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Devolopment of a parallel analog vision chip for early vision

开发用于早期视觉的并行模拟视觉芯片

基本信息

批准号：
05650412
负责人：
YAGI Tetsuya
金额：
$ 1.41万
依托单位：
Kyushu Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

The vision chip is a novel image processing system, which is designed using analog CMOS Very Large Scale Integrated (VLSI) circuit technology, inspired by structures and functions of the retina. Since images projected on the chip are processed in parallel by dynamical properties of the VLSI circuit, the chip is expected to give a breakthrough to fatal disadvantages of conventional digital image processing systems in the real-time image processing. The purpose of this project is to design a vision chip which mimics functions and structures of the retinal bipolar cell network. The followings are the summary of results we obtained in 1994-1995.1.A resistive network model of the retinal bipolar cell was developed and the functions of the network were studied quantitatively. The circuit was found to reproduce the response properties of the retinal bipolar cell, e.g., smooting and contrast enhancement operations on images.2.Using the model, the function of retinal bipolar cell network was formulated in terms of the standard regularization theory of early vision.3.An analog VLSI circuit of the model was designed and performances of the circuit were analyzed with the simulation software PSPICE.4.A vision chip inspired by the model was fabricated through the MOSIS.5.We further studied temporal properties of bipolar cell network by incorporating dynamical elements in above model. The model was found to explaine the temporal properties of retinal bipolar cell response.

视觉芯片是一种新型的图像处理系统，它是采用模拟CMOS超大规模集成电路（VLSI）技术，设计灵感来自视网膜的结构和功能。由于投影在芯片上的图像是通过VLSI电路的动态特性并行处理的，因此该芯片有望突破传统数字图像处理系统在实时图像处理方面的致命缺点。本计画的目的是设计一个模拟视网膜双极细胞网络功能与结构的视觉晶片。以下是我们1994 - 1995年所获得的结果的总结。1.建立了视网膜双极细胞的电阻网络模型，并定量地研究了该网络的功能。发现该电路再现视网膜双极细胞的响应特性，例如，对图像进行平滑和对比度增强操作。2.使用该模型，根据早期视觉的标准正则化理论，建立了视网膜双极细胞网络的函数关系式; 3.设计了该模型的模拟VLSI电路，并利用PSPICE仿真软件对电路性能进行了分析; 4.利用该模型设计并制作了视觉芯片; 5.进一步研究了该模型的时间特性通过在上述模型中加入动力学元素，建立了双极细胞网络。该模型能较好地解释视网膜双极细胞反应的时间特性。