Mach Band Attenuation by Adjacent Stimuli
نویسنده
چکیده
Mach bands are illusory bright am! da.rk bands seen where a lumin<lnce plateau meets <I ramp, as in half-shadows or penumbras. Ra.tliff, Milkman, and Kaufman (1983) showed that Mach bands are attenmtted by placing stimuli, such as bars, nemby. An experiment comparing Mach band attenuation for bar a.ncl Craik-O'Brien stimuli shows that they are equally effective in attenuating Mach bands. 'J'he results suggest that the high-frequency components of a. stimulus adjacent to a ramp are responsible for the attenua.tion. 'I'hc findings are interpreted in terms of a. recent filling-in model of hrightrwss perception and the results of computer simulations of stimuli used by Ratliff et al and the present experiment are shown. Key wonls: Mach bands, brightness, filling-in Running head: Mach ba.nd a.ttenua,t,ion by adjacent Btirnuli
منابع مشابه
Attenuation of Mach bands by adjacent stimuli.
Pronounced bright and dark bands are seen at the bright and dark edges of half-shadows and similar distributions of illumination. These are the so-called Mach bands. A pair of vertical Mach bands was generated with a ramp pattern in the central strip of a horizontal tripartite oscilloscope display. This pattern consisted of two uniform fields (one of low luminance, one of high luminance) joined...
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