Lightness, embeddedness, and contrast.
D000328:Adult; D003118:Color Perception; D005260:Female; D005556:Form Perception; D007839:Functional Laterality; D006801:Humans; D007600:Judgment; D008029:Lighting; D008297:Male; D009799:Ocular Physiological Phenomena; D009949:Orientation; D014785:Vision, Ocular; D014796:Visual Perception