6533b7d3fe1ef96bd1261467

RESEARCH PRODUCT

Spatio-temporal Contrast Sensitivity in the Cardinal Directions of the Colour Space. A Review

Pascual CapillaMaría Amparo Díez-ajenjo

subject

genetic structuresmedia_common.quotation_subjectReviewVisual systempatrones espacio-temporalesLuminanceCorrelationcolour spacecaminos visualeslcsh:OphthalmologyPsychophysicslcsh:QC350-467Contrast (vision)direcciones cardinalesSensitivity (control systems)media_commoncontrast sensitivitybusiness.industrycardinal directionsPattern recognitionvisual pathwayssensibilidad al contrastelcsh:RE1-994spatio-temporal patternsespacio de colorArtificial intelligencebusinessFocus (optics)Psychologylcsh:Optics. LightOptometryCardinal direction

description

AbstractWe review the psychophysics of the spatio-temporal contrast sensitivity in the cardinal directions of the colour space and their correlation with those neural characteristics of the visual system that limit the ability to perform contrast detection or pattern-resolution tasks. We focus our attention particularly on the influence of luminance level, spatial extent and spatial location of the stimuli - factors that determine the characteristics of the physiological mechanisms underlying detection. Optical factors do obviously play a role, but we will refer to them only briefly. Contrast sensitivity measurements are often used in clinical practice as a method to detect, at their early stages, a variety of pathologies affecting the visual system, but their usefulness is very limited due to several reasons. We suggest some considerations about stimuli characteristics that should be taken into account in order to improve the performance of this kind of measurement.

https://doi.org/10.3921/joptom.2010.2