极地研究2016，Vol.28Issue(2)：243-249,7.DOI:10.13679/j.jdyj.2016.2.243
基于改进 NCC 算法的东南极极记录冰川流速提取研究
DERIVATION OF ICE-FLOW VELOCITY OF POLAR RECORD GLACIER USING AN IMPROVED NCC ALGORITHM
摘要
Abstract
The ice-flow velocity of Antarctic glaciers plays an important role in the mass balance of Antarctica.In this study,a rotation parameter from the scale invariant feature transform(SIFT)algorithm was introduced into the tra-ditional method for ice-flow velocity derivation,based on the Normalized Cross Correlation (NCC)algorithm,to build a method with rotation invariance.Ice-flow velocities for the Polar Record Glacier in East Antarctica were then derived using Landsat 8 OLI data and the method developed in the first part of the study.Validation was car-ried out using simulated data and velocity data from NASA’s MEaSUREs project.The results indicated that more ice-flow velocity information in the direction of velocity change could be derived using the improved algorithm.This method derived a maximum velocity of 870 m·a -1 for the Polar Record Glacier,compared with MEaSUREs data that showed an average offset of 23.9 m·a -1 .关键词
极记录冰川/冰川流速/归一化互相关/旋转不变性Key words
Polar Record Glacier/ice-flow velocity/Normalized Cross Correlation (NCC)/rotation invariance引用本文复制引用
牛牧野,周春霞,刘婷婷..基于改进 NCC 算法的东南极极记录冰川流速提取研究[J].极地研究,2016,28(2):243-249,7.基金项目
国家自然科学基金（41206177，41376187）、国家海洋局“南北极环境综合考察与评估”专项（CHINARE2015-02-04）、测绘地理信息公益性行业科研专项（201412009）和极地测绘科学国家测绘地理信息局重点实验室开放基金（201401）资助 （）
