A method, performed by an accessory device, for processing calibration data, the accessory device comprising a camera, an image processor, a memory, and a display, the method comprising:
- capturing, using the camera of the accessory device, an image of a portion of a user's body that includes the user's stoma and at least two reference locations selected from a group of reference locations including:
- a feature of the user's body at a location spaced apart from the stoma;
- and
- a mark applied to the user's body;
- storing distance scale information representative of a distance between the two reference locations;
- processing the captured image, including:
- identifying, using an object recognition algorithm, the reference locations;
- identifying, using the object recognition algorithm, the stoma;
- generating calibration data, including one or more of stoma size data, stoma orientation data, stoma shape data, and stoma location data, wherein the calibration data is representative of one or more stoma parameters as a function of the identified reference locations, identified stoma, and the distance scale information;
- and
- storing the calibration data;
- generating, based on the calibration data, an indicia representative of a cutting line that defines a hole to be formed for receiving the identified stoma;
- and
- displaying, via the display of the accessory device, the indicia to the user.