Critical examination of the slanted-edge method for color SFR measurement reveals inaccuracies in the estimated SFR, due to the use of demosaicing. The proposed method resolves these inaccuracies by eliminating the need for demosaicing during SFR measurement. OCIS codes: (110.4100) Modulation transfer function; (110.4850) Optical transfer functions

Although turbulence is usually considered to be the primary cause of image blur, simultaneous and independent measurements of overall atmospheric modulation transfer function (MTF) and turbulence MTF over fairly long horizontal paths at 15-m average elevation indicate that, even at midday, aerosol MTF deriving from forward scatter is usually more dominant than turbulence MTF. Three different ex...

In this paper we present a methodology for the simulation of continuous-time sigma-delta converters. This method, based on a fixed-step algorithm, permits not only a time-domain simulation of the modulator output but also the simulation of intermediary signals. The method is based on the discretization of the continuous-time models and the use of a discrete simulator such as Simulink, which is ...

Signatures of oceanic internal waves are frequently visible on Synthetic Aperture Radar images. The observed radar backscatter modulations are due to induced surface current variations, but the degree of modulation depend on several factors, such as the phase speed of the internal waves, the ambient wind and viewing geometry. Dimensional analysis is here used to derive simplified expressions re...

Research on random targets for modulation transfer function (MTF) evaluation began in 1986 at the Center for Education and Research in Optics and Lasers (CREOL) located at the University of Central Florida. Under the direction of Dr. Glenn D. Boreman, research was conducted on the use of integrating spheres to produce highly uniform laser speckle. Dr. Boreman demonstrated that the exit port of ...

The literatureshowsthat the modulationtransfer function(MTF) and speech transmissionindex(STI)can becomputedfrom thesquaredimpulseresponseof a linear passivesystem. Thispaper describesan extensionof this methodto measurementsof systemsusing time delay spectrometry(TDS). The new methodmakesuseof boththe realand imaginarypartsof the complexanalytic impulse responseof the system(the energy-timeres...

An ideal lens would be one which is able to produce an image which represents an object exactly. An ideal lens could transfer all of the details of the object to the image without any variations. An ideal lens, however, could only exist under ideal conditions, and in the real world ideal conditions can not be achieved. As such, we must deal with real lenses, and real lenses produce slight varia...