Study on Shape of Potatoes Based on Dividing Point's Proper of Matrix's Fourier Descriptor

Shape of potato is one of the important index of potato's classification.Amming at the object recognising system of real time figure processing,this article came up with a new shape recognising method which combined proper of matrix and Fourier descriptor.This method took center of mass as focus and divided object into many fan regions,computed the proper value of matrix of every fan region and got the proper of matrix series which can show object's shape.Then the normalization proper of matrix Fourier descriptor which was invariable thouth translation,rotation and proportion invariant was gotten via discrete Fourier Transformation.And shapes were classified thougth similarity calculation.The experimental result demonstrated that this method can make translation,rotation and proportion transformation unchangeable.And it can define shape of potatos as round,elliptical and anamorphotic accurately,accuracy rate are 90%,93.3%,100% respectively.Which has high recognition rate and a promising application prospect.