As Figure 4 shows, the algorithm for extracting iris features may be summarized in three steps: The first and highly significant step in iris recognition is the iris boundaries' localization in the eye image Afterward the establishment of the iris inner and outer boundaries, an invocation of geometric normalization scheme is made and then a rubber sheet model is used to transform the iris texture present in the annular region from Cartesian coordinates to pseudo polar coordinates.
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A Hybrid Approach to Multimodal Biometric Recognition Based on Feature-level Fusion of Face, Two Irises, and Both Thumbprints.
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