JOURNAL PAPERS & BOOK CHAPTERS

C. Işıl, F. S. Oktem, and A. Koc, “Deep Iterative Reconstruction for Phase Retrieval”, Applied Optics, vol. 58, pp. 5422-5431, 2019.

O. F. Kar and F. S. Oktem, “Compressive Spectral Imaging with Diffractive Lenses.” To appear in Optics Letters.

J. M. Davila, F. S. Oktem, and F. Kamalabadi, “Slitless Solar Imaging Spectroscopy.” To appear in The Astrophysical Journal.

F. S. Oktem, “Image Reconstruction in Near-Field Microwave Imaging.” To appear in Turk. J. Elec. Eng. & Comp. Sci.

S. Ayazgok and F. S. Oktem, “Efficient Computation of 2D Point-Spread Functions for Diffractive Lenses.” Under review.

K.B. Alici, O. Karci, A.S. Yilmaz, F. S. Oktem, and O. Selimoglu, “Image Chain Simulation for Earth Observation Satellites.” Under review.

F. S. Oktem, F. Kamalabadi, and J. M. Davila, “Analytical Fresnel Imaging Models for Photon Sieves,” Optics Express, vol. 26, no. 24, pp. 32259-32279, 2018.

F. S. Oktem, L. Gao, and F. Kamalabadi, “Chapter 5: Computational Spectral and Ultrafast Imaging via Convex Optimization.” V. Monga (ed.), Handbook of Convex Optimization Methods in Imaging Science, Springer, Cham, pp. 105-127, 2018.

K. B. Alici, H. Buyuk, A. S. Yilmaz, C. Ozdemir, O. Karci, F. S. Oktem, and O. Selimoglu, “Periodic aperture imaging.” Optical Engineering, vol. 56, pp. 050502, 2017.

F. S. Oktem and H. M. Ozaktas, “Effect of spatial distribution of partial information on the accurate recovery of optical wave fields.” Applied Optics, vol. 56, pp. A133-A144, 2017.

F. S. Oktem, and H. M. Ozaktas, “Chapter 7: Linear canonical domains and degrees of freedom of signals and systems.” J.J. Healy et al. (eds.), Linear canonical transforms, Springer, New York, pp. 293-327, 2016.

A. Koc, F. S. Oktem, H. M. Ozaktas, and M. A. Kutay, “Chapter 9: Fast Algorithms for Dig- ital Computation of Linear Canonical Transforms.” J.J. Healy et al. (eds.), Linear canonical transforms, Springer, New York, pp. 197-239, 2016.

F. S. Oktem, F. Kamalabadi, and J. M. Davila, “A parametric estimation approach to instantaneous spectral imaging,” IEEE Trans. Image Process., vol. 23, pp. 5707-5721, 2014.

H. M. Ozaktas and F. S. Oktem, “Phase-space window and degrees of freedom of optical systems with multiple apertures.” J. Opt. Soc. Am. A., vol. 30, pp.682-690, 2013.

F. S. Oktem and H. M. Ozaktas, “Equivalence of linear canonical transform domains to fractional Fourier domains and the bicanonical width product: a generalization of the space- bandwidth product,” J. Opt. Soc. Am. A, vol. 27, pp. 1885-1895, 2010.

F. S. Oktem and H. M. Ozaktas, “Exact relation between continuous and discrete linear canonical transforms,” IEEE Signal Process. Lett., vol. 16, pp. 727-730, 2009.

CONFERENCE PAPERS

Ç. Işıl and F. S. Oktem, “Deep Learning-Based Hybrid Approach for Phase Retrieval.” To appear in 2019 OSA Imaging and Applied Optics Congress, Munich, Germany, 24-27 June 2019.

D. Doğan and F. S. Oktem, “Convolutional Inverse Problems in Imaging with Convolutional Sparse Models.” To appear in 2019 OSA Imaging and Applied Optics Congress, Munich, Germany, 24-27 June 2019.

O. F. Kar and F. S. Oktem, “Fast Computational Spectral Imaging with a Programmable
Diffractive Lens.” To appear in 2019 OSA Imaging and Applied Optics Congress, Munich, Germany, 24-27 June 2019.

S. Ayazgok and F. S. Oktem, “Snapshot Spectral Imaging with Generalized Photon Sieves.” To appear in 2019 OSA Imaging and Applied Optics Congress, Munich, Germany, 24-27 June 2019.

D. Doğan and F. S. Oktem, “Dictionary-based Sparse Reconstruction Algorithms for Inverse Problems in Imaging.” To appear in 27th Signal Processing and Communications Applications Conference, 2019 (in Turkish).

