Speaker: Ariel Schwarz
Affiliation: Bar Ilan University
(Seminar in conjunction with Prof. Amir Shemer)
Abstract: Super-resolution (SR) is an innovative field that deals with approaches of overcoming the classical resolution limits of imaging systems. The resolution of an optical system is characterized by the finest detail that can be detected by that system. Classically, optical systems are considered to have a fundamental resolution limit due to diffraction. The diffraction limit depends on the aperture of the imaging lens, its focal length and the wavelength. As a result of diffraction, spatial frequencies in the image are effectively cut off beyond the resolution limit.
This talk introduces several approaches to achieve super resolved imaging through applying different SR approaches based on multiplexing process such as time and wavelength. The field of SR aims to supply approaches for exceeding the spatial resolving limit existing in a given imaging system and to allow detection of details beyond the classical diffraction limit. SR is achieved by using a priori information about the input signal. This a priori knowledge is used to enlarge the synthetic limitations of the system such as the aperture of the imaging system or the geometry of its detectors. The spatial improvement obtained using SR techniques is obtained by coding the spatial information of the object and its conversion to other domains as time, wavelength and polarization such that it may be spatially low passed by the imaging system and yet be decoded and reconstructed right after in the image plane.
Biography: Ariel Schwarz holds B.Sc. degrees (2006) in physics, biology, and electrical engineering, M.Sc. degree (2008) in physics and Ph.D. degree (2014) in electrical engineering all from Bar Ilan University (BIU), Ramat-Gan, Israel. Between 2014 and 2015, he served as a Postdoctoral Research Fellow at University of Connecticut, Storrs CT, USA. Ariel also holds M.A. and B.A. studies in archeology from the Institute of Archaeology, The Hebrew University of Jerusalem (HUJI), Jerusalem, Israel. He is currently working toward the Ph.D. degree in Archeology in The Dept. of Land of Israel Studies and Archaeology from Bar-Ilan University. He is currently a research associate with the Faculty of Engineering, Bar-Ilan University, Ramat Gan, Israel and a senior lecturer in Jerusalem College of Technology (JCT), Jerusalem, Israel. His major research interests include optical super resolution, biomedical optics, Nano-photonics and Electrooptical devices, Pinhole optics, Diffractive optical elements, and Beam shaping. He is the founder and founder team of several companies: PhotoFree Ltd. (RF based interfere devices), ContinUse Biometrics Ltd. (optical biometric devices), and LensFree Ltd. (nuclear medicine and CT systems).
Date(s) - May 18, 2017
2:00 pm - 3:30 pm
E-IV Tesla Room #53-125
420 Westwood Plaza - 5th Flr., Los Angeles CA 90095