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Fingerprint detection using sweep-type imager with optoelectronic speed sensor

机译:使用带有光电速度传感器的扫描式成像仪进行指纹检测

摘要

In a method and an arrangement for detecting skinprints, in particular fingerprints, it is provided that at least one strip sensor comprising at least one elongate narrow sensor line detects the structure of the fingertip when the fingertip passes over the strip sensor, that at least one optoelectronic speed sensor continuously determines the finger movement, that the fingertip is moved over at least one optoelectronic speed sensor and the strip sensor, and that the determined finger movement is used to correct an image of the finger structure that has been distorted as a result of non-uniform movement. Preferably, the speed sensor evaluates the Doppler shift of a modulation of the modulated laser light reflected at the moved finger surface.
机译:在一种用于检测皮肤印记,尤其是指纹的方法和装置中规定,当指尖经过带状传感器时,至少一个包括至少一条细长的窄传感器线的带状传感器检测指尖的结构,即至少一个光电速度传感器连续确定手指运动,指尖在至少一个光电速度传感器和条带传感器上移动,并且确定的手指运动用于校正由于以下原因而变形的手指结构的图像:非均匀运动。优选地,速度传感器评估在移动的手指表面处反射的调制激光的调制的多普勒频移。

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