| 摘要 |
<p>A classification apparatus includes: a spectrogram generation unit (12) that generates a spectrogram of a time variation signal of a classification object by processing the time variation signal of the classification object obtained by a sensor; a two-dimensional Fourier transform calculation unit (22) that calculates a two-dimensional Fourier transform of the generated spectrogram; a similarity calculation unit (28) that calculates a similarity between an template image and an image of the obtained two-dimensional Fourier transform, for each template image corresponding to each phenomenon stored in the template image memorizing unit (DB30); and a determination unit (24) that determines whether the time variation signal of the classification object conforms to any of one or more phenomena, on the basis of the calculated similarity. SIGNAL IPUT UI 10 SPECTROGRAM GENERATION 12 UNIT PREPROCESSING UNIT BAND PASS FILTER 16 NONLNEAR CONVERSION UNIT 18 BINARIZATION UNIT 20 TWO -DIMENSIONAL FOURIER 22 TRANSFORM UNIT PERODICITY CHARACTERISTIC -26 -24 DETECTION UNIT PERIODICITY CHARACTERISTIC BASE IMAGE BASE CHARACTERISTIC CLASSIFICATION UNIT CLASSIFICATION UNIT IMAGE DB DB CLASSIFICATION PROCESSING UNIT</p> |
