彩色航空影像中的建筑物阴影提取

在彩色航空影像中，建筑物阴影能提供大量关于建筑物形状、位置等相关信息。提出了一种基于特性的自动提取建筑物阴影的方法，以获取彩色航空影像中建筑物阴影的形状信息。利用可分离亮度和色调的颜色模型（包括HSV、YIQ、YCbCr颜色模型）提取彩色航空影像中的建筑物阴影，并利用数学形态学处理阴影分割图像。试验结果表明该方法是行之有效的。

Shadow Extraction of Building in Color Aerial Images

The shadow regions of building in color aerial image can provide clues about the shape and position of its casting objects. An automatic property - based approach for the extraction of shadows regions with shape information preserved in color aerial images is presented. This technique is applied in HSV, YIQ and YCbCr models that deeouple luminance and ehromaeity for shadow extraction. Mathematiel morphology technique is used to process the shadow regions. The results show the effectiveness of the proposed approach in revealing shadow details and suitability of these color models in shadow extraction of building in color aerial images.