FAST PERCEPTUAL-LEARNING IN VISUAL HYPERACUITY
FAST PERCEPTUAL-LEARNING IN VISUAL HYPERACUITY
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DOI：
10.1126/science.1589770
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发表时间：
1992-05-15
期刊：
影响因子：
56.9
通讯作者：
EDELMAN, S
中科院分区：
文献类型：
--
作者：
POGGIO, T;FAHLE, M;EDELMAN, S
在许多不同的空间辨别任务中，例如在确定游标刺激中的偏移的符号时，人类视觉系统通过以感光器直径的分数的精度评估空间关系来表现出超敏度。有人建议，这种令人印象深刻的表现部分取决于一个快速的学习过程，使用相对较少的例子，并发生在视觉通路的早期处理阶段。这一假设得到了支持的演示，它是可能的合成，从一个给定的任务，一个简单的网络，达到所需的性能水平的少量的例子。心理物理学实验与该模型的一些关键预测一致。特别是，快速刺激特定的学习被发现发生在人类视觉系统中，这种学习不会在两个略有不同的超敏度任务之间转移。
In many different spatial discrimination tasks, such as in determining the sign of the offset in a vernier stimulus, the human visual system exhibits hyperacuity by evaluating spatial relations with the precision of a fraction of a photoreceptor's diameter. It is proposed that this impressive performance depends in part on a fast learning process that uses relatively few examples and that occurs at an early processing stage in the visual pathway. This hypothesis is given support by the demonstration that it is possible to synthesize, from a small number of examples of a given task, a simple network that attains the required performance level. Psychophysical experiments agree with some of the key predictions of the model. In particular, fast stimulus-specific learning is found to take place in the human visual system, and this learning does not transfer between two slightly different hyperacuity tasks.