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首页> 外文期刊>Journal of vision >Perceptual dimensions underlying lightness perception in homogeneous center-surround displaysSchmid & Anderson
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Perceptual dimensions underlying lightness perception in homogeneous center-surround displaysSchmid & Anderson

机译：Schmid＆Anderson在均匀的中心环绕显示器中感知亮度的感知维度

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Lightness judgments of targets embedded in a homogeneous surround exhibit abrupt steps in perceived lightness at points at which the targets transition from being increments to decrements. This “crispening effect” and the general difficulty of matching low-contrast targets embedded in homogeneous surrounds suggest that a second perceptual dimension in addition to lightness may contribute to the appearance of test patches in these displays. The present study explicitly tested whether two dimensions (lightness and transmittance) could lead to more satisfactory matches than lightness alone in an asymmetric matching task. We also examined whether transmittance matches were more strongly associated with task instructions that had observers match perceived transparency or the perceived edge contrast of the target relative to the surround. We found that matching target lightness in a homogeneous display to that in a textured or rocky display required varying both lightness and transmittance of the test patch on the textured display to obtain the most satisfactory matches. However, observers primarily varied transmittance when instructed to match the perceived contrast of targets against homogeneous surrounds, but not when instructed to match the amount of transparency perceived in the displays. The results suggest that perceived target–surround edge contrast differs between homogeneous and textured displays. Varying the midlevel property of transparency in textured displays provides a natural means for equating both target lightness and the unique appearance of the edge contrast in homogeneous displays.
机译：嵌入均匀周围环境中的目标的亮度判断在目标从增量过渡到递减的点显示出感知亮度的突变。这种“渐隐效应”和匹配嵌入均匀周围环境中的低对比度目标的一般困难表明，除了亮度之外，第二个感知维度可能会导致这些显示器中测试贴片的出现。本研究明确测试了在不对称匹配任务中，二维（亮度和透射率）是否比单独的亮度会导致更令人满意的匹配。我们还检查了透射率匹配与任务指示是否紧密相关，任务指示使观察者匹配目标的透明度或目标相对于周围环境的边缘对比度。我们发现，要使均质显示器中的目标亮度与带纹理或岩石显示器中的目标亮度相匹配，需要同时改变带纹理的显示器上测试贴片的亮度和透光率，以获得最令人满意的匹配度。然而，当指示观察者将目标的感知对比度与均匀的周围环境相匹配时，观察者主要改变透射率，而当指示使显示器中感知的透明程度相匹配时，观察者则不会改变透射率。结果表明，均质和纹理显示之间感知到的目标与周围边缘的对比度有所不同。改变带纹理的显示器的透明性的中层特性，提供了一种自然的手段，可以使目标亮度和均质显示器中边缘对比度的独特外观均等。

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