%0 Journal Article
%T Sistema visual humano: evid¨ºncia psicof¨ªsica para filtros de freq¨¹¨ºncia angular baixa
%A Santos
%A Natanael Antonio dos
%A Simas
%A Maria L¨²cia de Bustamante
%A Nogueira
%A Renata Maria Toscano Barreto Lyra
%J Estudos de Psicologia (Natal)
%D 2005
%I Universidade Federal do Rio Grande do Norte
%R 10.1590/S1413-294X2005000100012
%X the aim of this work was to measure narrow-band frequency response curves for four angular frequency filters whose test frequencies were 1, 2, 3 and 4 cycles/360o. five human observers with normal or corrected visual acuity measured nine curves for each filter with a supra-threshold response summation psychophysical method allied within a forced-choice method. the results showed maximum summation effects at test frequency for filters 1, 2, 3 and 4 cycles/360o surrounded on both sides by strong inhibition. these results are consistent with the existence of narrow-band angular frequency filters operating in human visual system either through summation or inhibition of specific low angular frequency ranges.
%K visual perception of form
%K angular frequency filter
%K angular frequency
%K supra-threshold summation method.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1413-294X2005000100012&lng=en&nrm=iso&tlng=en