Synel SY-760, Руководство пользователя

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Scanning an Image
When the FPU properly reads a fingerprint, it looks for image quality and fingerprint content. When a
raw image is collected from the sensor during enrollment, for verification or identification, the FPU
searches for the fingerprint core.
Content scores are based on the amount of unambiguous data in the region of the core. The higher
the content, the greater the degree of useful information.
See Using Content and Quality for Enrollments for a thorough description of content.
Quality scores are based on how well the ridge pattern is defined within the image. For best image
quality, be sure that the sensor window is clean of residue, or other material that can block the FPU
from the best fingerprint view. Once the image is scanned, the FPU creates and stores the resulting
fingerprint template.
Verification is the operation of entering a PIN #, requesting the user to place their finger on the
FPU, scanning the finger, comparing the current scan against stored fingerprint templates for that
user, and then notification of a successful validation or a failure.
Identification is the operation of requesting the user to place their finger on the FPU, scanning the
finger, comparing the current scan against all stored fingerprint templates (regardless of user). If the
user is in the database, identifying the user. Identification is only available on a searching FPU units.
Fingerprint Template is the data stored on the FPU that mathematically represents the pattern of
an enrolled fingerprint. This data is not the raw image of the fingerprint, but the result of processing
the raw image through a unique algorithmic process, preparing the data for later comparisons, and
compressing the data for maximum storage. An image of the uncompressed template data does