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US 8,577,094 B2Granted
Image template masking
OwnerDonald Martin Monroinventor
Life of this patent
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Abstract
A method of identifying images as matching comprises comparing two image templates using a master mask to select corresponding codes from the templates. The master mask excludes blocks from the matching process and/or weights blocks according to their known or expected reliability.
Claims21
A method of determining whether a first iris image matches a second iris image, comprising:
- extracting from said first and second iris images respective first and second templates, each template comprising a spatial arrangement of template codes;
- overlaying on said first template a master mask comprising a spatial arrangement of master mask codes, each master mask code being representative of an expected variability or matching reliability within a population of iris images of different individuals of a template code of corresponding spatial location;
- comparing said overlaid first template with said second template;
- and
- determining whether a match exists in dependence upon said comparison, said match indicating that said first and second iris images are images of the same human or animal individual.
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Dependencies are inferred from the claim text.