G - Physics – 06 – K
Patent
G - Physics
06
K
G06K 9/60 (2006.01) A61B 5/117 (2006.01) G06K 9/00 (2006.01)
Patent
CA 2488492
The invention is directed to a method and an arrangement for the optoelectronic recording of a moving object, particularly for recording a finger that is rolled on a support surface. It is the object of the invention to find a novel possibility for electronic recording of rolled fingerprints which enables high-resolution individual images with a high image rate for joining the individual images without gaps to form a total image by means of simple sensors. This object is met, according to the invention, in that a shape (32) surrounding the object (1) is determined from the position and size of the object (1) in at least one of the individual images read out from the image recording unit (2), in that a rectangle (33) which is enlarged by tolerance allowances and which is oriented parallel to the row direction and column direction of the sensor (22) is determined from the surrounding shape (32), and in that the enlarged rectangle (33) is used to predict and adjust the size and position of an active pixel area (23) of the image recording unit (2) for at least one image (31) to be read out subsequently, so that the read out active pixel area (23) of the image recording unit (2) is always kept small due to its adaptation and a higher image rate is realized in the sensor. readout or data transfer.
Eichhorn Torsten
Friedl Andy
Gerling Torsten
Morgeneier Dirk
Standau Joerg
Fetherstonhaugh & Co.
Smiths Heimann Biometrics Gmbh
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