基于区域特征的航拍图像水上桥梁自动识别

Automatic Recognition of Bridge Above Water in Aerial Images Based on Regional Feature

摘要: 针对航拍图像中水上桥梁目标的自动识别问题,提出了基于区域特征的水上桥梁自动识别算法。首先对航拍图像进行基于梯度均方差的图像二值化;再进行基于像素密度的二值图像去噪;然后进行基于像素的二值图像连通区域标记,区域标记算法采用6邻域连通规则进行标识,能够有效获取水域的区域特征;最后进行桥梁的精确提取。实验结果表明,该算法能够有效地识别低对比度、低空侧拍等复杂航拍图像中的水上桥梁目标。

Abstract: Addressing the automatic recognition problem of a bridge above water in aerial images,an automatic recognition algorithm for a bridge above water in aerial image based on regional features is proposed.Firstly,aerial image binarization is executed based on the gradient mean square variance.The image noises are then removed based on pixel density.Next,the connective regions are labeled according to the pixels in binary image with a six neighborhood connection rule to obtain the water regional feature.Finally,the bridge is extracted.Experiments show this algorithm is effective for automatic recognition of a bridge above water in low-contrast aerial images taken at low altitudes.