The optical-geometrical characteristics and thresholds of perception of fragmented outline figures.
Neurosci Behav Physiol
; 35(1): 83-7, 2005 Jan.
Article
em En
| MEDLINE
| ID: mdl-15739791
ABSTRACT
Measurements were made of the threshold of recognition of cumulatively forming line figures. The threshold value of the outline, expressed in pixels, depended on the length of the outline of the whole unfragmented figure. Relative threshold values were constant, and for the measures of figure fragments used in the present study, averaged 12.5%. A spatial frequency analysis of the test images was performed. Variation of the amplitude-frequency parameters of the spectra of the images of various figures with threshold fragmentation was minimal as compared with the variation of these parameters in figures with subthreshold or suprathreshold levels of fragmentation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Reconhecimento Visual de Modelos
/
Limiar Sensorial
/
Campos Visuais
/
Percepção de Forma
Tipo de estudo:
Prognostic_studies
Limite:
Adolescent
/
Adult
/
Child
/
Humans
/
Middle aged
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article