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利用空间矩提取亚象素角特征

, PP. 713-719

Keywords: Spatialmoment,cornerdetection,gradient-directioncorner,bilinearinterpolation

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Abstract:

?Anovelsubpixelcornerdetectionmethodbasedonspatialmomentisdevelopedinthispaper.Firstly,thespatial-moment-generatingfunction,gradientmagnitudeandvariationofgradient-directioncornerareusedasthedecisionruleofcornerdetectionbyanalyzingthemathematicalformulaofcorner-modelspatialmoment.ThenNon-maxsuppressiontechniqueisutilizedtodetectthevertexoffeaturecorner.Finally,inordertoimproveitslocalizationperformance,subpixelcornerdetectionisimplementedbythebilinearinterpolationandNewtoniterationmethod.ExperimentsillustratethatthespatialmomentcornerdetectorhasbetterrobustnessandlocalizationperformancethanKitchendetectorandHarrisdetector.

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