Keypoint identification

A method for identifying keypoints in a digital image comprising a set of pixels is proposed. Each pixel has associated thereto a respective value of an image representative parameter. Said method comprises approximating a filtered image. Said filtered image depends on a filtering parameter and comp...

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Bibliographic Details
Main Authors BALESTRI MASSIMO, FRANCINI GIANLUCA, LEPSOY SKJALG
Format Patent
LanguageChinese
English
Published 13.04.2016
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:A method for identifying keypoints in a digital image comprising a set of pixels is proposed. Each pixel has associated thereto a respective value of an image representative parameter. Said method comprises approximating a filtered image. Said filtered image depends on a filtering parameter and comprises for each pixel of the image a filtering function that depends on the filtering parameter to calculate a filtered value of the value of the representative parameter of the pixel. Said approximating comprises: a) generating a set of base filtered images; each base filtered image is the image filtered with a respective value of the filtering parameter; b) for each pixel of at least a subset of said set of pixels, approximating the filtering function by means of a respective approximation function based on the base filtered images; said approximation function is a function of the filtering parameter within a predefined range of the filtering parameter; the method further comprises, for each pixel of said subset,
Bibliography:Application Number: CN201480041493