Contrast Energy and Contour Interaction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73597294" target="_blank" >RIV/61989592:15310/19:73597294 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.lww.com/optvissci/Abstract/2019/12000/Contrast_Energy_and_Contour_Interaction.9.aspx" target="_blank" >https://journals.lww.com/optvissci/Abstract/2019/12000/Contrast_Energy_and_Contour_Interaction.9.aspx</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1097/OPX.0000000000001457" target="_blank" >10.1097/OPX.0000000000001457</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Contrast Energy and Contour Interaction

Popis výsledku v původním jazyce

PURPOSE The discrimination of acuity targets is impaired by the presence of nearby flanking contours, a phenomenon known as contour interaction. METHODS In this study, we measured percent correct identification for threshold size, high-contrast Sloan letters at the fovea and at 5 degrees in the inferior visual field for different combinations of flanking-bar width, and Weber contrast corresponding to specific fixed values of contrast energy (width x contrast, in %-min arc). RESULTS For flanking bars with low-contrast energy, contour interaction exhibited no systematic dependence on the flanking-bar width. However, when the flanking bars had higher contrast energy, narrower high-contrast bars produced significantly greater contour interaction than wider bars of lower contrast. CONCLUSIONS The results are consistent with the interpretation that contour interaction depends primarily on the contrast energy of flanking contours when their contrast energy is low. As the contrast energy of the flanking contours increases, the magnitude of contour interaction depends on the flanker contrast. For high-contrast flanking contours, the magnitude of contour interaction saturates when the width of the flanking contours is approximately 20% of letter size.

Název v anglickém jazyce

Contrast Energy and Contour Interaction

Popis výsledku anglicky

PURPOSE The discrimination of acuity targets is impaired by the presence of nearby flanking contours, a phenomenon known as contour interaction. METHODS In this study, we measured percent correct identification for threshold size, high-contrast Sloan letters at the fovea and at 5 degrees in the inferior visual field for different combinations of flanking-bar width, and Weber contrast corresponding to specific fixed values of contrast energy (width x contrast, in %-min arc). RESULTS For flanking bars with low-contrast energy, contour interaction exhibited no systematic dependence on the flanking-bar width. However, when the flanking bars had higher contrast energy, narrower high-contrast bars produced significantly greater contour interaction than wider bars of lower contrast. CONCLUSIONS The results are consistent with the interpretation that contour interaction depends primarily on the contrast energy of flanking contours when their contrast energy is low. As the contrast energy of the flanking contours increases, the magnitude of contour interaction depends on the flanker contrast. For high-contrast flanking contours, the magnitude of contour interaction saturates when the width of the flanking contours is approximately 20% of letter size.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30207 - Ophthalmology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

OPTOMETRY AND VISION SCIENCE

ISSN

1040-5488

e-ISSN

—

Svazek periodika

96

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

940-947

Kód UT WoS článku

000504871500009

EID výsledku v databázi Scopus

2-s2.0-85076460319