多时相星载SAR图像精配准技术研究

Fine Registration Technology of Multi-temporal Spaceborne SAR Image

介绍了一种多时相星载SAR精配准的技术方法,首先根据人工粗配准解决图像的旋转和尺度不一致,然后采用特征点提取算子和图像匹配的方法检测两时相SAR图像上的同名特征点,根据特征点构建不规则三角网最终实现图像的精确配准。通过多对星载SAR图像进行了精配准处理,采用定性和定量检验,表明该方法能达到很高的配准效果,配准精度优于一个像素。

The technology to register the multi-temporal spaceborne SAR image is presented.Manual coarse registration is executed to solve the rotation and scale problem first,and then homologous feature points in the images are detected by feature point detector and image matching.The irregular triangle network is constructed based on homologous points and fine registration is realized.Several couples of spaceborne SAR images are fine registered by the technology and accurate checking shows that the registration achieves good effect and the accuracy reaches less than one pixel.