OSA's Digital Library

Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 8 — Apr. 15, 2010
  • pp: 1272–1274

Focus measure based on the energy of high-frequency components in the S transform

Muhammad Tariq Mahmood and Tae-Sun Choi  »View Author Affiliations


Optics Letters, Vol. 35, Issue 8, pp. 1272-1274 (2010)
http://dx.doi.org/10.1364/OL.35.001272


View Full Text Article

Enhanced HTML    Acrobat PDF (365 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Focus measure plays a fundamental role in the shape from focus technique. In this Letter, we suggest a focus measure in the S-transform domain that is based on the energy of high-frequency components. A localized spectrum by using variable window size provides a more accurate method of measuring image sharpness as compared to other focus measures proposed in spectral domains. An optimal focus measure is obtained by selecting an appropriate frequency-dependent window width. The performance of the proposed focus measure is compared with those of existing focus measures in terms of three-dimensional shape recovery. Experimental results demonstrate the effectiveness of the proposed focus measure.

© 2010 Optical Society of America

OCIS Codes
(100.3020) Image processing : Image reconstruction-restoration
(100.6890) Image processing : Three-dimensional image processing
(100.4994) Image processing : Pattern recognition, image transforms

ToC Category:
Image Processing

History
Original Manuscript: December 4, 2009
Manuscript Accepted: February 26, 2010
Published: April 15, 2010

Citation
Muhammad Tariq Mahmood and Tae-Sun Choi, "Focus measure based on the energy of high-frequency components in the S transform," Opt. Lett. 35, 1272-1274 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-8-1272


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. A. N. Simonov and M. C. Rombach, Opt. Lett.  34, 2111 (2009). [CrossRef] [PubMed]
  2. M. B. Ahmad and T. S. Choi, IEEE Trans. Circuits Syst. Video Technol.  15, 566 (2005). [CrossRef]
  3. A. S. Malik and T. S. Choi, Pattern Recogn.  40, 154 (2007). [CrossRef]
  4. S. K. Nayar and Y. Nakagawa, IEEE Trans. Pattern Anal. Mach. Intell.  16, 824 (1994). [CrossRef]
  5. M. T. Mahmood, S. O. Shim, and T. S. Choi, Opt. Eng.  48, 057203 (2009). [CrossRef]
  6. L. Sang-Yong, Y. Kumar, C. Ji-Man, L. Sang-Won, and K. Soo-Won, IEEE Trans. Circuits Syst. Video Technol.  18, 1237 (2008). [CrossRef]
  7. R. G. Stockwell, L. Mansinha, and R. P. Lowe, IEEE Trans. Signal Process.  44, 998 (1996). [CrossRef]
  8. R. A. Brown, M. L. Lauzon, and R. Frayne, IEEE Trans. Signal Process.  58, 281 (2010). [CrossRef]
  9. E. Sejdic, I. Djurovic, and J. Jiang, EURASIP J. Adv. Signal Process.  672941, 13 (2008).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Figures

Fig. 1 Fig. 2
 

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited