A Mixed-Signal VLSI Circuit for Skeletonization by Grassfire Transformation
A Mixed-Signal VLSI Circuit for Skeletonization by Grassfire Transformation
复制标题
通过 Grassfire 变换进行骨架化的混合信号 VLSI 电路
DOI：
10.1007/bfb0020315
复制
发表时间：
1997
影响因子：
5.1
通讯作者：
András Lörincz
中科院分区：
文献类型：
--
作者：
M. Oláh;P. Masa;András Lörincz
本文提出了一种新型混合信号 VLSI 焦平面阵列处理器，以高达 IOK 帧/秒的处理速度执行二值图像骨架化的形态学操作。该芯片直接实现了grassfire算法。该系统是一个由相同处理元件 (PE) 组成的 2D 阵列，带有允许并行光输入的集成光电探测器。骨架计算通过PE之间的局部交互以完全并行、异步的方式执行，变换后的图像由模拟值表示。该变换是时间积分偏心环绕型非线性计算的 VLSI 模拟。变换的输出可以通过片上光栅扫描电路串行访问，生成多扫描兼容视频信号。该系统目前正在采用标准 0.7μm 数字 CMOS 工艺进行物理设计。介绍了处理元件的布局和初步的系统规格。
This paper presents a novel mixed-signal VLSI focal-plane array processor performing the morphological operation of skeletonization of binary images at a processing speed of up to IOK frames/second. The chip directly implements the grassfire algorithm. The system is a 2D array of identical processing elements (PEs) with integrated photodetectors allowing parallel optical input. The skeleton computation is performed in a fully parallel, asynchronous manner by local interactions between PEs, the transformed image is represented by analog values. The transformation is a VLSI analogue of time-integrated off-center-on-surround type nonlinear computation. The output of the transformation can be serially accessed with an on-chip raster-scan circuit generating multiscanning-compatible video signal. The system is currently being physically designed in a standard 0.7µm digital CMOS process. Layout of the processing element and preliminary system specifications are presented.