Synel SY-760, Руководство пользователя

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resemble the raw image, but whereas a raw image is 90K bytes, the compressed template is only
around 400 bytes.
Fingerprint Core is the term used to describe distinguishing print characteristics usually found in the
area of the print where the topography shows the tightest curvature. Although the entire fingerprint
has significant data, the “core” is the most data- intensive area and therefore very important.
Proper Finger Placement
The basics for successful operation of the FPU are important.
System performance improves dramatically with consistent finger placement. It is important to
make sure that the position of the finger allows the FPU to record the unique features of the print.
Follow the steps below for trouble-free fingerprint recognition.
FPU operation - Instructions and regulations:
• In view of our experience, we strongly recommend that each employee practices finger positioning
on the sensor prior to actual enrolment!
• Avoid using thumb and pinky fingers since they are typically awkward to position consistently on
the sensor.
• Place the higher joint of your finger on the ridge lock and lower your finger onto the sensor surface
(make sure all other fingers are held straight to avoid creating an angle between the enrolled finger
and the sensor surface - incorrect positioning).
• When using an Authentec sensor sensitive to static electricity, touch the sensor's plastic casing
(black) to discharge static electricity. Keep your finger steady.
• Press your finger gently onto the panel, avoid excessive pressure as it will blur the print.
With the fingertip raised, position the finger so
that the Ridge- Lock rests comfortably. Then,
lower the finger onto the sensor and apply
moderate pressure. The figure at right illustrates
proper finger placement and the resulting image