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Analysis of discrimination threshold on the tritan axis
Author(s) -
García J. A.,
Yebra A.,
Hita E.,
Romero J.
Publication year - 2001
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.2001.00554.x
Subject(s) - luminance , constant (computer programming) , optics , mathematics , physics , psychology , computer science , programming language
Summary Discrimination thresholds on the tritan axis were obtained for an extensive group of 66 stimuli: in some of the stimuli, S ‐cone trolands were held constant by keeping the product of the S ‐cone excitation level and the luminance unchanged, while in others only the luminance was changed to establish various S ‐cone troland values. These thresholds depended clearly on the S ‐cone value of the stimuli, while they remained almost constant against the retinal illumination. Thus, we noted that the excitation of the L −2 M channel had practically no influence over the discrimination threshold on the tritan axis, although this independence of Δ S from L −2 M was not so obvious when the S value was high. With our data, we performed different fits, and found that the fit including the terms S ,( L −2 M ) and( L + M ) adapted better to our results.