Severity: Warning
Message: file_get_contents(https://...@pubfacts.com&api_key=b8daa3ad693db53b1410957c26c9a51b4908&a=1): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 176
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 176
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 250
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3122
Function: getPubMedXML
File: /var/www/html/application/controllers/Detail.php
Line: 575
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 489
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
In holographic projection, ringing artifacts and degradation appear when the speckle noise problem is solved based on the random phase-free method. In this paper, we present a fast method to suppress the ringing artifacts in random phase-free kinoforms. We first reduce the distance between the hologram plane and the focal plane, and keep the focal length of the convergence light unchanged in the random phase-free method. Next, the complex amplitude is modulated using a single spatial light modulator. Consequently, the ringing artifacts and speckle noise reduction in the reconstructed image can be achieved. At the same time, the computing speed can be increased with our proposed method. Numerical simulations and optical experiments have validated the feasibility of the proposed method.
Download full-text PDF |
Source |
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http://dx.doi.org/10.1364/AO.58.000A13 | DOI Listing |
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