NDLI: Region specific magnification on digital holograms at 100 frames per second

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Region specific magnification on digital holograms at 100 frames per second

Content Provider	Springer Nature Link
Author	Tsang, P. W. M. Poon, T. C
Copyright Year	2013
Abstract	We report a fast method for magnifying a selected region of the pictorial content that has been recorded in a digital hologram, without the need of regenerating the latter from the original object scene. In essence, the hologram is first back-projected to a complex, two dimensional virtual diffraction plane (VDP) which is located at close proximity to the original object points. Next, the fringe patterns in the selected region of the VDP, which corresponds to the complex light wave emerged from the part of the object within the coverage of the region, is transformed to achieve the magnification effect. Subsequently, the processed field distribution on the VDP is expanded into a full hologram. We have applied our proposed method to realize a magnifying glass effect, so that the reconstructed image of the hologram will zoom into a specific region of the object scene. For a medium size digital hologram comprising of 2048 × 2048 pixels, the magnifying process can be realized in less than 10ms (equivalent to a rate of around 100 frames per second). To the best of our knowledge, this is the first time region specific magnification at such a high frame rate is considered and achieved in the context of digital holography.
Starting Page	1
Ending Page	4
Page Count	4
File Format	PDF
Journal	3D Research
Volume Number	4
Issue Number	3
e-ISSN	20926731
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-09-07
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Digital Hologram Virtual Diffraction Plane Region Specific Magnification Signal, Image and Speech Processing Computer Imaging, Vision, Pattern Recognition and Graphics Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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