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Continue even if scipy.fftpack is missing #8

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Continue even if scipy.fftpack is missing #8

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14 changes: 13 additions & 1 deletion imagehash/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -32,8 +32,17 @@

from PIL import Image
import numpy
import scipy.fftpack

"""
Try to import the scipy.fftpack module. If it is not available pHash will not work, but one can still use aHash and dHash.
"""
try:
import scipy.fftpack
havefftpack = True
except ImportError:
havefftpack = False


def binary_array_to_hex(arr):
h = 0
s = []
Expand Down Expand Up @@ -116,6 +125,9 @@ def average_hash(image, hash_size=8):
@image must be a PIL instance.
"""
def phash(image, hash_size=32):
if (havefftpack == False):
import scipy.fftpack

image = image.convert("L").resize((hash_size, hash_size), Image.ANTIALIAS)
pixels = numpy.array(image.getdata(), dtype=numpy.float).reshape((hash_size, hash_size))
dct = scipy.fftpack.dct(pixels)
Expand Down