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US08194942B2 Authentication device and authentication method 失效
认证设备和认证方式

Authentication device and authentication method
Abstract:
In view of the fact that the reproducibility of a finger vein pattern is deteriorated in an image of the finger vein due to external scattered light, displacement, change in the amount of blood flow and the like, a multiple-valued pattern matching method is adopted so that such changes can be dealt with by converting a data map itself into a multiple-valued map.
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