手写满文字母采集系统的设计与实现

鉴于目前没有完整的手写满文字母库,在分析当前手写满文字母库的建立方式后,提出了嵌入式搭载触摸屏的手写满文采集方案,设计了基于STM32F4处理器的手写满文字母采集系统。该系统以Keil 5软件为开发平台,利用C语言开发了触摸屏、SRAM模块、SD卡和通信模块驱动,编写了手写输入采集、优化后的预处理和特征提取算法,并通过串口实现了与PC机的数据传输。系统整体电路采用 Altium Designer 9软件设计。经测试,系统能够较好地完成所需功能,且界面友好、操作方便、成本低廉、实时性强。

Design and Implementation of Handwritten Manchu Alphabet Acquisition System

In view of the fact that there is no complete handwritten Manchu alphabet database currently, after analyzing the organization methods of the existing handwritten Manchu character alphabet database, a novel acquisition method based on the embedded system is proposed with a touch screen as the acquisition device, then a handwritten Manchu character acquisition system based on an STM32F4 microprocessor is designed. Using Keil 5 as developing platform and C as the programming language, driver programs of the touch screen, SRAM module, SD card module and communication module are developed, algorithms of the handwritten input acquisition, the optimized pre-processing and the feature extraction are designed. The data transmission between this system and computer is implemented by the RS-232 serial port. The overall PCB layout of the system is designed by Altium Designer 9. Tests show that the system can accomplish the required functions with friendly interface, convenient operation, low cost and strong real-time performance.