期刊
IEEE TRANSACTIONS ON NEURAL NETWORKS
卷 17, 期 1, 页码 222-232出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNN.2005.860865
关键词
analog VLSI; birefringent micropolarizer; neuromorphic CMOS; Octopus retina; polarization vision
Biological systems provide a wealth of information which form the basis for human-made artificial systems. In this work, the visual system of Octopus is investigated and its polarization sensitivity mimicked. While in actual Octopus retina, polarization vision is mainly based on the orthogonal arrangement of its photoreceptors, our implementation uses a birefringent micropolarizer made Of YVO4 and mounted on a CMOS chip with neuromorphic circuitry to process linearly polarized light. Arranged in an 8 X 5 array with two photodiodes per pixel, each consuming typically 10 mu W, this circuitry mimics both the functionality of individual Octopus retina cells by computing the state of polarization and the interconnection of these cells through a bias-controllable resistive network.
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