Logvinenko A, Menshikova G
School of Psychology, Queen's University of Belfast, UK.
Perception. 1994;23(9):1007-23. doi: 10.1068/p231007.
The albedo hypothesis was tested under apparent transformations of perceived illumination and achromatic colour induced by pseudoscopic inversion of apparent depth. Looking through a pseudoscope made a cone attached to a vertical white screen look like a conical hole in the screen. This in turn caused the shadow which the now 'invisible' cone cast on the screen to change its appearance and to look like a darkly pigmented area. The darkness of the shadow before the pseudoscopic reversal and greyness of colour afterwards were measured by means of psychophysical scales for darkness and greyness set by the bisection method. Contrast of the shaded area was varied from 0.17 to 0.96 in 7 steps, the mean illuminance of the screen having been maintained at 40 1x. Although the albedo hypothesis in its classical form was not confirmed, it was found that darkness of shadow varied linearly in inverse proportion to greyness of colour within the entire contrast range. This is in agreement with the hypothesis that achromatic colour and perceived illumination are inversely proportional to each other while the retinal illumination is constant.
在由视深度的假透视反转所诱导的感知照明和消色差颜色的明显变化下，对白化病假说进行了测试。通过假透视镜观察时，附着在垂直白色屏幕上的圆锥体看起来像是屏幕上的一个圆锥孔。这反过来又导致现在“不可见”的圆锥体投射在屏幕上的阴影改变其外观，看起来像一个深色区域。假透视反转前阴影的暗度和之后颜色的灰度是通过用二等分法设定的暗度和灰度心理物理量表来测量的。阴影区域的对比度以7个步骤从0.17变化到0.96，屏幕的平均照度保持在40勒克斯。虽然经典形式的白化病假说没有得到证实，但发现在整个对比度范围内，阴影的暗度与颜色的灰度成反比线性变化。这与消色差颜色和感知照明在视网膜照度恒定时相互成反比的假说一致。