S. Ayazgok and F. S. Oktem, “Design Optimization For Snapshot Spectral Imaging.” To appear in 27th Signal Processing and Communications Applications Conference, 2019 (in Turkish).

O.F. Kar, U. Kamaci, F.C. Akyon, and F. S. Oktem, “Compressive Photon-Sieve Spectral Imaging.” In 2018 OSA Imaging and Applied Optics Congress, Orlando, Florida, 25-28 June 2018.

C. Isil and F. S. Oktem, “A Phase-Space Approach to Diffraction-Limited Resolution.” In 2018 OSA Imaging and Applied Optics Congress, Orlando, Florida, 25-28 June 2018.

M. Sadighi, F. S. Oktem, and B. M. Eyuboglu, “Diffusion Tensor Magnetic Resonance Electrical Impedance Tomography versus Magnetic Resonance Conductivity Tensor Imaging.” In 2018 ISMRM Meeting, Paris, France, 16-21 June 2018.

E. Anadol, I. Seker, S. Camlica, T. O. Topbas, S. Koc, L. Alatan, F. S. Oktem, and O. A. Civi, “UWB 3D near-field imaging with a sparse MIMO antenna array for concealed weapon detection” In Proc. SPIE 10633, Radar Sensor Technology XXII, 106331D, 15-19 April 2018.

O. F. Kar, U. Kamaci, F.C. Akyon, and F. S. Oktem, “Effect of Different Priors on Compressive Photon-Sieve Spectral Imaging.” In 26th Signal Processing and Communications Applications Conference, 2018 (in Turkish).

F. C. Akyon, U. Kamaci, and F. S. Oktem, “Image Deconvolution via Efficient Sparsifying Transform Learning.” In 26th Signal Processing and Communications Applications Conference, 2018 (in Turkish).

B. Iskender and F. S. Oktem, “Image Restoration for Sparse Aperture Optical Systems.” In 26th Signal Processing and Communications Applications Conference, 2018 (in Turkish).

U. Kamaci, F.C. Akyon, T. Alkanat, and F. S. Oktem, “Efficient sparsity-based inversion for photon-sieve spectral imagers with transform learning.” In 2017 IEEE GlobalSIP Symposium on Sparse Signal Processing and Deep Learning, 2017.

B. Kocamis and F. S. Oktem, “Optimal Design of Sparse MIMO Arrays for Near-Field Ultrawideband Imaging.” In 2017 25th European Signal Processing Conference (EUSIPCO), 2017.

K.B. Alici, O. Karci, A.S. Yilmaz, C. Ozdemir, F. S. Oktem, and O. Selimoglu, “OTF Analysis of a Spaceborne CMOS Imaging Sensor.” In 8th International Conference on Recent Advances in Space Technologies (RAST), 2017.

B. Kocamis and F. S. Oktem, “Optimal MIMO Array Configuration for Ultrawideband Microwave Imaging.” In 25th Signal Processing and Communications Applications Conference, 1-4, 2017 (in Turkish).

F. S. Oktem, and T. Alkanat, “Fast Computation of Two-Dimensional Point-Spread Functions for Photon Sieves.” OSA Imaging and Applied Optics Congress, JT3A. 34, 2016.

F. S. Oktem, F. Kamalabadi, and J. M. Davila, “Computational spectral imaging with photon sieves.” In 24th Signal Processing and Communications Applications Conference, 425-428, 2016 (in Turkish).

F. S. Oktem, F. Kamalabadi, and J. M. Davila, “High-resolution computational spectral imaging with photon sieves.” In IEEE Int. Conf. on Image Processing (ICIP), 5122–5126, 2014 (“Top 10%” Paper Award).

F. S. Oktem, F. Kamalabadi, and J. M. Davila, “Parameter estimation for instantaneous spectral imaging.” In IEEE Int. Conf. on Acoustic Speech and Signal Processing (ICASSP), 8148–8152, 2014.

H. M. Ozaktas, and F. S. Oktem, “Linear Canonical Transforms, Degrees of Freedom, and Sampling in Optical Signals and Systems.” In 22nd Signal Processing and Communications Applications Conference, 429–432, 2014 (in Turkish).

F. S. Oktem, J. M. Davila, and F. Kamalabadi, “Image formation model for photon sieves.” In IEEE Int. Conf. on Image Processing (ICIP), 2373–2377, 2013.

F. S. Oktem, and H. M. Ozaktas, “Degrees of freedom of optical systems and sig- nals with applications to sampling and system simulation.” In the Proceedings of OSA Imaging Systems and Applications (IS), ITu1E–1, 2013 (Invited).

F. S. Oktem, and H. M. Ozaktas, “Condition number in recovery of signals from partial fractional Fourier domain information.” In the Proceedings of OSA Computational Optical Sensing and Imaging (COSI), JTu4A–18, 2013.

