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US 11,636,705 B2Granted
Method and apparatus for preprocessing fingerprint image
AssigneeSamsung Electronics Co., Ltd.
InventorsHuijin Lee, Jingu Heo
Life of this patent
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Abstract
Provided in a fingerprint image preprocessing method including receiving an input fingerprint image, performing a short-time Fourier transform (STFT) on the input fingerprint image to obtain a transformed fingerprint image, comparing the input fingerprint image and the transformed fingerprint image, and generating a combined image by combining the input fingerprint image and the transformed fingerprint image based on a result of the comparing.
Claims19
A fingerprint image preprocessing method comprising:
- receiving an input fingerprint image;
- performing a short-time Fourier transform (STFT) on the input fingerprint image to obtain a transformed fingerprint image;
- comparing the input fingerprint image and the transformed fingerprint image;
- and
- generating a combined image by combining the input fingerprint image and the transformed fingerprint image based on a result of the comparing,
- wherein the comparing comprises comparing a pixel value of a pixel in the input fingerprint image and a pixel value of a corresponding pixel in the transformed fingerprint image, and
- wherein the generating comprises applying, to a corresponding pixel in the combined image, a result value of combining the input fingerprint image and the transformed fingerprint image or a pixel value of the transformed fingerprint image based on the result of the comparing.
4 more elements
A fingerprint image preprocessing apparatus comprising:
- a processor;
- and
- a memory configured to store an instruction to operate the processor,
- wherein the processor is configured to:
- receive an input fingerprint image;
- perform a short-time Fourier transform (STFT) on the input fingerprint image to obtain a transformed fingerprint image;
- compare the input fingerprint image and the transformed fingerprint image;
- generate a combined image by combining the input fingerprint image and the transformed fingerprint image based on a result of the comparing;
- wherein the processor is further configured to:
- compare a pixel value of a pixel in the input fingerprint image and a pixel value of a corresponding pixel in the transformed fingerprint image, and
- apply, to a corresponding pixel in the combined image, a result value of combining the input fingerprint image and the transformed fingerprint image or a pixel value of the transformed fingerprint image based on the result of the comparing.
8 more elements
A computing apparatus comprising:
- a fingerprint sensor configure to obtain an input fingerprint image;
- and
- a processor configured to perform a fingerprint verification based on the input fingerprint image,
- wherein the processor is configured to:
- perform a short-time Fourier transform (STFT) on the input fingerprint image to obtain a transformed fingerprint image;
- compare the input fingerprint image and the transformed fingerprint image;
- generate a combined image by combining the input fingerprint image and the transformed fingerprint image based on a result of the comparing;
- wherein the processor is further configured to:
- compare a pixel value of a pixel in the input fingerprint image and a pixel value of a corresponding pixel in the transformed fingerprint image, and
- apply, to a corresponding pixel in the combined image, a result value of combining the input fingerprint image and the transformed fingerprint image or a pixel value of the transformed fingerprint image based on the result of the comparing.
7 more elements
Dependencies are inferred from the claim text.