Additivity failures in mesopic brightness matching.

Mesopic models*/from brightness matching to visual performance in night-time driving: a review

Additivity in the tetrachromatic colour matching system.

The trichromatic system of measurement. although suitable for fields subtending around 2 . does not give a linear metric with larger fields because of the presence of rod receptors. Their presence is allowed for in the tetrachromatic colour match and so one might expect the tetracllromatic system to be more linear. it is the purpose of this paper to test this by compariq tetra~hromatie and tric...

Philosophical Perspectives, 20, Metaphysics, 2006 FAILURES TO ACT AND FAILURES OF ADDITIVITY∗

Centering biases in heterochromatic brightness matching

When the method of constant stimuli is used to measure heterochromatic brightness matches, the resulting matches can be strongly biased toward the center of the range of test luminances used. In the present paper, we investigate the source of this centering bias. The stimuli were 2 degrees red squares presented in a gray surround. In the main experiments, two ranges of stimulus luminance were p...

The development of a mesopic spectral sensitivity curve based on visual observation , and the question of spectral additivity in the mesopic luminance region PhD thesis extract

The aim of the research was to establish an appropriate detection contrast metric in the mesopic luminance range which solves the problem of non-additivity by taking the influence of the chromatic channels into account. Based on several experiments at 10° and 20° eccentricity, and further theoretical modeling the CHC2 contrast metric was constructed, which takes the influence of the chromatic c...