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Contrast sensitivity function of sine-wave gratings in children with acute malnutrition. Natanael Antonio dos Santos, Caroline Costa Gomes Alencar and Yuri Henrique Nunes Dias. Universidade Federal da Paraiba, Brazil. Abstract. The aim of this study was to determine the contrast sensitivity curves of sine-wave gratings
ABSTRACT. Inspired by the ModelFest and ColorFest data sets, a contrast sensitivity function was measured for a wide range of adapting luminance levels. The measurements were motivated by the need to collect visual performance data for natural viewing of static images at a broad range of luminance levels, such as can
indicator. Stimuli consisted of a 180" phase reversal of sinusoidally modulated gratings with an average luminance of 2.4 cd/m'. Contrast sensitivity was determined for various spatial frequencies and the MTF was calculated by the least square fit of an exponential function. The average acuity value obtained was. 1.25 c/deg
Letter contrast sensitivity function of the eye. Hwey-Lan Liou and Noel A. Brennan*. Department of Optometry and Vision Sciences, University of Melbourne, and. *Brennan Consultants Pty Ltd., Melbourne, Australia. ABSTRACT. Purpose: To provide empirical data of letter CSF for various levels of defocus under controlled
The Contrast Sensitivity Function (CSF) and Image Discrimination. Eli Peli. Schepens Eye Research Institute, Harvard Medical School, Boston, MA 02114 and. New England Eye Center, Tufts University School of Medicine, Boston, MA 02111. Abstract. In a previous study the simulation of image appearance from different
Contrast sensitivity of the human eye and its effects on image quality. Barten, P.G.J.. DOI: 10.6100/IR523072. Published: 01/01/1999. Document Version. Publisher's PDF, also known as Version of Record (includes final page, issue and volume numbers). Please check the document version of this publication: • A submitted
resolutions (spatial frequencies) provides a more comprehen- sive evaluation of spatial visual function than does visual acuity which, it should be remembered, is in effect a measure of contrast sensitivity for the smallest target the observer can identify. Secondly, the contrast sensitivity function appeared to be subserved by a
19 Dec 2017 Full-text (PDF) | Citation J. G. ROBSON, "Spatial and Temporal Contrast-Sensitivity Functions of the Visual System," J. Opt. Soc. Am. 56, 1141-1142 (1966) www.opticsinfobase.org/josa/abstract.cfm?URI=josa-56-8-1141.
unreasonable. Shape of the Luminance Contrast Sensitivity Function. In Figure 5.1 is a typical CSF for a normal human observer, obtained for static, luminance-varying gratings with central fixation at a photopic light level. It can be seen that the highest sensitivity is in the mid spatial frequency range, around. 2-6 c/deg, with a
measured with the different tests may not depict the quality of visual function when one starts to use the tests. The same was true when high contrast visual acuity tests began to be used. The combination of high and low contrast visual acuity values defines the location of the slope of the contrast sensitivity curve but diagnosti
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