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Zammit, Paul; Harvey, Andrew R.; Carles Santacana, Guillem (2014)
Publisher: Optical Society of America
Languages: English
Types: Article
Subjects:

Classified by OpenAIRE into

arxiv: Computer Science::Computer Vision and Pattern Recognition
Traditional approaches to imaging require that an increase in depth of field is associated with a reduction in\ud numerical aperture, and hence with a reduction in resolution and optical throughput. In their seminal\ud work, Dowski and Cathey reported how the asymmetric point-spread function generated by a cubic-phase\ud aberration encodes the detected image such that digital recovery can yield images with an extended depth of\ud field without sacrificing resolution [Appl. Opt. 34, 1859 (1995)]. Unfortunately recovered images are\ud generally visibly degraded by artifacts arising from subtle variations in point-spread functions with defocus.\ud We report a technique that involves determination of the spatially variant translation of image components\ud that accompanies defocus to enable determination of spatially variant defocus. This in turn enables recovery\ud of artifact-free, extended depth-of-field images together with a two-dimensional defocus and range map\ud of the imaged scene. We demonstrate the technique for high-quality macroscopic and microscopic imaging\ud of scenes presenting an extended defocus of up to two waves, and for generation of defocus maps with an\ud uncertainty of 0.036 waves.
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    • 1. G. Hausler, “A method to increase the depth of focus by two step image processing,” Opt. Commun. 6, 38-42 (1972).
    • 2. J. Edward, R. Dowski, and W. T. Cathey, “Extended depth of field through wave-front coding,” Appl. Opt. 34, 1859-1866 (1995).
    • 3. S. Bradburn, W. T. Cathey, and E. R. Dowski, “Realizations of focus invariance in optical-digital systems with wave-front coding,” Appl. Opt. 36, 9157-9166 (1997).
    • 4. S. Prasad, T. C. Torgersen, V. P. Pauca, R. J. Plemmons, and J. van der Gracht, “Engineering the pupil phase to improve image quality,” Proc. SPIE 5108, 1-12 (2003).
    • 5. M. Demenikov, E. Findlay, and A. R. Harvey, “Miniaturization of zoom lenses with a single moving element,” Opt. Express 17, 6118-6127 (2009).
    • 6. G. Muyo, A. Singh, M. Andersson, D. Huckridge, A. Wood, and A. R. Harvey, “Infrared imaging with a wavefront-coded singlet lens,” Opt. Express 17, 21118-21123 (2009).
    • 7. G. Muyo and A. R. Harvey, “Decomposition of the optical transfer function: wavefront coding imaging systems,” Opt. Lett. 30, 2715-2717 (2005).
    • 8. M. Somayaji, V. R. Bhakta, and M. P. Christensen, “Experimental evidence of the theoretical spatial frequency response of cubic phase mask wavefront coding imaging systems,” Opt. Express 20, 1878-1895 (2012).
    • 9. M. Demenikov and A. R. Harvey, “Image artifacts in hybrid imaging systems with a cubic phase mask,” Opt. Express 18, 8207-8212 (2010).
    • 10. M. Demenikov and A. R. Harvey, “Parametric blind-deconvolution algorithm to remove image artifacts in hybrid imaging systems,” Opt. Express 18, 18035-18040 (2010).
    • 11. X. Mo and J. Wang, “Phase transfer function based method to alleviate image artifacts in wavefront coding imaging system,” Proc. SPIE 8907, 89074H (2013).
    • 12. R. N. Zahreddine, R. H. Cormack, and C. J. Cogswell, “Noise removal in extended depth of field microscope images through nonlinear signal processing,” Appl. Opt. 52, D1-D11 (2013).
    • 13. S. Mezouari and A. R. Harvey, “Phase pupil functions for reduction of defocus and spherical aberrations,” Opt. Lett. 28, 771-773 (2003).
    • 14. N. George and W. Chi, “Extended depth of field using a logarithmic asphere,” J. Opt. A 5, S157-S163 (2003).
    • 15. T. Vettenburg, N. Bustin, and A. R. Harvey, “Fidelity optimization for aberration-tolerant hybrid imaging systems,” Opt. Express 18, 9220-9228 (2010).
    • 16. P. Favaro and S. Soatto, “A geometric approach to shape from defocus,” IEEE Trans. Pattern Anal. Mach. Intell. 27, 406-417 (2005).
    • 17. S. Quirin and R. Piestun, “Depth estimation and image recovery using broadband, incoherent illumination with engineered point spread,” Appl. Opt. 52, A367-A376 (2013).
    • 18. P. M. Blanchard and A. H. Greenaway, “Simultaneous multiplane imaging with a distorted diffraction grating,” Appl. Opt. 38, 6692-6699 (1999).
    • 19. A. K. Prasad, “Stereoscopic particle image velocimetry,” Exp. Fluids 29, 103-116 (2000).
    • 20. F. Pereira and M. Gharib, “Defocusing digital particle image velocimetry and the three-dimensional characterization of two-phase flows,” Meas. Sci. Technol. 13, 683-694 (2002).
    • 21. B. Huang, W. Wang, M. Bates, and X. Zhuang, “Three-dimensional super-resolution imaging by stochastic optical reconstruction microscopy,” Science 319, 810-813 (2008).
    • 22. J. He, X. Zhuang, S. A. Jones, and S.-H. Shim, “Fast, threedimensional super-resolution imaging of live cells,” Nat. Methods 8, 499-505 (2011).
    • 23. G. Carles, “Analysis of the cubic-phase wavefront-coding function: physical insight and selection of optimal coding strength,” Opt. Lasers Eng. 50, 1377-1382 (2012).
    • 24. Y. Feng, P. A. Dalgarno, D. Lee, Y. Yang, R. R. Thomson, and A. H. Greenaway, “Chromatically-corrected, high-efficiency, multicolour, multi-plane 3D imaging,” Opt. Express 20, 20705-20714 (2012).
    • 25. G. Carles, G. Muyo, S. Bosch, and A. Harvey, “Use of a spatial light modulator as an adaptable phase mask for wavefront coding,” J. Mod. Opt. 57, 893-900 (2010).
    • 26. B. Das, S. Vyas, J. Joseph, P. Senthilkumaran, and K. Singh, “Transmission type twisted nematic liquid crystal display for three gray-level phase-modulated holographic data storage systems,” Opt. Lasers Eng. 47, 1150-1159 (2009).
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