(110.7170) Imaging systems : Ultrasound
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(070.2615) Fourier optics and signal processing : Frequency filtering

ToC Category:
Image Processing

History
Original Manuscript: July 21, 2009
Revised Manuscript: September 21, 2009
Manuscript Accepted: September 22, 2009
Published: October 6, 2009

Virtual Issues
Vol. 4, Iss. 12 Virtual Journal for Biomedical Optics

Citation
P. M. Shankar, "Use of two-dimensional phase-only filters and compounding for speckle reduction and edge detection in ultrasonic B-scan images," Appl. Opt. 48, 5589-5597 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-29-5589

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