Apparatus for correcting fixed column noise in images acquired b

Details Apparatus for correcting fixed column noise in images acquired b Apparatus for correcting fixed column noise in images acquired b

1996-11-25

1999-11-16

Boudreau, Leo H.

Image analysis

Applications

Personnel identification

382272, 382274, 382275, 382319, 358446, 358463, G06K 928, G06K 940, G06K 946, G06K 960

Patent

active

059871563

ABSTRACT:
A facility is provided for correcting fixed column noise that may appear in a fingerprint image acquired from a capacitive fingerprint sensor. In particular, corrective gain and offset values are determined for each column of pixel signals generated by the sensor and are applied to such signals to greatly diminish the fixed column noise that may be present in that column.

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patent: 5892590 (1999-04-01), Ida et al.
Toshifumi Ozaki, Hajime Kinugasa, Takashi Nishida, A Low-Noise Line-Amplified MOS Imaging Devices, IEEE Publication, 1991, pp. 969-975, 1991.

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