Point spread function (PSF) measurement for cell phone camera with a high resolution PSF of the imaging lens and a sub-pixel digital algorithm

2008 ◽  
Author(s):  
Changmeng Liu ◽  
Xi Chen
Keyword(s):  
High Resolution ◽  
Point Spread Function ◽  
Cell Phone ◽  
Point Spread ◽  
Spread Function ◽  
Digital Algorithm

scholarly journals High-resolution CLEAN-SC: Theory and experimental validation

2017 ◽  
Vol 16 (4-5) ◽  
pp. 274-298 ◽  
Author(s):  
Pieter Sijtsma ◽  
Roberto Merino-Martinez ◽  
Anwar MN Malgoezar ◽  
Mirjam Snellen
Keyword(s):  
High Resolution ◽  
Point Spread Function ◽  
Experimental Validation ◽  
Microphone Array ◽  
Relative Influence ◽  
Point Spread Functions ◽  
Point Spread ◽  
Spread Function ◽  
2D And 3D ◽  
Source Markers

In this article, a high-resolution extension of CLEAN-SC is proposed: high-resolution-CLEAN-SC. Where CLEAN-SC uses peak sources in ‘dirty maps’ to define so-called source components, high-resolution-CLEAN-SC takes advantage of the fact that source components can likewise be derived from points at some distance from the peak, as long as these ‘source markers’ are on the main lobe of the point spread function. This is very useful when sources are closely spaced together, such that their point spread functions interfere. Then, alternative markers can be sought in which the relative influence by point spread functions of other source locations is minimised. For those markers, the source components agree better with the actual sources, which allows for better estimation of their locations and strengths. This article outlines the theory needed to understand this approach and discusses applications to 2D and 3D microphone array simulations with closely spaced sources. An experimental validation was performed with two closely spaced loudspeakers in an anechoic chamber.

Image restoration of the asymmetric point spread function of a high-resolution remote sensing satellite with time-delayed integration

2011 ◽  
Vol 47 (4) ◽  
pp. 690-701 ◽  
Author(s):  
Dong-Han Lee ◽  
Ji Yeon Yang ◽  
Doo Chun Seo ◽  
Jeong Heon Song ◽  
Jae Heon Chung ◽  
...  
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Image Restoration ◽  
Point Spread Function ◽  
Point Spread ◽  
Spread Function ◽  
Remote Sensing Satellite
Sign in / Sign up

Export Citation Format

Share Document