Real-time processing of off-axis interferograms: from the camera to the user
| Autor: | Natan T. Shaked, Tamir Gabay, Pinhas Girshovitz |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Wavefront
Pixel Computer science business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Holography Holographic imaging Reconstruction algorithm Frame rate Sample (graphics) law.invention symbols.namesake Interferometry Fourier transform law Computer graphics (images) Nondestructive testing Personal computer symbols Computer vision Artificial intelligence business Digital holography |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| Popis: | We review new algorithms that have been presented by us lately 1 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 reco rded 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. Keywords: Phase extraction, Phase reconstr uction, Real time imaging, Interferometry, Digital holography. |
| Databáze: | OpenAIRE |
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