Monitoring assistance system, control method thereof, and program
AssigneeOMRON Corporation
InventorsKiyoaki Tanaka, Jumpei Matsunaga, Shinji Takahashi, Tatsuya Murakami
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Abstract
In a watching assistance system that assists watching over a subject on a bed, a region setting unit performs processing of receiving a region setting image captured by an imaging device, specifying an approximate position of the bed from the region setting image by object detection, and specifying a bed region by extracting a contour of the bed from a local range including the approximate position.
Claims4
A watching assistance system that assists watching over a subject on a bed, the watching assistance system comprising:
- an image acquisition unit configured to acquire an image captured by an imaging device;
- a region setting unit configured to set at least one determination region in the image based on a bed region;
- a detector configured to detect the subject from the image acquired by the image acquisition unit;
- a determination unit configured to determine a state of the subject based on a relationship between the determination region and a position at which the subject is detected;
- and
- an output unit configured to provide notification according to a determination result of the determination unit,
- wherein the region setting unit
- receives a region setting image looking down on the entire bed from diagonally above the bed, from the image acquisition unit,
- detects two corners of the bed from the region setting image by object detection,
- sets two local ranges respectively including the two corners,
- detects a line segment starting at a corner in a local range, for each of the two local ranges, and
- specifies, as the bed region, a region surrounded by a quadrangular contour defined by two corners and two line segments.
A method for controlling a watching assistance system that assists watching over a subject on a bed, the watching assistance system control method comprising:
- a step of acquiring an image captured by an imaging device;
- a step of setting at least one determination region in the image based on a bed region;
- a step of detecting the subject from the acquired image;
- a step of determining a state of the subject based on a relationship between the determination region and a position at which the subject is detected;
- and
- a step of providing notification according to a determination result of the state of the subject,
- wherein the determination region setting step includes:
- a step of receiving a region setting image looking down on the entire bed from diagonally above the bed, from the image acquisition unit;
- a step of detecting two corners of the bed from the region setting image by object detection;
- a step of setting two local ranges respectively including the two corners;
- a step of detecting a line segment starting at a corner included in a local range, for each of the two local ranges;
- and
- a step of specifying, as the bed region, a region surrounded by a quadrangular contour defined by two corners and two line segments.
Dependencies are inferred from the claim text.