title: A retinal smear technique for varying grating contrast.
abstract: We present here a technique for modulating contrast in gratings seen in Maxwellian-view or on a projection screen. The method can be used with achromatic or chromatic grating stimuli. It is based on a high frequency oscillatory displacement of the grating image, which in turn produces a smearing of the image on the observer's retina. The waveform of the displacement and its amplitude determine the appearance and contrast of the image produced on the retina.
authors: Department of Psychology, State University of New York, Stony Brook 11794.
authors: H M
authors: HM
authors: Petry
authors: K
authors: K
authors: Knoblauch
authors: R K
authors: RK
authors: Moore
authors: L A
authors: LA
authors: Riggs
mesh_terms: D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008722:Methods; D008959:Models, Neurological; D055095:Optics and Photonics; D010364:Pattern Recognition, Visual / Q000502:physiology*; D012160:Retina / Q000502:physiology*