基于FPGA的印刷体数字采集识别系统  

Digital image acquisition and recognition system based on FPGA

作　　者：于波[1] 陈先瑞 张强[1] 李建成 Yu Bo;Chen Xianrui;Zhang Qiang;Li Jiancheng(School of Physics and Electronic Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学物理与电子工程学院,大庆163318

出　　处：《电子测量技术》2021年第16期7-11,共5页Electronic Measurement Technology

摘　　要：为了增强数字图像采集识别过程中的高效性、实时性以及稳定性,设计了一款以Altera公司Cyclone IV E系列EP4CE10F17C8型号的FPGA为主控芯片,利用SCCB传输协议进行印刷体数字采集识别的系统。该系统采用OV5640摄像头作为图像的采集前端,将采集到的数字图像数据缓存到外部SDRAM,再从SDRAM中读取数据通过LCD驱动进行颜色空间转换、二值化处理、投影分割以及特征匹配识别操作,最后通过数码管及RGB LCD显示屏对识别结果进行显示。对于印刷体数字,该系统可以实现快速准确的识别,适合低延时以及对识别精度等要求较高的场合。In order to enhance the high efficiency,real-time performance and stability in the process of digital image acquisition and recognition,a system based on Altera Cyclone IV E series EP4 CE10 F17 C8 FPGA as the main control chip and SCCB transmission protocol is designed.The system uses the OV5640 camera as the front end of image acquisition.The collected digital image data is cached to the external SDRAM,and then the data is read from the SDRAM to carry out color space conversion,binarization processing,projection segmentation and feature matching recognition by LCD driver.Finally,the identification results are displayed by digital tube and RGB LCD screen.For printed numbers,the system can realize fast and accurate identification,suitable for low delay and high demand on identification accuracy.

关 键 词：数字图像采集识别 FPGA SCCB OV5640摄像头 SDRAM 

分 类 号：TN4[电子电信—微电子学与固体电子学] TN91