降水自记纸彩色图形数字化的技术处理

The Technical Processing of Color Graph Digitizing of Precipitation Recording Papers

利用降水自记纸彩色图形数字化处理技术,实现降水自记纸图形数字化是对气象历史档案拯救技术的有效探索。降水自记纸彩色图形数字化处理是采用图形扫描和数据处理技术,对降水自记纸进行图形扫描,利用降水自记纸数字化处理系统软件,提取降水曲线,将降水自记纸转换成标准分钟降水数字化资料,获取一系列满足降水时空精细化分析要求的降水自记纸图像数据集、降水曲线数据集、以及分钟、小时尺度的降水数据集。最终形成分钟和小时降水强度的标准文件,实现对降水自记信息的完整、真实、安全的保存。它是改变目前状态、使其信息的内在含义得到充分利用、价值得以充分体现的唯一途径。降水自记纸彩色图形数字化技术处理,从5个环节(自记纸预处理、扫描、扫描检查、降水曲线提取、降水强度数据转换)入手,结合实际工作经验,详细分析降水自记纸数字化处理过程中的技术问题及解决方法。

The use of the color graph digitizing processing technology of the precipitation recording paper, is an effective exploration for rescuing the archives of climate history.The technology applying graph scanning and data processing,can scan pictures of precipitation recording paper,and can extract dropdown curve and convert precipitation recording papers into digitizing data of precipitation per minute,by the use of digitizing processing system of the precipitation recording paper.Then we can achieve a series of data set,including precipitation graph and precipitation curve,which based on minute-index or hour-index.Finally we can get the standard file of precipitation intensity per minute or hour,so as to achieve the goals of saving data of precipitation autographic records wholly,actually and safely.The technology is the only way to change the current situation,and it makes full use of the implications of the information and reflects the value fully.By the use of the color graph digitizing technologic processing of the precipitation recording paper,and in the light of practical work experiences,we can analyze in detail the technologic problems during the course of digitizing processing and find their solutions.