When is spatial filtering enough? Investigation of brightness and lightness perception in stimuli containing a visible illumination component.

ABSTRACT: Brightness (perceived intensity) and lightness (perceived reflectance) matching were investigated in seven well-known visual stimuli that contain a visible shadow or transparent overlay. These stimuli are frequently upheld as evidence that low-level spatial filtering is inadequate to explain brightness/lightness illusions and that additional mid- or high-level mechanisms are required. The argument in favor of rejecting low-level spatial filtering explanations has been founded on the erroneous assumption that equating test patch and near surround luminance is sufficient to control for and rule out this type of mechanism. We tested this idea by comparing the matching behavior of four observers to the predictions of the ODOG multiscale filtering model (Blakeslee & McCourt, 1999). Lightness an

SUBMITTER: Blakeslee B 

PROVIDER: S-EPMC3340531 | biostudies-literature | 2012 May

REPOSITORIES: biostudies-literature