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US 11,106,918 B2Granted
Abnormality detection device and abnormality detection method
AssigneeNEC Corporation
InventorHiroo Ikeda
Life of this patent
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Abstract
An image processing device (100) includes a change detection unit (101) that detects a target state change in a person on the basis of an input image, and a determination unit (102) that determines an abnormal state in accordance with a detection obtained by detecting occurrences of the target state change in a plurality of persons.
Claims18
An abnormality detection method implemented by a computer, the method comprising:
- detecting a target state change in a person on the basis of an input image, wherein the target state change including at least one of:
- looking back, looking up, covering head with an arm or a hand, pointing with a finger, taking a picture, running away, jumping up, frowning, closing eyes, looking surprised, blushing, blanching, nose pinching, cellular phone operation, and hand waving;
- calculating a relative distance between each pair of persons of the plurality of persons in the input image;
- detecting occurrences of the target state change in a plurality of persons whose relative distance is closer than a predetermined distance;
- and
- determining an abnormal state in accordance with detecting the occurrences of the target state change in the plurality of persons.
3 more elements
An abnormality detection system, comprising:
- at least one memory storing instructions;
- one or more processors configured to process the instructions to perform:
- detecting a target state change in a person on the basis of an input image, wherein the target state change including at least one of:
- looking back, looking up, covering head with an arm or a hand, pointing with a finger, taking a picture, running away, jumping up, frowning, closing eyes, looking surprised, blushing, blanching, nose pinching, cellular phone operation, and hand waving;
- calculating a relative distance between each pair of persons of the plurality of persons in the input image;
- detecting occurrences of the target state change in a plurality of persons whose relative distance is closer than a predetermined distance;
- and
- determining an abnormal state in accordance with detecting the occurrences of the target state change in the plurality of persons.
5 more elements
A non-transitory computer readable storage medium storing a program causing a computer to execute:
- detecting a target state change in a person on the basis of an input image, wherein the target state change including at least one of:
- looking back, looking up, covering head with an arm or a hand, pointing with a finger, taking a picture, running away, jumping up, frowning, closing eyes, looking surprised, blushing, blanching, nose pinching, cellular phone operation, and hand waving;
- calculating a relative distance between each pair of persons of the plurality of persons in the input image;
- detecting occurrences of the target state change in a plurality of persons whose relative distance is closer than a predetermined distance;
- and
- determining an abnormal state in accordance with detecting the occurrences of the target state change in the plurality of persons.
3 more elements
Dependencies are inferred from the claim text.