摘要： 在审图系统中，对报送的工程图纸扫描件和先前的电子图纸的一致性检测是一个重要环节。该文将由绘图软件(如AutoCAD等)绘制的以矢量形式保存的电子图纸转化为以栅格形式存储的图像文件，再利用该栅格图像文件对扫描件进行预处理，并用小波变换和计算分形维数对扫描图纸和栅格文件进行比对。实验结果表明，该算法能够很好地实现扫描图纸和栅格文件的比对。

关键词: 去噪, 配准, 小波变换, 分形维数

Abstract:

Consistency checking between the scanned drawing and the electronic drawing is one of the important steps in the flow of electronic declaring. The electronic blueprint is transformed in vector form preservation drawn up by the cartography software (AutoCAD and so on) to the image document saved by the grid form, this grid image document is used to preprocess the scanned blueprint, and finally consistency checking is carried on between the scanned blueprint and the grid document using the wavelet transformation and the computation fractal dimension. The experimental result indicates that the algorithm can realize the consistency checking between scanning blueprint and the grid document well.

Key words: denoising, registration, wavelet transform, fractal dimension

中图分类号: 

• TP311