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Thread: How to use Rolled Fingerprint Acquisition with BioScan10 device.

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    How to use Rolled Fingerprint Acquisition with BioScan10 device.


    1.Activate acquisition with the software command.

    2.Wait for 2 seconds after activation of the scanner (green surface).

    3.Rest the fingertip from the left to right-hand side of the finger on the corresponding left or right-hand part of the acquisition surface (“flat fingerprint” phase).

    NOTE I: it is important to make sure that the finger is not rested on the scanner immediately after the start of acquisition (see point 2) so as to guarantee that the first image acquired is “pure” and can be used as reference for any traces left by previous acquisitions. If a finger is rested on the scanner prior to activation of acquisition or if the surface of the scanner is too dirty, this will be indicated by a specific diagnostic message.

    NOTE II: accurate selection of the point on the surface of the scanner on which to rest the finger at the start of acquisition is extremely important in order to guarantee sufficient space for “nail to nail” rotation of the finger. If, during rotation, the finger exits from the edges of the acquisition window, this will be indicated by specific diagnostic message.

    4.Rotate the finger slowly (without sliding it) towards the other side, applying a slight pressure (“rotation of the fingerprint” phase).

    NOTE I: it is important to make sure that the finger is not rotated too quickly: this phase must last around 1.5 seconds. If rotation is too fast, this will be indicated by a specific diagnostic message.

    NOTE II: the rotated surface acquired must be wide enough and the finger must be rotated “nail to nail” (see note 2 of the previous point). If the rotated surface is too narrow, this will be indicated by a specific diagnostic message.

    NOTE III: it is important to rotate the finger in only one direction, i.e. from right to left or left to right, avoiding any minimum, even unintentional, rotation in the opposite direction during the passage from the “flat fingerprint” phase to the “rotation of the fingerprint” phase (see points above). Otherwise, visible “seams” may appear in the final composite image. If this happens, it will be indicated by a specific diagnostic message.

    5.Remove the finger from the scanner when the entire surface to be acquired has been rotated: acquisition will end automatically.

    6.Check the quality of the composite image from the display window and using the quality indicator (contrast) and that relating to rotation artifacts.
    Last edited by uid.team; 06-30-2011 at 05:00 PM.

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