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spafe.utils.vis#

Description : Visualization implementation.
Copyright (c) 2019-2023 Ayoub Malek. This source code is licensed under the terms of the BSD 3-Clause License. For a copy, see <https://github.com/SuperKogito/spafe/blob/master/LICENSE>.

spafe.utils.vis.tick_function(X, fb_type)[source]#

Return correct converted ticks.

Parameters

X (numpy.ndarray) – input ticks.
fb_type (str) – filter banks type to choose the correct conversion.

Returns

converted ticks to the correct scale.

Return type

(numpy.ndarray)

spafe.utils.vis.show_fbanks(fbanks, center_freqs, ref_freqs, title='Mel filter banks', ylabel='Weight', x1label='Frequency / Hz', x2label='Frequency / mel', figsize=(12, 5), fb_type='mel', show_center_freqs=True)[source]#

visualize a matrix including the filter banks coordinates. Each row corresponds to a filter.

Parameters

fbanks (numpy.ndarray) – 2d array including the the filter banks coordinates.
ref_freqs (numpy.ndarray) – 1d array reference frequencies
title (str) – plot title. (Default is “Mel filter banks”).
ylabel (str) – y-axis label. (Default is “Weight”).
x1label (str) – lower x-axis label. (Default is “Frequency/ Hz”).
x2label (str) – upper x-axis label. (Default is “Frequency/ mel”).
figsize (tuple) – size of figure. (Default is (12, 5)).
fb_type (str) – type of filter banks. (Default is “mel”).
show_center_freqs (bool) – if true show center frequencies. (Default is True).

spafe.utils.vis.show_spectrogram(spectrogram, fs, xmin, xmax, ymin, ymax, dbf=80.0, xlabel='Time (s)', ylabel='Frequency (Hz)', title='Mel spectrogram (dB)', figsize=(14, 4), cmap='jet', colorbar=True)[source]#

Visualize the spectrogram.

Parameters

feats (numpy.ndarray) – 2d array including the the features coefficients.
fs (int) – sampling rate.
xmin (float) – minimum x-axis value.
xmax (float) – maximum x-axis value.
ymin (float) – minimum y-axis value.
ymax (float) – maximum y-axis value.
dbf (float) – db reference value. (Default is 80.0).
xlabel (str) – x-axis label. (Default is “Time (s)”).
ylabel (str) – y-axis label. (Default is “Frequency (Hz)”).
title (str) – plot title. (Default is “Mel spectrogram (dB)”).
figsize (tuple) – size of figure. (Default is (14, 4)).
cmap (str) – matplotlib colormap to use. (Default is “jet”).
colorbar (bool) – if true add colorbar. (Default is True).

spafe.utils.vis.show_features(feats, title, ylabel, xlabel, figsize=(14, 4), cmap='jet')[source]#

visualize a matrix including the features coefficients. Each row corresponds to a frame.

Parameters

feats (numpy.ndarray) – 2d array including the the features coefficients.
title (str) – plot title.
ylabel (str) – y-axis label.
xlabel (str) – x-axis label.
figsize (tuple) – size of figure. (Default is (14, 4)).
cmap (str) – matplotlib colormap to use. (Default is “jet”).

spafe.utils.spectral