Research on a vision chip based on biological systems

开展基于生物视觉系统的基础器件、电路和网络研究，发展视觉lsi的基础技术。开发了一种模拟集成电路，实现了外视网膜的功能。利用MOS通道电阻连接所有光感受器，实现了一个简单的网络。通过改变栅极电压实现全局自适应。当地适应的基本回路也发展起来了。基于昆虫运动机理建立的相关模型，设计并制作了运动检测的基本模拟集成电路。结果，在一维空间中检测到移动光斑的方向和速度。研究了二维空间运动检测的基本电路。建立了目标跟踪模型，这是运动检测的关键。通过计算机仿真验证了跟踪的平滑性。设计了模型的基本电路，并通过SPICE仿真验证了其正常工作。对这些网络进行了重新设计，以使用当前的精细模式技术增加集成的规模。它们将通过VDEC制造。庆北大学以外视网膜的基本网络为基础，设计并制造了大规模集成电路。两所大学在视觉芯片的设计、制造和评估方面进行了合作。研究结果在国际会议和期刊上发表。

Research on fundamental devices, circuits and networks was carried out based on biological vision systems in order to develop basic technologies for vision LSIs.An analog integrated circuit was developed into which the function of an outer retina was implemented. A simple network was realized by utilizing a MOS channel resistance connecting all photoreceptors. Global adaptation was performed by varying a gate voltage. A fundamental circuit for local adaptation was also developed.For motion detection, a basic analog integrated circuit was designed and fabricated based on the correlation model constructed with the mechanism of an insect. As a result, the direction and speed of a moving light spot were detected in an one-dimensional space. A basic circuit was also studied for motion detection in a two-dimensional space.A model for target tracking was constructed, which is essential for the motion detection. Smooth pursuit was confirmed by computer simulation. Fundamental circuits for the model were designed and their normal operation was confirmed by SPICE simulation.These networks were redesigned to increase the scale of integration using a current finepattern technology. They are going to be fabricated through VDEC.In Kyungpook National University, a large-scale integrated circuit was designed and fabricated based on the fundamental network of the outer retina. Both universities collaborated for design, fabrication and evaluation of vision chips. Results of the research were presented at international conferences and in journals.