CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 11510 > Article
Poster + Paper
21 August 2020 Noise phase singularities in noise contaminated images
Astrid Villamizar Amado, Nelly Cap, Silvana Gallo, Héctor Rabal, Myrian Tebaldi
Author Affiliations +
Proceedings Volume 11510, Applications of Digital Image Processing XLIII; 115102V (2020) https://doi.org/10.1117/12.2568733
Event: SPIE Optical Engineering + Applications, 2020, Online Only
Conference Poster
Abstract
As it is well known, the vortices or phase singularities are optimal encoders for position marking. The pseudo-phase singularities information can be obtained from the complex signal resulting from Laguerre-Gauss filtering of the intensity image. Each singularity has its unique anisotropic core structures with different ellipticity and azimuth angles from each other. Indeed, the Poincaré sphere representation can be used to characterize the mentioned singularities. In optical vortex metrology the correct identification and the tracking of the complicated movement of pseudo-phase singularities is essential. In particular, it is relevant the singularity in the poles of the sphere. When the singularities are located at or near the equator of the sphere, the zero crossings of the real and imaginary planes cut in a straight line which makes their location difficult. These phase singularities near the equator tend to disappear when a transformation of the object, such as a deformation takes place. In this work, we analyze the number of vortices in analytical representation of a noise contaminated image. Different types of noise are analyzed (Gaussian, random, Poisson, etc.). We verified that the noise increases essentially the number of vortices at and near the equator of the Poincaré sphere.
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Astrid Villamizar Amado, Nelly Cap, Silvana Gallo, Héctor Rabal, and Myrian Tebaldi "Noise phase singularities in noise contaminated images", Proc. SPIE 11510, Applications of Digital Image Processing XLIII, 115102V (21 August 2020); https://doi.org/10.1117/12.2568733
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 8 PAGES + POSTER
DOWNLOAD PAPER SAVE TO MY LIBRARY
DOWNLOAD
POSTER
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Poincaré sphere
Image filtering
Optical vortices
Singular optics
Speckle pattern
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top