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Fig. 3 | EURASIP Journal on Advances in Signal Processing

Fig. 3

From: Classification of audio signals using spectrogram surfaces and extrinsic distortion measures

Fig. 3

Visualization of the process of measuring distortions associated with the parametrization problem. The figure depicts, from left to right: a sound spectrogram, a triangular mesh \((\mathcal {V},\Im )\) representation of the spectrogram surface, an initial mapping of \((\mathcal {V},\Im )\) onto the plane and the final flattening of the mesh, computed by means of the ABCD algorithm

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