基于彩色航空影像的水体提取与应用实现

Based on the Color Aerial Images of Water Body Extraction and Application Implementation

天津市第一次全国地理国情普查领导小组办公室综合考虑天津市在三维数字建模、城市水淹分析实际应用情况,编写了《天津市第一次全国地理国情普查实施方案》,方案中明确地形地貌是此次普查的重要内容之一。根据天然水体在彩色航空影像上的表现特征,利用每个像素颜色的差别选取水体,将影像做栅格化和转换SHP面的数据处理,从而提取水体的矢量范围线,再经过滤除与分割,水体矢量线可直接应用于数字影像匹配DEM精细化处理和地理国情普查地表水系要素覆盖。

Tianjin First National Geographic circumstances leading group office in Tianjin in considering the three--dimensional digital modeling, urban flooding analysis of the actual application, the preparation of the＂Tianjin First National Geographic situation Census plan＂, the program clearly Terrain topography is an important part of the census.According to the features of natural water body on the color aerial images, using the difference of each pixel color to select water bodies, to process the image data of raster conversion and SHP conversion, so as to extract the vector range line of the water body, then through filtering and segmentation, water vector line can be directly applied to digital image matching DEM rmeticulous treatment and drainage elements coverage of geographic national condition survey.