【摘要】 (研究了分时电表表盘数字的自动识别,它是电表误差分析系统的关键所在。识别工作包括平段和谷段整数和小数数字的识别,难点在于刻度轴歪斜、半个字符的识别,以及刻度对应的小数值的推算。该文构建了一个完整的分时电表表盘数字自动识别系统。该系统以二值化、投影算法、开闭运算、边缘提取、Hough变换等一系列算法作为预处理,提出了整字和非整字两种识别算法。针对300帧现场采集的电表图像,该系统获得了单字正确识别率99.8%和整表正确识别率97.3%的结果,表明该系统具有较强的鲁棒性。更多还原

【Abstract】 Research on automatic recognition for numeric characters on time-sharing ammeter dial plate, which is the key problem for ammeter error analysis system is presented. The difficulties preventing the correct recognition come from: decline of fixing, half character recognition and decimal calculation. An automatic recognition system for numeric characters on time-sharing ammeter dial plate is constructed. This system uses binary transform, projecting algorithm, open algorithm, close algorithm, edge detection and Hough transform as pretreatment and puts forward two algorithms on whole character recognition and half character recognition. The experiments show that this system is robust.更多还原