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slice.py
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slice.py
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from PIL import Image
import os.path
from config import spectrogramsPath, slicesPath
ClassDict = {'Pop': 0,
'Instrumental': 1,
'Hip-Hop': 2,
'Experimental': 3,
'Electronic': 4,
'Folk': 5,
'Rock': 6,
'International': 7}
#Slices all spectrograms
def createSlicesFromSpectrograms(desiredSize):
for k, v in ClassDict.items():
for currentDir, subdirList, fileList in os.walk(spectrogramsPath+k):
for filename in fileList:
sliceSpectrogram(filename,desiredSize, k)
#Creates slices from spectrogram
def sliceSpectrogram(filename, desiredSize, genre):
# Load the full spectrogram
img = Image.open(spectrogramsPath+genre+'/'+filename)
#Compute approximate number of 128x128 samples
width, height = img.size
nbSamples = int(width/desiredSize)
width - desiredSize
#Create path if not existing
print("About to create Slices for file {}".format(nbSamples))
#For each sample
for i in range(10):
print("Creating slice: ", (i+1), "/", nbSamples, "for", genre, filename)
#Extract and save 128x128 sample
startPixel = i*desiredSize
imgTmp = img.crop((startPixel, 1, startPixel + desiredSize, desiredSize + 1))
imgTmp.save(slicesPath+"{}/{}_{}".format(genre, i, filename))