title: Spatial frequency-contingent color aftereffects.
abstract: Two-dimensional Fourier analysis of checkerboards reveals that major components are at a 45 degree angle to the check edges. After adapting to chromatic checkerboards, subjects who viewed achromatic grating stimuli reported that complementary color aftereffects are aligned with spatial frequency components rather than with the edges in the pattern.
mesh_terms: D000221:Adaptation, Ocular; D003118:Color Perception / Q000502:physiology*; D005556:Form Perception / Q000502:physiology*; D005583:Fourier Analysis; D009903:Optical Illusions / Q000502:physiology