By Peter G. J. Barten

ISBN-10: 0819434965

ISBN-13: 9780819434968

Examines distinction sensitivity of the human visible system--concerning the eye's skill to tell apart items from one another or from the background--and its results at the image-forming approach. The textual content offers equations for identifying numerous facets of distinction sensitivity, as well as versions (mathematical expressions) that may simply be tailored for useful applications.


- Introduction
- References
- Modulation threshold and noise
- version for the spatial distinction sensitivity of the eye
- Extension of the distinction sensitivity version to extra-foveal vision
- Extension of the distinction sensitivity version to the temporal domain
- impression of nonwhite spatial noise on distinction sensitivity
- distinction discrimination model
- photograph caliber measure
- influence of varied parameters on photograph quality
- Epilogue
- Summary
- Samenvatting
- Acknowledgments
- Curriculum Vitae

Show description

Read Online or Download Contrast Sensitivity of the Human Eye and Its Effects on Image Quality PDF

Similar ophthalmology books

Download e-book for kindle: Intraocular Drug Delivery by Glenn J. Jaffe, Paul Ashton, P. Andrew Pearson

This reference reviews the newest advances within the improvement of ocular drug supply structures. overlaying how to deal with or hinder ocular irritation, retinal vascular ailment, retinal degeneration, and proliferative eye sickness, this resource covers breakthroughs within the administration of endophthalmitis, uveitis, diabetic macular edema, and age-related macular degeneration.

Download PDF by Mireille Bonnet, Helene Bret: Microsurgery of Retinal Detachment

From the foreword:"Microsurgery of Retinal Detachment is a vital contribution to the perform of vitreoretinal surgical procedure. during this accomplished quantity, Dr. Bonnet stocks her huge event within the administration of stipulations starting from retinal tears and first retinal detachment to large retinal breaks and vitreoretinal surgical procedure.

Download e-book for iPad: The Cornea in Measles by N.W.H.M. Dekkers

The necessity to research the corneal issues of measles used to be now not very seen. every body knew of the (kerato) conjunctivitis of measles and regarded it to be an risk free characteristic of the illness. each scientific employee in constructing international locations knew that measles in below- or malnourished young ones runs a really severe path resulting in, e.

Ronald Krueger MD, Scott MacRae MD, Raymond Applegate MD's Wavefront Customized Visual Correction: The Quest for Super PDF

A brand new paradigm in ophthalmology has been brought with the common scientific software of ocular wavefront sensing and customised corneal correction. now not is the technological know-how of aberrations restrained to the scientist and physicist. It has now entered the realm of the surgeon and healthcare professional, and with that the realm of each eyecare expert, and the sufferers they serve.

Additional resources for Contrast Sensitivity of the Human Eye and Its Effects on Image Quality

Sample text

1972) 1-d dyn. 16 Pelli ( 1985) 2-d dyn. 9*) Thomas ( 1985) l-d stat. 0 Legge et ai. ( 1987) 2-d dyn. 5 van Meeteren et ai. (1988) 2-d stat. 5 *) After correction of the spectral density with a factor 2 3 due to the use of a different definition of the spectral noise density. For T, it has been assumed that with a presentation time To of the object and an integration time Te of the eye, the shortest of both has to be used. 45) This expression also holds when To and Te are about equal. 1 sec for nearly allluminance leveis, and only a slightly higher value at very low luminance leveis.

16) Care should be taken in the use of d' values, because d' is not linearly related with the value of z used in Eq. 2). The relation between d' and z can be derived frorn Eqs. 6. ln practice the value d' = 1 is used to characterize the threshold. This value corresponds with p2AFc = 7 6% instead of 75%. For a sinusoidal luminance pattem, the signal strength s is given by the rnodulation m of the lurninance pattem and the threshold signal s0 by the modulation threshold mt at SOOAl probability of detection.

34) For practical reasons this function will simply be called here spectral density, so the additions urelative" and upower" will further be omitted. By using this function, Eq. 35) The spectral density used here is the two-sided defined spectral density (See Legge et al. 1987) contrary to the sometimes used one-sided defined spectral density. From Eq. 36) By introducing Eq. 34) in Eq. 30), one obtains with the aid of Eq. 37) Chapter 2. Modulation threshold and noise 18 For noise, the sarne expressions are validas for a normal image.

Download PDF sample

Contrast Sensitivity of the Human Eye and Its Effects on Image Quality by Peter G. J. Barten

by Joseph

Rated 5.00 of 5 – based on 4 votes