Patent Document ID: 20030044073
Application ID: 10265923
Patent Status: 0

Claim One:
1. An image recognition method comprising: an extraction step of extracting local feature elements in an input image; a conversion step of assembling the local feature elements extracted at said extraction step and generating array data from the local feature elements on the basis of a predetermined lattice pattern; and a matching step of estimating a resemblance between the local feature elements array data and a reference plurality of local feature elements array data stored in a memory by computing a differential value and selecting model array data for which the differential value is less than a predetermined threshold value, wherein said conversion step includes the steps of: generating a pair composed of a prescribed local feature element and position information indicative thereof in which the pair composed of a prescribed local feature element and position information indicative thereof is scaled at scaling ratios corresponding to respective ones of the resolutions; and selecting a pair composed of a scaled prescribed local feature element and position information indicative thereof, this pair being such that the distance between a pair composed of the scaled prescribed local feature element and position information indicative thereof and a pair composed of a local feature element, whose resolution corresponds to the scaling ratio, extracted at said extraction step and position information indicative thereof is less than a prescribed distance.