基于隐含特征和SIFT方法的SAR图像多尺度配准

打开文本图片集

DOI：10.16652/j.issn.1004-373x.2026.01.009引用格式：，，，等.基于隐含特征和SIFT方法的SAR图像多尺度配准[J].现代电子技术，2026，49（1）：54-58.

关键词：隐含特征；SIFT方法；SAR图像；多尺度配准；极化分解；Wishart梯度；特征极值点；描述向量中图分类号：TN911.73-34；TP391 文献标识码：A 文章编号：1004-373X（2026）01-0054-05

SARimagemulti-scale registration based on implicit features and SIFT method

MENGQianyan1，YANLiyu²，YEJunming1，DENGYunyi1 （1.SchoolofElectronicInformation，GuilinUniversityofElectronicTechnology，Beihai536ooo，China; 2.School of Computer Engineering，Guilin Universityof Electronic Technology，Beihai 536ooo，China）

Abstract：In viewof theunevendistributionoffeaturepointsand insuficient matching intheprocessofSAR（synthetic apertureradar）imageregistration，anSARimagemulti-scaleregistrationmethodbasedonimplicitfeaturesandSIFT（scaleinvariantfeaturetransform）methodisproposed.AfterpolarizationdecompositionofSARimages，theWishartdistributionisused to describe the coherence matrix gradient of SAR images，and then resolution units 1 to are used to describe the Wishart gradientofSARimages，obtainingasingle-stageSARimageratiogradient.ThisratiogradientistheimplicitfeatureofSAR images.The SIFT methodisusedtoestablishanSAR multi-scalespace，andadownsampledimageof SARimages isgenerated inthismulti-scalespace.Thesingle-stage SAR imageratio gradientiscalculatedonthebasisof thedownsampledimage. According totheimplicit featuresofSARimages，thefeatureextremumpointsandthemaindirectionofthefeaturepointsare determined，anduniformSARimagemulti-scaleregistrationfeaturedescriptionvectorsaregenerated.Andthen，thedistances betweenthe featuredescriptionvectorsaredescribedwith Euclideandistance，soas torealizemulti-scaleregistrationof SAR images.Theexperimentalresultsshowthattheproposed methodhasstrong abilitytoextractimplicit featuresfrom SARimages， andcanachievehigh-qualitymulti-scaleregistrationinthepresenceofscalingandrotationofSARimages，withgood applicability.

KeyWords：implicit feature;SIFTmethod;SARimage;multi-scaleregistration；polarizationdecomposition；Wishart gradient; feature extremum point; describing vector

0 引言

磁波脉冲，并记录这些脉冲在遇到地表物体后反射回来的信号来制作的遥感影像。（剩余5985字）