G - Physics – 06 – K
Patent
G - Physics
06
K
G06K 9/60 (2006.01) A61B 5/117 (2006.01) G06K 9/52 (2006.01)
Patent
CA 2516604
The invention relates to a method and an arrangement for acquiring biometric data of a finger. It is a task of the invention to specify a method and an arrangement, by which the disadvantages of the known methods for recording and processing of fingerprints are avoided and which can reproduce at least a finger-ball user-friendly and reliable and which enable an increased fraud resistance. According to the invention, for acquiring biometric data of a finger a surface to be imaged is touchlessly and simultaneously imaged along at least three different directions into digital images, wherein each point of said surface to be imaged is imaged along at least two of said directions and wherein said surface to be imaged extends from a first nail edge across a finger-ball to a second nail edge. Subsequently, a geometric basic model for at least a part of the finger is determined using at least one of said digital images. Pre-warped images are calculated by geometrically pre-warping the digital images using said geometric basic model. Additionally, a three-dimensional model of the surface to be imaged is reconstructed using a stereoscopic analysis of the pre-warped images and at least one finger characteristic is determined using the three-dimensional model.
Hauke Rudolf
Paar Gerhard
Parziale Giuseppe
Riches Mckenzie & Herbert Llp
Tbs Holding Ag
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