18 August 2014 Real-time processing of off-axis interferograms: from the camera to the user
Author Affiliations +
Abstract
We review new algorithms that have been presented by us lately1 for fast reconstruction and phase unwrapping of sample wave-fronts recorded using off-axis digital holographic imaging. These algorithms enable reconstruction and phase unwrapping of sample wave-fronts up to 16 times faster than the conventional Fourier-based reconstruction algorithm. The algorithms exploit the compression properties of holographic imaging for decreasing the calculation complexity required for extracting the sample wave-front from the recorded interferogram. Using the presented algorithms, we were able to reconstruct, for the first time, 1 Mega pixels off-axis interferograms in more than 30 frames per second using a standard single-core personal computer on a Matlab-Labview interface, without using a graphic processing-unit programming or parallel computing. This computational speedup is important for real-time visualization, calculation and data extraction for dynamic samples and processes that are evaluated using off-axis digital holography such as biological cell imaging and real-time nondestructive testing.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pinhas Girshovitz, Tamir Gabay, Natan T. Shaked, "Real-time processing of off-axis interferograms: from the camera to the user", Proc. SPIE 9203, Interferometry XVII: Techniques and Analysis, 920304 (18 August 2014); doi: 10.1117/12.2064447; https://doi.org/10.1117/12.2064447
PROCEEDINGS
7 PAGES


SHARE
Back to Top