Created
October 22, 2013 03:30
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Haar Wavelet Transform
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class Haar1D(object): | |
def transform(self, data, L): | |
ls = [] | |
level = 0 | |
length = len(data) | |
while level < L: | |
elements = length * pow(2, -level) | |
data = self.getsequence(data, elements) | |
if level > 0: | |
for idx, ii in enumerate(data): | |
ls[idx] = data[idx] | |
else: | |
ls.extend(data) | |
level += 1 | |
return tuple(ls) | |
def getsequence(self, data, length): | |
sequenceAdd = [] | |
sequenceSub = [] | |
idx = 0 | |
while idx < length: | |
sequenceAdd.append(data[idx] + (data[idx + 1])) | |
sequenceSub.append(data[idx] - (data[idx + 1])) | |
idx = idx + 2 | |
sequenceAdd.extend(sequenceSub) | |
return sequenceAdd | |
h = Haar1D() | |
print h.transform((11, 32, 87, 12, 76, 99, 53, 59, 63, 49, 59, 98, 9, 24, 76, 71), 3) |
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