Patent ID: 7717341
Filing Date: 2010-05-18
Classification: G06K

Abstract:
1. An apparatus, comprising: a laser to emit a beam of light; a mirror to reflect the beam of light emitted by the laser: a scan line generator circuit to provide a drive signal to the mirror to move the mirror and direct the reflected beam of light in a motion responsive to the drive signal to scan a target; and a circuit to generate a first derivate signal of a reflectance profile received from the scanned target; wherein the circuit is capable of generating a digital signal representative of the scanned target based at least in part on an adaptive threshold applied to the first derivative signal, and wherein the adaptive threshold having a magnitude that is set to a lower value when a magnitude of the first derivative signal is lower valued, and the adaptive threshold having a magnitude that is set to a higher value when a magnitude of the first derivative signal is higher valued.