A color filter with low color shift is defined by a light leakage spectrum in the dark state. The method also compares the thermogram against a prior thermogram of the same foot, and produces output information indicating the emergence of an ulcer on a given portion on the at least one foot as a function of 1) whether the thermogram is determined to present the at least one pattern, and 2) the comparison with the prior thermogram, which shows non-ulcerated tissue at the given location. The device includes at least one pusher part that is movable between a refracted position and an extracted position in which the pusher part keeps the cover in a partially open position. That is, the CPU prohibits a capturing operation, and registers all the attribute information of the recorded image in a management table, and the recorder performs an image acquiring operation referring to the management table. In accordance with this embodiment, the attachable mouthpiece spout also includes a flared mouth guard extending from and around the tube. Each of the distribution target positions corresponds to an authorization key.