These moments include normalized central moments, hu's moment invariants, affine moment invariants, and tsirikolias-mertzios moments . the classification techniques used here are euclidean distance measure, normalized cross correlation and discrimination cost 這些矩包括規(guī)格化后的中心矩、hu矩不變量、仿射矩不變量和tsirikolias-的北丁業(yè)人學6卜學位論義擱要mertzios矩。