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Neural models of brightness perception and retinal rivalry in binocular vision

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Abstract

In binocular fusion, pairs of left and right stimuli yielding the same brightness perception constitute an equibrightness curve in a coordinate system whose ordinate and abscissa correspond to the left and right stimulus strengths. A neural network model is presented to elucidate the characteristics of the curve. According to the model, Fechner's paradox is due to the threshold characteristics of the neuron. If the shapes or movements are radically different between the left and right stimuli, the retinal rivalry is caused. That is, only the left stimulus is perceived at one moment and the right stimulus at another moment. The period of left or right eye dominance alternates randomly from time to time. The distribution of the period is approximate to the gamma distribution. In order to account for this fact, a neural network model is proposed, which consists of a pair of neurons receiving inputs with stochastic fluctuations. The computer simulation was carried out with satisfactory results. The model of retinal rivalry is integrated with that of brightness perception.

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  1. Department of Information Science, Faculty of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan

    Noboru Sugie

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  1. Noboru Sugie
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Sugie, N. Neural models of brightness perception and retinal rivalry in binocular vision. Biol. Cybern. 43, 13–21 (1982). https://doi.org/10.1007/BF00337283

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