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Dynamic predictive coding by the retina

机译:视网膜动态预测编码

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Retinal ganglion cells convey the visual image from the eye to the brain. They generally encode local differences in space and changes in time rather than the raw image intensity. This can be seen as a strategy of predictive coding, adapted through evolution to the average image statistics of the natural environment. Yet animals encounter many environments with visual statistics different from the average scene. Here we show that when this happens, the retina adjusts its processing dynamically. The spatio-temporal receptive fields of retinal ganglion cells change after a few seconds in a new environment. The changes are adaptive, in that the new receptive field improves predictive coding under the new image statistics. We show that a network model with plastic synapses can account for the large variety of observed adaptations.
机译:视网膜神经节细胞将视觉图像从眼睛传递到大脑。它们通常编码空间的局部差异和时间的变化,而不是原始图像的强度。这可以看作是一种预测编码策略,通过进化适应自然环境的平均图像统计量。然而,动物在许多环境中所见的视觉统计与普通场景有所不同。在这里,我们显示出发生这种情况时,视网膜会动态调整其处理过程。在新的环境中,几秒钟后,视网膜神经节细胞的时空感受野就会发生变化。这些变化是适应性的,因为新的接收场改善了新图像统计下的预测编码。我们表明,具有塑料突触的网络模型可以解释观察到的适应的多种多样。

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