Image analysis – Applications – Personnel identification
Reexamination Certificate
2011-04-12
2011-04-12
Chawan, Sheela C (Department: 2624)
Image analysis
Applications
Personnel identification
C382S124000, C356S028000, C356S512000, C600S458000
Reexamination Certificate
active
07925056
ABSTRACT:
A method for investigating and ascertaining pulse or heartbeat includes directing illuminating radiation to illuminate a body part such as a finger. The illuminating radiation is of a wavelength or wavelength band substantially in the blue light region of the light spectrum. Then, an optical speckle pattern of the illuminated body part resulting from the illumination of the body part is obtained and imaged. The optical speckle pattern is representative of the heartbeat and by correlation of frames extracted from the speckle pattern, the pulse or beat extent of the body part may be ascertained.
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Akkermans Antonius Hermanus Maria
Liedenbaum Coen Theodorus Hubertus Fransiscus
Presura Cristian
Chawan Sheela C
Koninklijke Philips Electronics , N.V.
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