F. S. Oktem, F. Kamalabadi, and J. M. Davila, “Cramer-Rao bounds and instrument optimization for slitless spectroscopy.” In IEEE Int. Conf. on Acoustic Speech and Signal Processing (ICASSP), 2169–2173, 2013.

F. S. Oktem and F. Kamalabadi, “Analytical Precision Limits in Slitless Spectroscopy.” In IEEE Statistical Signal Processing Workshop (SSP), 468–471, 2012.

F. S. Oktem and R. E. Blahut, “Schulz-Snyder Phase Retrieval Algorithm as an Alternating Minimization Algorithm,” In the Proceedings of OSA Computational Optical Sensing and Imaging (COSI), CMC3, 2011.

F. S. Oktem and R. E. Blahut, “Augmenting the Schulz-Snyder Algorithm for Phase Retrieval.” In International Conference on Control and Optimization with Industrial Applications (COIA), Ankara, Turkey, 2011.

F. S. Oktem and H. M. Ozaktas, “Linear Algebraic Analysis of Fractional Fourier Domain Interpolation Problem.” In 17th Signal Processing and Communications Applications Conference, 873–875, 2009 (in Turkish).

CONFERENCE ABSTRACTS

O.F. Kar, U. Kamaci, F.C. Akyon, and F. S. Oktem, “Compressive Photon-Sieve Spectral Imaging.” 20. Ulusal Optik, Elektro-Optik ve Fotonik Çalıştayı, Ankara, Turkey, 14 Sept. 2018.

F. S. Oktem, F. Kamalabadi, and J.M. Davila, “Computational image formation with photon sieves for milli-arcsecond solar imaging.” Novel Techniques for Measurement and Processing of Solar and Space Data, COSPAR, Istanbul, Turkey, 2016.

J.M. Davila, F. S. Oktem, and F. Kamalabadi, “Milli-Arcsecond Imaging of the solar corona.” Novel Techniques for Measurement and Processing of Solar and Space Data, COSPAR, Istanbul, Turkey, 2016.

J. M. Davila, F. S. Oktem, F. Kamalabadi, J. O’Neill, A. Novo-Gradac, A. Daw, and D. M. Rabin, “Milli-Arcsecond (MAS) Imaging of the Solar Corona.” AAS/Solar Physics Division Meeting, Boulder, Colorado, 2016.

J. M. Davila, A. Daw, F. S. Oktem, K. Denis, J. O’Neill, and N.Shaw, “Milli-Arcsecond Diffractive Imaging of the Sun in the Extreme Ultraviolet.” Conference on Measurement Techniques in Solar and Space Physics, Boulder, Colorado, 2015.

F. S. Oktem, F. Kamalabadi, and J.M. Davila, “High-Resolution Solar Imaging With Photon Sieves.” Next Generation Instrumentation in Solar and Space Physics: Critical Measurements From Low Cost Missions/Platforms, AGU Fall Meeting, San Francisco, California, 2014.

F. Kamalabadi, F. S. Oktem, and J.M. Davila, “Slitless Solar Spectroscopy.” Next Generation Instrumentation in Solar and Space Physics: Critical Measurements From Low Cost Missions/Platforms, AGU Fall Meeting, San Francisco, California, 2014.

J. F. O’Neill, J. M. Davila, F. S. Oktem, and A. N. Daw, “Exploring the Photon Sieve: Mathematical Framework and Experimental Categorization”. Next Generation Instrumentation in Solar and Space Physics: Critical Measurements From Low Cost Missions/Platforms, AGU Fall Meeting, San Francisco, California, 2014.

F. S. Oktem, F. Kamalabadi, and J. M. Davila,“Imaging Techniques for High-Resolution and Instantaneous Observations of the Solar Corona.” Seventh Solar Image Processing Workshop, La Roche-en-Ardenne, Belgium, 2014(Invited).

J. F. O’Neill, J.M. Davila, and F. S. Oktem, “Slitless solar spectroscopy”. 2014 Solar Physics Division Meeting, Boston, MA, 2014.

F. S. Oktem, F. Kamalabadi, and J. M. Davila, “Multi-order slitless solar spectroscopy: a Parametric Inversion Approach.” Sixth Solar Image Processing Workshop, Bozeman, MT, 2012.

F. S. Oktem, F. Kamalabadi, and J. M. Davila, “Precision Limits for Source Parameter Estimation in Slitless Spectrometry.” SIAM Conference on Imaging Science, Philadelphia, PA, 2012.

F. S. Oktem and R. E. Blahut, “Analysis and Comparative Evaluation of Methods for Phase Retrieval.” SIAM Conference on Imaging Science, Philadelphia, PA, 2012.