Accuracy of color scission for spectral transparencies

Abstract

When surfaces are overlaid by a transparent filter, color scission refers to the perceptual separation of the colors of the image into the colors of the underlying surface and the color of the overlaying layer. We used filter matching to measure the accuracy of color scission for simulated physical filters and materials. Standard filters were placed on various sets of chromatic materials and match filters on achromatic materials. In the majority of cases, filter matching was close to veridical. The spectral effects of filters are complex, but with respect to the visual system, they can be closely approximated by 3-D affine transformations of cone absorptions or chromaticities. Veridical filter matches can be predicted by neural strategies that match ratios of mean cone absorptions or match mean chromatic contrasts between filtered and exposed regions. However, when the shape of a filter transmittance differed significantly from the shapes of background reflectances, the overlaid region had lower saturation than the surround, and filter matches had broader transmittance spectra than veridical.

Transparency perception: the key to understanding simultaneous color contrast

“…Note also that the prediction derived for the HSB-α condition is based on the premise that the average color is identical for both surrounds, which was the case in the present study. In other studies, where the surrounds have different average colors [36,37], this particular prediction does not apply.…”

Transparent layer constancy is improved by motion, stereo disparity, highly regular background pattern, and successive presentation

“…This variability in the degree of constancy was also found in the few studies investigating the case of transparent layer constancy. This holds for the achromatic domain (Gerbino, Stultiens, Troost, & de Weert, 1990;Robilotto & Zaidi, 2004) and also in the general case of chromatic transparent layer constancy (Khang & Zaidi, 2002a, 2002bFaul & Ekroll, 2012;Faul & Falkenberg, 2015), on which we focus in the present investigation.…”

The role of scission in the perception of color and opacity

“…Despite a number of noteworthy exceptions (cf. Chen & D'Zmura, 1998;D'Zmura, Colantoni, Knoblauch, & Laget, 1997;Khang & Zaidi, 2002), the vast majority of research into perceived transparency has used achromatic stimuli and focused on conditions that support "balanced" transparency (i.e., conditions in which the transparent surface has a uniform transmittance and color). However, our laboratory introduced a class of achromatic displays that evoke percepts in which the transparent layer appears to vary continuously in opacity (Anderson, 1999(Anderson, , 2003Anderson & Winawer, 2005, 2008 see Figure 2).…”