摘要
The instant disclosure provides a data augmentation method for expanding a dataset. The dataset includes a plurality of spectrograms. The data augmentation method includes: selecting at least one patch within a first spectrogram of the plurality of spectrograms; determining at least one adjustment value corresponding to the at least one patch within the first spectrogram; and adjusting the at least one patch within the first spectrogram, based on the at least one adjustment value, to obtain a first adjusted spectrogram, where the at least one adjustment value includes at least one of a contrast adjustment value, a brightness adjustment value, and a gamma adjustment value.