Why the contrast function slope is important

Marta Maneiro; Maria L. F. de Mattiello

doi:10.1117/12.437204

14 August 2001 Why the contrast function slope is important

Marta Maneiro, Maria L. F. de Mattiello

Proceedings Volume 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications; (2001) https://doi.org/10.1117/12.437204
Event: IV Iberoamerican Meeting of Optics and the VII Latin American Meeting of Optics, Lasers and Their Applications, 2001, Tandil, Argentina

Abstract

The aim of this study was to investigate spatial-frequency at threshold and supra-threshold levels in both normal and open-angle glaucomatous observers. It has been shown that for grating, stimuli contrast detection depends on spatial frequency, level of illumination and condition of the observer, variables which are analyzed by using psychometric functions of contrast in four different spatial frequencies - 6, 7, 9 and 18 cycles per degree - and with photopic and mesopic luminance equal to 15 and 5 cad/m2, respectively. The analysis allows for the study for the circumstances and ranges in which contrast perception exhibits a linear exponent.

Citation Download Citation

Marta Maneiro and Maria L. F. de Mattiello "Why the contrast function slope is important", Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); https://doi.org/10.1117/12.437204

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