View‐invariant object recognition ability develops after discrimination, not mere exposure, at several viewing angles
View‐invariant object recognition ability develops after discrimination, not mere exposure, at several viewing angles
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DOI：
10.1111/j.1460-9568.2009.07057.x
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发表时间：
2010-01
影响因子：
3.4
通讯作者：
Wakayo Yamashita;G. Wang;Keiji Tanaka
中科院分区：
文献类型：
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作者：
Wakayo Yamashita;G. Wang;Keiji Tanaka
当必须将不熟悉的物体与类似的干扰物体区分开来时，人们通常无法通过视角的变化来识别该物体。先前的工作表明，经过长期辨别从同一视角看到的一组物体的经验，在视角变化 30-60° 的情况下立即识别物体成为可能。视角不变物体识别的能力应该在视角内辨别过程中发展，其中包括两种体验：看到单独的视角和辨别物体。本研究的目的是确定每个因素对视图不变物体识别能力发展的相对贡献。猴子首先接受了一项需要对多组物体进行视图不变物体识别（物体任务）的任务的广泛训练。然后，在 26 天的时间里，动物们在两项准备任务中的一项中暴露于一组新的物体：一项任务是单独观看每个物体视图，第二项任务需要在四个视角中的每一个角度区分物体。准备期结束后，我们通过将对象集引入对象任务来测量猴子在视角变化时识别对象的能力。结果表明，在第二次但不是第一次准备任务后，有显着的视图不变识别。这些结果表明，当干扰物与物体相似时，需要在多个视角中区分物体和干扰物，以发展物体的视角不变识别。
One usually fails to recognize an unfamiliar object across changes in viewing angle when it has to be discriminated from similar distractor objects. Previous work has demonstrated that after long‐term experience in discriminating among a set of objects seen from the same viewing angle, immediate recognition of the objects across 30–60° changes in viewing angle becomes possible. The capability for view‐invariant object recognition should develop during the within‐viewing‐angle discrimination, which includes two kinds of experience: seeing individual views and discriminating among the objects. The aim of the present study was to determine the relative contribution of each factor to the development of view‐invariant object recognition capability. Monkeys were first extensively trained in a task that required view‐invariant object recognition (Object task) with several sets of objects. The animals were then exposed to a new set of objects over 26 days in one of two preparatory tasks: one in which each object view was seen individually, and a second that required discrimination among the objects at each of four viewing angles. After the preparatory period, we measured the monkeys’ ability to recognize the objects across changes in viewing angle, by introducing the object set to the Object task. Results indicated significant view‐invariant recognition after the second but not first preparatory task. These results suggest that discrimination of objects from distractors at each of several viewing angles is required for the development of view‐invariant recognition of the objects when the distractors are similar to the objects.