InSAS复图像配准法解析

海底地貌测绘的最新技术是利用干涉合成孔径声纳(InSAS)进行三维立体成像,其信号处理的关键在于成像之后的图像配准、干涉成像等步骤。图像配准的精度直接影响相位图的质量,从而影响所求目标区域高度的准确性。用相关系数法和最大干涉频谱法对湖试测得的目标成像图进行了配准,并使用复图像相干系数、干涉相位图质量和残余点数对配准效果进行评估,通过配准前后的参数比较,证实这两种方法用于InSAS复图像配准能够取得较好的配准效果。

InSAS Co -registration Mmethod Analyzation

Interferometric synthetic aperture sonar(InSAS) has been used to map the seabed elevation in recent years.The co-registration of InSAS complex images is one of the most critical steps,so it is really important to have the sub-pixel precision.Integrating correlation registration and maximum spectrum algorithm are used to analyze the InSAS signal gained by lake trial and evaluated by the correlation coefficient,interferential phase figure and the number of residues.The results prove that these two algorithm applied to the co-registration of InSAS complex images is valid.