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US09552525B2 Noise reduction in biometric images 有权
生物识别图像中的降噪

Noise reduction in biometric images
Abstract:
A system can include a processing device and a biometric sensing device operatively connected to the processing device. The processing device can be configured to remove noise from a biometric image captured by the biometric sensing device using at least two different calibration images. One calibration image characterizes noise of the biometric sensing device at a first signal level while another calibration image characterizes the noise of the biometric sensing device at a second signal level.
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