INFORMATION EXTRACTION WITH REGION GROWING METHOD AND FRACTAL DIMENSION RESEARCH IN THE JIUDUANSHA TIDAL CHANNELS OF YANGTZE RIVER ESTUARY
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摘要: 潮沟是潮滩的重要组成部分,对潮沟进行深入研究可以更深刻地了解潮滩地貌形态特征及其发育演变的规律性。利用2005年5月7日获取的SPOT5遥感全色波段数据,通过选取合适的种子点以及灰阶阈值,采用区域生长法进行了长江口九段沙潮沟信息的提取,并且将区域生长法提取出的潮沟信息采用网格法进行了分维研究,为九段沙潮滩资源的合理开发利用提供了参考依据。Abstract: As an important part of a tidal flat,tidal channels are critical to the understanding of topographic features of a tidal flat and its evolution.In this paper,the panchromatic band remote sensing data received by SPOT5 on May 7,2005 were used.The tidal channels information was extracted with the region growing method by selecting appropriate seed points and gray level threshold.Then the grid method was used to calculate fractal dimensions from the extracted tidal channel information.The results have provided a reference for the rational development and utilization of resources in Jiuduansha tidal flat.
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Key words:
- region growing method /
- fractal dimensions /
- tidal channels /
- Jiuduansha
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