Tracking by Location and Features: Object Correspondence Across Spatiotemporal Discontinuities During Multiple Object Tracking
Tracking by Location and Features: Object Correspondence Across Spatiotemporal Discontinuities During Multiple Object Tracking
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DOI：
10.1037/a0033117
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发表时间：
2014-02-01
影响因子：
2.1
通讯作者：
Huff, Markus
中科院分区：
文献类型：
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作者：
Papenmeier, Frank;Meyerhoff, Hauke S.;Huff, Markus
我们研究了是否利用表面特征信息来跟踪多个对象的位置。特别是，我们测试了表面特征和时空信息是否根据其可用性和可靠性进行加权。因此，我们假设表面特征应该会影响时空不连续性的位置跟踪。在五个实验中实现了三种时空不连续性：突然的场景旋转，突然的缩放和降低的演示帧速率。物体在时空不连续处被短暂地着色。与均匀着色相比，在不连续性上匹配时空信息的不同着色提高了跟踪性能。在不连续处交换不同的颜色会损害性能。通过颜色的对应进一步证明了更多的错误选择的干扰出现在前目标颜色比干扰出现在前干扰颜色的交换条件。这是真的，即使颜色从来没有支持跟踪，当参与者被指示忽略颜色。此外，目标颜色对跟踪的影响发生在不可靠的时空信息，而不是可靠的时空信息。我们的研究结果表明，表面特征信息可以用来跟踪多个对象的位置。这与仅基于时空信息来跟踪对象的理论相反。我们引入了一个灵活的加权跟踪帐户，说明时空信息和表面特征都利用的位置跟踪机制。这两个信息来源根据其可用性和可靠性进行加权。当不同的表面特征信息可用并且时空信息不可靠时，表面特征对跟踪的影响特别可能。
We examined whether surface feature information is utilized to track the locations of multiple objects. In particular, we tested whether surface features and spatiotemporal information are weighted according to their availability and reliability. Accordingly, we hypothesized that surface features should affect location tracking across spatiotemporal discontinuities. Three kinds of spatiotemporal discontinuities were implemented across five experiments: abrupt scene rotations, abrupt zooms, and a reduced presentation frame rate. Objects were briefly colored across the spatiotemporal discontinuity. Distinct coloring that matched spatiotemporal information across the discontinuity improved tracking performance as compared with homogeneous coloring. Swapping distinct colors across the discontinuity impaired performance. Correspondence by color was further demonstrated by more mis-selected distractors appearing in a former target color than distractors appearing in a former distractor color in the swap condition. This was true even when color never supported tracking and when participants were instructed to ignore color. Furthermore, effects of object color on tracking occurred with unreliable spatiotemporal information but not with reliable spatiotemporal information. Our results demonstrate that surface feature information can be utilized to track the locations of multiple objects. This is in contrast to theories stating that objects are tracked based on spatiotemporal information only. We introduce a flexible-weighting tracking account stating that spatiotemporal information and surface features are both utilized by the location tracking mechanism. The two sources of information are weighted according to their availability and reliability. Surface feature effects on tracking are particularly likely when distinct surface feature information is available and spatiotemporal information is unreliable.