Determining position of a personal care device relative to body surface

A non-transitory computer-readable medium having stored thereon computer-executable instructions configured to cause a computer system comprising one or more computing devices to perform steps comprising:

• obtaining a digital 3-dimensional model of a human body surface, wherein portions of the human body surface correspond to reference points in the digital 3-dimensional model;
• obtaining image data of a personal care device and image data of the human body surface on which the digital 3-dimensional model is based, wherein the image data of the personal care device and the image data of the human body surface is captured by one or more cameras of a computing device separate from the personal care device;
• based at least in part on the image data of the human body surface, calculating a relative location of the personal care device relative to the reference points;
• determining a true position of the personal care device with respect to the human body surface based at least in part on the image data of the personal care device, pre-determined physical dimensions of the personal care device, and the relative location of the personal care device;
• and
• based on the true position of the personal care device, cause an interaction of the personal care device with the human body surface, wherein the interaction includes application of a cosmetic product or administration of a skin therapy.

A personal care device comprising one or more sensors, at least one processor, and memory, the memory having stored therein computer-executable instructions configured to cause the personal care device to perform steps comprising:

• obtaining, via the one or more sensors, sensor data with respect to a human body surface on which a digital 3-dimensional model is based, wherein portions of the human body surface correspond to reference points in the digital 3-dimensional model;
• based at least in part on the sensor data obtained via the one or more sensors, calculating a relative location of the personal care device relative to the reference points in the digital 3-dimensional model;
• and
• determining a true position of the personal care device with respect to the human body surface based at least in part on image data of the personal care device in use, pre-determined physical dimensions of the personal care device, and the relative location of the personal care device, wherein the image data of the personal care device is captured by one or more cameras of a computing device separate from the personal care device;
• and
• based on the true position of the personal care device, performing application of a cosmetic product, or detection of a skin feature, or administration of a therapy.

A system comprising:

• a surface features unit operably coupled to a plurality of sensors, the surface features unit including computational circuitry and at least one processor configured to obtain sensor data with respect to a human body surface, and generate a digital representation on a display of a 3-dimensional model including a plurality of reference locations on a human body surface;
• and
• a locator unit operably coupled to the surface features unit and a personal care device, the locator unit including computational circuitry and at least one processor configured to
• determine a location of a personal care device relative to one or more of the plurality of reference locations on the human body surface;
• and
• determine a true position of the personal care device relative to the human body surface based at least in part on image data of the personal care device in use, pre-determined physical dimensions of the personal care device, and the relative location of the personal care device, wherein the image data of the personal care device is captured by one or more cameras of a computing device separate from the personal care device;
• and
• circuitry configured to cause an interaction of the personal care device with a corresponding portion of the human body surface, wherein the interaction includes application of a cosmetic product or administration of a skin therapy.