Limits of stereopsis explained by local cross-correlation.
Limits of stereopsis explained by local cross-correlation.
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DOI：
10.1167/9.1.8
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发表时间：
2009-01-12
影响因子：
1.8
通讯作者：
Banks MS
中科院分区：
文献类型：
--
作者：
Filippini HR;Banks MS
人类的立体视觉有两个众所周知的限制：视差梯度限制，这是无法感知深度时，在一个区域内的差异变化太大，和立体分辨率的限制，这是无法感知空间差异的变化，发生在太细的空间尺度。我们建议，这两个限制可以被理解为副产品的估计视差通过互相关的两个眼睛的图像，基本计算的基础上的视力-能量模型。为了验证这一建议，我们构建了一个具有生物学动机的局部互相关模型。然后，我们在相同的心理物理任务中比较了模型和人类的行为。该模型和人类的行为非常相似：他们都表现出差异梯度限制，并且具有相似的立体分辨率阈值。性能受到类似的各种刺激参数的变化。通过模拟刺激模糊和使用不同大小的图像块的影响，我们发现人类用来估计视差的最小神经机制的证据是直径为3-6弧分。我们得出结论，清晰度梯度限制和立体分辨率确实是使用局部互相关估计视差的副产品。
Human stereopsis has two well-known constraints: the disparity-gradient limit, which is the inability to perceive depth when the change in disparity within a region is too large, and the limit of stereoresolution, which is the inability to perceive spatial variations in disparity that occur at too fine a spatial scale. We propose that both limitations can be understood as byproducts of estimating disparity by cross-correlating the two eyes’ images, the fundamental computation underlying the disparity-energy model. To test this proposal, we constructed a local cross-correlation model with biologically motivated properties. We then compared model and human behaviors in the same psychophysical tasks. The model and humans behaved quite similarly: they both exhibited a disparity-gradient limit and had similar stereoresolution thresholds. Performance was affected similarly by changes in a variety of stimulus parameters. By modeling the effects of stimulus blur and of using different sizes of image patches, we found evidence that the smallest neural mechanism humans use to estimate disparity is 3–6 arcmin in diameter. We conclude that the disparity-gradient limit and stereoresolution are indeed byproducts of using local cross-correlation to estimate disparity.
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影响因子：
5.5
作者：
BLAKEMORE, C
通讯作者：
BLAKEMORE, C
影响因子：
1.8
作者：
Hillis, JM;Banks, MS
通讯作者：
Banks, MS
影响因子：
5.3
作者：
Nguyenkim, JD;DeAngelis, GC
通讯作者：
DeAngelis, GC
影响因子：
5.5
作者：
CAMPBELL, FW;ROBSON, JG
通讯作者：
ROBSON, JG
DOI：
10.1364/josaa.8.001775
发表时间：
1991-11-01
影响因子：
1.9
作者：
BANKS, MS;SEKULER, AB;ANDERSON, SJ
通讯作者：
ANDERSON, SJ