Pulse estimation device, pulse estimation system, and pulse estimation method

A pulse estimation method of estimating a pulse of a subject from information obtained without contact with the subject, the pulse estimation method comprising:

• inputting time-sequential captured images including at least a portion of the subject as an object from a camera;
• extracting a skin-color region from each of the captured images;
• transmitting a zoom command to the camera that has imaged the captured images or a user of the camera in order to change a size of the skin-color region such that the size of the skin-color region satisfies a preset reference range;
• and
• estimating the pulse of the subject based on the skin-color region of the captured images obtained by imaging with the camera, after the zoom command is transmitted,
• wherein the pulse estimation method further comprises:
• estimating the pulse of the subject based on the captured images before the zoom command is transmitted, and determining whether or not the estimated pulse is stable, and
• in a case where the estimated pulse is not stable, transmitting the zoom command.

A pulse estimation device that estimates a pulse of a subject from information obtained without contact with the subject, the pulse estimation device comprising:

• a processor;
• a memory including instructions that, when executed by the processor, cause the processor to perform operations including:
• inputting time-sequential captured images including at least a portion of the subject as an object from a camera;
• extracting a skin-color region from each of the captured images;
• transmitting a zoom command to the camera that has imaged the captured images or a user of the camera in order to adjust a size of the skin-color region;
• and
• estimating the pulse of the subject based on the skin-color region of the captured images obtained by imaging with the camera, after the zoom command is transmitted,
• wherein the operations further include determining whether or not the size of the skin-color region satisfies a preset reference range,
• in a case that the size of the skin-color region does not satisfy the preset reference range, transmitting the zoom command to the camera or the user of the camera, and
• the operations even further include:
• determining the size of the skin-color region based on a number of pixels constituting the skin-color region of the captured image;
• and
• determining whether or not the size of the skin-color region satisfies the preset reference range based on the number of pixels.

A pulse estimation method of estimating a pulse of a subject from information obtained without contact with the subject, the pulse estimation method comprising:

• inputting time-sequential captured images including at least a portion of the subject as an object from a camera;
• extracting a skin-color region from each of the captured images;
• transmitting a zoom command to the camera that has imaged the captured images or a user of the camera in order to change a size of the skin-color region such that the size of the skin-color region satisfies a preset reference range;
• and
• estimating the pulse of the subject based on the skin-color region of the captured images obtained by imaging with the camera, after the zoom command is transmitted,
• wherein the pulse estimation method further comprises determining whether or not the size of the skin-color region satisfies a preset reference range,
• in a case that the size of the skin-color region does not satisfy the preset reference range, transmitting the zoom command to the camera or the user of the camera, and
• the pulse estimation method even further comprises:
• determining the size of the skin-color region based on a number of pixels constituting the skin-color region of the captured image;
• and
• determining whether or not the size of the skin-color region satisfies the preset reference range based on the number of pixels.

A pulse estimation device that estimates a pulse of a subject from information obtained without contact with the subject, the pulse estimation device comprising:

• a processor;
• a memory including instructions that, when executed by the processor, cause the processor to perform operations including:
• inputting time-sequential captured images including at least a portion of the subject as an object from a camera;
• extracting a skin-color region from each of the captured images;
• transmitting a zoom command to the camera that has imaged the captured images or a user of the camera in order to adjust a size of the skin-color region;
• and
• estimating the pulse of the subject based on the skin-color region of the captured images obtained by imaging with the camera, after the zoom command is transmitted,
• wherein the operations further include determining whether or not the size of the skin-color region satisfies a preset reference range,
• in a case that the size of the skin-color region does not satisfy the preset reference range, transmitting the zoom command to the camera or the user of the camera, and
• the operations even further include changing the preset reference range according to a performance of an image sensor of the camera.

A pulse estimation method of estimating a pulse of a subject from information obtained without contact with the subject, the pulse estimation method comprising:

• inputting time-sequential captured images including at least a portion of the subject as an object from a camera;
• extracting a skin-color region from each of the captured images;
• transmitting a zoom command to the camera that has imaged the captured images or a user of the camera in order to change a size of the skin-color region such that the size of the skin-color region satisfies a preset reference range;
• and
• estimating a pulse of the subject based on the skin-color region of the captured images obtained by imaging with the camera, after the zoom command is transmitted,
• wherein the pulse estimation method further comprises determining whether or not the size of the skin-color region satisfies a preset reference range,
• in a case that the size of the skin-color region does not satisfy the preset reference range, transmitting the zoom command to the camera or the user of the camera, and
• the pulse estimation method even further comprises changing the preset reference range according to a performance of an image sensor of the camera.