Depth from Binocular Half-Occlusions in Stereoscopic Images of Natural Scenes
Depth from Binocular Half-Occlusions in Stereoscopic Images of Natural Scenes
复制标题
自然场景立体图像中双眼半遮挡的深度
作者：
L. Wilcox;Deepak Lakra
在过去的二十年里，心理物理学实验已经确定双目半遮挡是人类视觉系统的有用信息来源。现有的文献集中在简化的刺激，没有额外的线索，深度，除了立体视觉。从这个庞大的身体的工作，我们可以相信，视觉系统是能够利用双目半闭塞，以帮助深度知觉，但是，我们不知道如果这个信号有任何影响知觉时，观察者认为复杂的立体刺激与多个来源的深度信息。这个问题在这里解决与使用的自然场景，其中一些已被数字化修改，以操纵一个主要的半遮挡信号的立体图像。我们的研究结果表明，这些相对复杂的刺激的深度排序的判断显着影响的性质的半遮挡信号，但只有当高度纹理的表面被视为。在这样的条件下，用背景纹理替换双目半遮挡相对于被遮挡区域与前景对象一致时的性能减慢了反应时间。这个结果是特定的条件时，深度排序是正确的（即不颠倒），并取决于半闭塞的大小。半遮挡信息在存在诸如透视、纹理梯度、阴影和插入等有效深度线索的情况下的影响是令人信服的证据，该信息在人类深度感知中起着重要作用。
Over the past two decades psychophysical experiments have firmly established that binocular half-occlusions are useful sources of information for the human visual system. The existing literature has focused on simplified stimuli that have no additional cues to depth, apart from stereopsis. From this large body of work we can be confident that the visual system is able to exploit binocular half-occlusions to aid depth perception; however, we do not know if this signal has any influence on perception when observers view complex stereoscopic stimuli with multiple sources of depth information. This issue is addressed here with the use of stereoscopic images of natural scenes, some of which have been digitally altered to manipulate a major half-occlusion signal. Our results show that depth-ordering judgments for these relatively complex stimuli are significantly affected by the nature of the half-occlusion signal, but only when highly textured surfaces are viewed. Under such conditions, the replacement of a binocular half-occlusion with background texture slows reaction time relative to performance when the occluded region is consistent with the foreground object. This result is specific to conditions when the depth ordering is correct (ie not reversed) and depends upon the size of the half-occlusion. The influence of the half-occlusion information in the presence of potent depth cues such as perspective, texture gradient, shading, and interposition is convincing evidence that this information plays a significant role in human depth perception.
遮挡连接不会提高立体视度。
DOI：
10.1163/15685680152692006
发表时间：
2001
期刊：
Spatial vision.
影响因子：
--
作者：
vanEe,R;Anderson,BL;Farid,H
通讯作者：
Farid,H