毕业论文：《彩色数码管读数识别软件设计》.docVIP

PAGE PAGE 彩色数字仪表表盘读数的自动识别系统 摘要 目前，数码管显示的数字仪表在工业现场应用非常广泛。许多工业设备、仪器应用数码管显示其运行时的状态或输出其参数，如用数码管显示出涡轮的当前温度，显示出机器当前运行的转速等。尽管大多数这类仪表都有数字接口，但有很多应用场合还需要进行人工读数，如仪表的误差分析，仪表检测和校验，科学实验等。采用人工读取时，先要从各个仪表中读出数据，记录下来，用手工输入计算机中，工作量非常大，也容易出错，因此工作效率低，正确率难以保证。研制数字仪表表盘读数自动识别系统已势在必行。本次课程设计的目的是通过对基于MATLAB的字符识别的研究，以彩色数码管的读数识别的设计为实例，详细介绍字符识别的相关原理。彩色数码管读书识别的过程分为预处理、字符边界的定位和字符分割、字符识别三大模块，用MATLAB软件编程来实现每一个部分，最后识别出彩色数码管的具体示数。在研究的同时对其中出现的问题进行了具体分析，处理。寻找出对于具体的彩色数码管的读数识别过程的最好的方法。在字符分割过程中，采用增益方法识别边界，准确分割出单个字符。并采用统计黑点法和扫描直线法相结合的方法来识别数字。实验结果表明提出的方案可行，具有较强的鲁棒性。 关键词：数字仪表，数字提取，增益法，数字分割 AUTOMATIC RECOGNITION SYSTEM FOR CHARACTERS ON NUMERIC METER DIAL PLATE DISPLAYED BY LED Abstract At present, the digital display of the digital instrument is widely used in industry. Many industrial equipment, application of digital display operating in the state or the output of its parameters, such as a turbine with a digital display of current temperature. Although most of these instruments have a digital interface, but there are many applications still require manual readings, such as instrument error analysis, instrumentation and calibration, and scientific experiments. Artificial read, first read data from the various instruments in, recorded manually entered into the computer, the workload is very large, but also error-prone, so low efficiency and accuracy is not guaranteed. Development of digital meter dial readings automatic identification system is imperative. An automatic recognition system for characters on numeric meter dial plate displayed by LED is introduced．First，at the stage of character extraction，the approach of color extraction is used for extracting characters when the characters color is as same as background but has difference in brightness． Second，at the step of character segmentation，gain method is adopted for deciding characters edges and segmenting characters more accurately Besides，the combination of statistics and scan approaches is used for recognizing characters Finally，a series of expe