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acknowledgements for ansi/nist-itl 1-2011 - NIST Visual Image ...

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ANSI/<strong>NIST</strong>-ITL 1-<strong>2011</strong> - UPDATE 2013 DRAFT VERSIONthe standardized compression schemes, af<strong>for</strong>d reduced record sizes. All of the <strong>for</strong>matsestablish geometric specifications. For ISF = 1 and 2, there are minimum marginrequirements specified in terms of the estimated iris radius, R (see Table 91). For ISF =3 and 7, there are exact margin requirements. These requirements support accuratelocalization of the iris boundaries.Figure 20: Iris margin specificationISF codeTable 91 Iris storage <strong>for</strong>matsDescriptionIrisCenteringIris margin requirement(R is radius of the iris)Horizontal Vertical1 Unconstrained image size Recommended ≥ 0.6R ≥ 0.2R2 Raw: 640x480 Recommended ≥ 0.6R ≥ 0.2R3 Cropped Required = 0.6R = 0.2R7 Cropped and Masked Required = 0.6R = 0.2R8.17.31 Field 17.033: Iris pupil boundary / IPBThis optional field defines the pupillary boundary, between the iris and pupil. See Section7.7.12 <strong>for</strong> a description of encoding paths.8.17.32 Field 17.034: Iris sclera boundary / ISBThis optional field defines the limbic boundary, between the iris and sclera. See Section7.7.12 <strong>for</strong> a description of encoding paths.8.17.33 Field 17.035: Upper eyelid boundary / UEBThis optional field defines the boundary between the upper eyelid and the eye. SeeSection 7.7.12 <strong>for</strong> a description of encoding paths. This is an open path.358

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