def average_power(args):
"""
Average power = sum of PSD (in decibel) divided by number of pixels
:param args:
:return:
"""
psddb = get_psddb(args)
return np.sum(psddb) / np.size(psddb)
def max_power(args):
"""
Max power is the darkest pixel in the spectrogram
:param args:
:return:
"""
psddb = get_psddb(args)
return np.max(psddb)
def average_frame_power(args):
"""
Average power = sum of PSD (in decibel) divided by number of pixels
:param args:
:return:
"""
psddb = get_psddb(args)
return np.mean(psddb, axis=0)
def dominant_frequency(args):
"""
Dominant frequency is the frequency at which max power occurs
:param args:
:return:
"""
psddb = get_psddb(args)
fs = args['fs']
max_indices = np.argmax(psddb, axis=0)
nyquist = fs / 2.0
return max_indices / psddb.shape[0] * nyquist
def max_frequency(args):
"""
Max frequency is the frequency at which max power occurs
:param args:
:return: float: max frequency over the entire duration
"""
psddb = get_psddb(args)
fs = args['fs']
max_index = np.argmax(np.max(psddb, axis=1))
nyquist = fs / 2.0
return max_index / psddb.shape[0] * nyquist