Patent ID: 7302087
Filing Date: 2007-11-27
Classification: G06K

Abstract:
1. A method of processing iris image data, comprising: providing data representing an image of an iris of an eye; performing a Daubechies wavelet transform on the iris image data so as to create multiple pieces of transformed image data; selecting one from the multiple pieces of transformed image data; repeating to perform the Daubechies wavelet transform on a piece of image data so as to create additional multiple pieces of transformed image data and subsequently to select one from the additional multiple piece of the transformed image data, wherein the piece of image data on which the Daubechies wavelet transform is repeated is the selected piece that is selected in the immediately previous selecting step, wherein performing the Daubechies wavelet transform and subsequently selecting are repeated at least once; upon completion of the repeating step, forming a characteristic vector of the iris image of the eye, wherein the characteristic vector comprises quantatized pixel values of the selected piece of transformed image data that is selected in the last selecting of the repeating step, wherein the quantitized pixel values comprise at least two positive values and at least two negative values; providing a reference characteristic vector of a registered iris image; computing an inner product of the reference characteristic vector and the characteristic vector of the iris image of the eye; determining whether the iris image of the eye matches with the registered iris image based on a value of the inner product.