Patent Document ID: 6151403
Application ID: 08920844
Patent Status: 1

Claim One:
1. A computer program product for locating first and second human eye objects each having substantially the same physical characteristics, and the ratio of the distance between the first and second human eye objects and the size of each human eye object is substantially invariant, the computer program product comprising: a computer readable storage medium having a computer program stored thereon for performing the steps of: (a) determining a potential flesh region in an intensity image; (b) determining valley regions in the intensity image for determining substantially non-flat regions with lower intensity values in a local area of the intensity image; (c) performing matching in the intensity image using an intensity-based template in a neighborhood of the valley regions within the flesh regions for determining a plurality of locations that give a desirable match of the human eye object relative to the template, said step of matching using cross-correlation to identify desirable locations; and (d) performing verification by mating a pair of potential human eye object candidates with desirable matching response to the template by using a plurality of verification criteria selected from the group including the orientation, proportion, profile, symmetry, and centrality of the paired human eye objects matched to the intensity-based template, wherein the verification criteria comprise finding the best pair of locations of human eye objects by computing figures of merit individually or in combination for the plurality of verification criteria, and wherein the figure of merit for orientation includes measuring the difference between an orientation of a line connecting the first and second human eye objects, and an average orientation of the first and second human eye objects.