基于边缘特征和ST-ORB检测的图像配准算法

    Image Registration Algorithm Based on Edge Feature and ST-ORB Detection

    • 摘要: 针对多模态遥感图像因斑点噪声与局部失真导致的配准难题,文中提出一种融合边缘分割网络与特征点检测描述算法的配准方法。首先通过改进的特征提取算子对合成孔径雷达图像进行强边缘特征提取,接着构建强边缘特征标签,训练改进的Deeplabv3+边缘分割模型,以深度网络的方式提取图像的强边缘特征;最后使用提出的算法在特征图上进行特征点检测和描述。通过将深度学习语义分割算法与传统鲁棒性特征点检测描述方法相融合,有效提升了配准算法的可靠性与鲁棒性。对四种类型图像开展平移、旋转及缩放变换的配准测试,结果显示算法平均均方根误差仅为2.088,证明了所提算法的优越性。

       

      Abstract: In this paper, a registration method that integrates an edge segmentation network with feature point detection and description algorithms is presented for addressing the registration challenge posed by speckle noise and local distortions in multi-modal remote sensing images. Firstly, an improved feature extraction operator is employed to extract strong edge features of SAR images. Then, strong edge feature labels are constructed, an improved Deeplabv3+ edge segmentation model is trained to extract strong edge features from the images in a deep network manner. Finally, the proposed algorithm is used to detect and describe feature points on the feature maps. By integrating a deep learning-based semantic segmentation algorithm with traditional robust feature point detection and description methods, the reliability and the robustness of the algorithm have been improved. Registration tests involving translation, rotation, and scaling transformations are carried out on four types of images, and the results show that the aglorithm′s average RMSE reaches 2.088, demonstrating the superiority of the proposed algorithm.

       

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