A method to identify a key profile, comprising:
illuminating with two laminar beams emitted by two laser light sources said
two sides of said shank of a key driven to move axially relative to said beams,
reading with two video cameras, fixed relative to said sources and having
their optical axis inclined to said planes in which said light beams lie, said
two light profiles formed by said laminar beams striking said two surfaces of said
shank of said keys,
digitizing said optical images read in this manner, to obtain two sequences
of signals representative of said profiles of said two lateral surface portions
of said key, as instantaneously illuminated by said laminar beams and read by said
video cameras,
reconstructing from said signals, by means of a processor unit, a signal
representative of the entire key profile, and
comparing said thus reconstructed signal with said signal representative
of profiles stored in said processor unit to obtain data identifying said profile
of said read key.
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