Extraction of sandbank shoreline of Jiangsu based on wavelet transformation

The sandbank is a potential huge land resources, especially for land nervous regions, however, it has a very important realistic significance. So it becomes more important for sandbank shoreline´s rapid monitoring, extraction and changing analysis. For the rapid extraction of sandbank shoreline of Jiangsu, China. Wavelet transform will be used first to process TM image. Then, on the basis of analyzing the gray value in each band of TM image, spectrum-photometric method will be used to pick up water body. And then generate a binary image, and carries on the non-directional edge enhancement processing. Last, generate a vector image of sandbank shoreline. By this method, we can improve the computer processing speed, and, it is useful for treatment of mass data of multi-temporal and wide range. In addition, also greatly shorten the time of artificial extraction and reduce the error caused by artificial subjective.