Schirillo J A, Shevell S K
Department of Psychology, University of Chicago, IL 60637, USA.
Vision Res. 1996 Jun;36(12):1783-96. doi: 10.1016/0042-6989(95)00217-0.
The luminance of a test within an inhomogeneous ("checkerboard") surround was adjusted to match the brightness of a comparison patch within a uniform surround. All stimuli were achromatic. Both surrounds had the same space-averaged luminance. With an incremental comparison patch, a test-within-checkerboard at a luminance between the luminances of the brighter and dimmer checks appears dimmer than if viewed within the uniform surround. A decremental comparison patch, however, is matched by a test luminance that is little affected by the inhomogeneity of the surround. In general, the brightness of the test is mediated neither by the space-averaged luminance of an inhomogeneous surround, nor by any equivalent uniform surround, regardless of luminance. We consider alternative models for the brightness of a region that is neither strictly an increment nor decrement with respect to contiguous surrounding surfaces.
将非均匀（“棋盘格”）背景中测试区域的亮度进行调整，使其与均匀背景中比较色块的亮度相匹配。所有刺激均为消色差的。两种背景具有相同的空间平均亮度。对于增量比较色块，处于棋盘格背景中、亮度介于较亮和较暗方格亮度之间的测试区域，与在均匀背景中观察相比显得更暗。然而，对于减量比较色块，与之匹配的测试亮度受背景不均匀性的影响较小。一般来说，测试区域的亮度既不由非均匀背景的空间平均亮度介导，也不由任何等效的均匀背景介导，无论其亮度如何。我们考虑了关于一个区域亮度的替代模型，该区域相对于相邻周围表面既不是严格的增量也不是严格的减量。
