摘要
针对图纸以位图形式存储时在图纸检索前需解决的问题,提出了对扫描图纸进行相应的预处理工作,主要包括图纸的坐标变换、图纸特征抽取等。采用改进的Hausdorff距离方法调整图纸位置,实现图纸坐标变换。同时基于MPEG-7规范给出了图纸的存储表示方法,实现图纸基本信息及其特征信息的统一表示,方便了基于关键字及内容的图纸检索。
The engineering drawings in enterprise are generally stored in the format of bitmap or vector. Aimed at these problems before the retrieval of drawings in the bitmap format, such as preprocessing jobs of the scanned drawings in the bitmap format, the coordinate adjusting and character extracting of the drawings, it adopts improved Hausdorff distance method to adjust the position of the drawing, presents the storage way of the drawings based on MPEG- 7 form. It realizes the uniform denotation of the basic and characteristic information of drawings, the method is convenient for retrieving drawings based on keywords and contents.
