Pictorial depth cues: a new slant.
Pictorial depth cues: a new slant.
复制标题
DOI：
10.1364/josaa.12.000017
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
G. Lee Zimmerman;Gordon E. Legge;Patrick Cavanagh
中科院分区：
文献类型：
--
作者：
G. Lee Zimmerman;Gordon E. Legge;Patrick Cavanagh
透视投影、纵横比和纹理梯度等图像深度线索可以在数学上指定平面的倾斜度。我们进行了实验来测量人类根据这些线索感知表面倾斜的准确性。我们根据嵌入表面的一对正交线的相对长度的判断来计算感知的倾斜度。我们的结果表明，倾斜判断的准确度在 3 度以内。无论线索是亮度差异还是等亮度色差，都能达到这种准确度。我们没有发现吉布森 [J.J.吉布森，《视觉世界的感知》（Houghton Mifflin，波士顿，马萨诸塞州，1950 年]）等。我们确实发现了证据表明受试者无法对不相连的表面进行准确的深度估计。这可能是我们的措施与吉布森等人的措施之间存在差异的根源。这项研究与之前的发现相结合，支持一种涉及至少两种甚至更多空间表示的感知模型：一种主要源自图像线索的表面方向的局部真实表示，以及主要源自双眼视差和运动视差的以观察者为中心的距离的另一种全局表示。
Pictorial depth cues such as perspective projection, aspect ratio, and texture gradients can specify mathematically the slant of a planar surface. We performed experiments to measure the accuracy of human perception of surface slant from these cues. We calculated the perceived slant from judgments of the relative lengths of a pair of orthogonal lines embedded in the surface. Our results indicate that slant judgments are accurate to within 3 deg. This level of accuracy was achieved whether the cues were luminance differences or equiluminous color differences. We found no evidence of the recession to the frontal plane that has been reported by Gibson [J.J. Gibson, The Perception of the Visual World (Houghton Mifflin, Boston, Mass., 1950]) and others. We did find evidence suggesting that subjects do not make accurate depth estimates of disconnected surfaces. This may be the source of the discrepancy between our measures and those of Gibson and others. This research, combined with previous findings, supports a model of perception that involves at least two and possibly more representations of space: one local veridical representation of surface orientation derived primarily from pictorial cues and another global representation of observer-centered distance derived primarily from binocular disparity and motion parallax.