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首页> 外文期刊>Journal of vision >Large individual differences in the weighting of perspective and stereoscopic information in slant perception; implications for cue combination approaches.
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Large individual differences in the weighting of perspective and stereoscopic information in slant perception; implications for cue combination approaches.

机译：在偏见中，视角和立体信息的权重存在很大的个体差异;对提示组合方法的影响。

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摘要

Previously unpublished individual data are presented for 12 participants in a cue conflict experiment (Gillam 1967). Stimuli were three frontal plane perspective patterns of dotted lines. Visual angle extents were 15 deg (H) and 9 deg (V). Distance was 56 cm. One pattern had equally-spaced vertical lines, one equally-spaced horizontal lines and the other a combination (grid). Stereoscopic slants around a vertical axis ranging from 4 to 33 deg. were imposed by uniocular horizontal magnification using aniseikonic lenses, creating conflict with the frontal plane perspective. A monocular comparator, validated using full cue slants, recorded perceived slant. Participants were screened for stereoacuity (30 arcsec.) Results and discussion. (a) Individual differences were reliable and large, ranging from stereopsis having all the weight to having only moderate weight. For 4 observers data were close to the predicted stereo response function regardless of pattern. For the observers who showed an effect of conflicting perspective, horizontal lines (linear perspective) reduced perceived slant much more than vertical lines (foreshortening) with an intermediate effect for the grid. (b) Four observers showed this pattern of attenuation across stereo slants, while four only at greater stereo slants. Thus contrary to other studies, increasing conflict tended to reduce rather than increase the influence of stereo. (c) The fact that the two components of perspective compression, foreshortening and linear perspective, received very different weights, suggests that reported weightings in the literature of broadly-defined "cues" such as "texture" may lack generality. (d) Adding the two components of perspective via the grid pattern did not increase the weight given to perspective but the weight given to stereopsis. Even though the dotted lines all provided ample potential stereo information, configuration influenced stereo dominance. Thus stereo should not be regarded as a modular slant cue.
机译：先前未公开的个人数据是针对一个提示冲突实验（Gillam 1967）中的12位参与者提供的。刺激是虚线的三个正面平面透视图。视角范围是15度（H）和9度（V）。距离为56厘米。一种模式具有等距的垂直线，一种模式具有等距的水平线，另一种具有组合（网格）。绕着4到33度的垂直轴的立体倾斜。是通过使用反正视透镜的单眼水平放大倍数施加的，这与额面透视产生了冲突。使用全提示倾斜进行验证的单眼比较器记录了感知到的倾斜。筛选参与者的立体视力（> 30 arcsec。）结果并进行讨论。 （a）个体差异是可靠的并且很大，范围从具有所有体重的立体视到仅有中等体重。对于4个观察者，无论模式如何，数据均接近于预测的立体声响应函数。对于观察者而言，显示出相互矛盾的透视效果，水平线（线性透视）比垂直线（缩短）减少了明显的倾斜感，对网格产生了中间影响。 （b）四个观察者在整个立体声倾斜上显示出这种衰减模式，而四个观察者仅在更大的立体声倾斜上显示。因此，与其他研究相反，冲突的增加倾向于减少而不是增加立体声的影响。 （c）透视压缩的两个组成部分，即透视透视和线性透视，权重相差很大，这表明在文献中报道的诸如“纹理”之类的广义“线索”的权重可能缺乏普遍性。 （d）通过网格图案添加透视图的两个分量并不会增加透视图的权重，而是增加了立体视的权重。即使虚线都提供了足够的潜在立体声信息，但配置影响了立体声优势。因此，立体声不应视为模块化的倾斜提示。

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