摘要
文字在扫描地图和工程图纸中是一个比较特殊的对象．如果不加区分地对文字和图形同时进行细化和矢量化，会使图纸线条产生畸变．所以设计一种算法从原始扫描图纸上发现文字并加以抹去，便十分有用．本文提出了一种通用型的文字过滤器算法，针对地图上的汉字具有笔划稠密，形状大小先验，文字孤立的特征，用膨胀－腐蚀算法强化文字特征，利用滑动框架等方法直接在原始扫描地图上发现并抹去文字．
Characters are special objects in scanned maps and engineering drawings. They will make the lines twist after thinning if having not been separated from lines. So it is useful to design an operator called “Chinese character filter”. It is a typical algorithm of pattern recognition, based on the three features: concentrated strokes, shape and size, and isolation. Expansion and erosion algorithm is first used to strengthen those features, and other algorithms like sliding frame algorithm are used to find the locations of characters based on the characteristic features. Then, it is easy to delete them with the known size and shape.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
1998年第2期124-131,共8页
Journal of Computer-Aided Design & Computer Graphics
