Method and apparatus for detecting liveness based on phase difference
AssigneeSamsung Electronics Co., Ltd.
InventorsSolae LEE, Youngjun KWAK, Sungheon PARK, Byung In YOO, Yong-Il LEE, Hana LEE, Jiho CHOI
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Abstract
A method and apparatus for detecting a liveness based on a phase difference are provided. The method includes generating a first phase image based on first visual information of a first phase, generating a second phase image based on second visual information of a second phase, generating a minimum map based on a disparity between the first phase image and the second phase image, and detecting a liveness based on the minimum map.
Claims24
A liveness detection method based on a phase difference, the liveness detection method comprising:
- generating a first phase image based on first visual information of a first phase sensed by a first pixel group of an image sensor;
- generating a second phase image based on second visual information of a second phase sensed by a second pixel group of the image sensor;
- generating a minimum map based on a disparity between the first phase image and the second phase image;
- and
- detecting a liveness based on the minimum map.
A liveness detection apparatus based on a phase difference, the liveness detection apparatus comprising:
- a processor;
- and
- a memory comprising instructions executable by the processor,
- wherein in response to the instructions being executed by the processor, the processor is configured to:
- generate a first phase image based on first visual information of a first phase sensed by a first pixel group of an image sensor;
- generate a second phase image based on second visual information of a second phase sensed by a second pixel group of the image sensor;
- generate a minimum map based on a disparity between the first phase image and the second phase image;
- and
- detect a liveness based on the minimum map.
An electronic apparatus comprising:
- an image sensor configured to sense first visual information of a first phase using a first pixel group and to sense second visual information of a second phase using a second pixel group;
- and
- a processor configured to generate a first phase image based on the first visual information, to generate a second phase image based on the second visual information, to generate a minimum map based on a disparity between the first phase image and the second phase image, and to detect a liveness based on the minimum map.
A liveness detection apparatus based on a phase difference, the liveness detection apparatus comprising:
- a multiphase detection sensor configured to generate a first phase image by sensing first visual information of a first phase using a first pixel group and to generate a second phase image by sensing second visual information of a second phase using a second pixel group;
- a multiphase patch generator configured to generate a minimum map based on a disparity between the first phase image and the second phase image;
- and
- a liveness detector configured to detect a liveness based on the minimum map.
Dependencies are inferred from the claim text.