频率域多核匹配检测埃默里冰架冰流速

摘要

冰架表面流速是对冰架进行动力学研究的重要因素.针对频率域影像互相关检测冰流速的过程中匹配结果对核窗口大小的选择具有敏感性的问题,提出了在影像匹配的过程中使用多个不同大小的核窗口进行匹配验证同名点位置的方法.为了评估该结果的可靠性,使用美国国家冰雪中心发布的全南极冰流速度集埃默里冰架地区的冰流速作为对比.实验结果表明,所提出方法可以获取较为稳定的埃默里冰架冰流速度场,其结果与全南极冰流速度集埃默里冰架地区的流速基本一致.%The velocity of the ice shelf is an important factor in its dynamic research.It is found that the image matching result is sensitive to the selection of the kernel window size.Focus on this question,this paper proposes a method of using the multiple kernels to verify the position of homologous points.To evaluate the reliability of the proposed method,we compared the results of proposed method with Antarctic ice velocity Maps published by NSIDC.The experiments show that the image matching results obtained using the multiple kernels algorithm in the frequency domain are consistent with the existing Antarctic Ice Velocity Maps,and yields a more robust velocity field for the Amery ice shelf.