46 lines
1.1 KiB
Python
Executable File
46 lines
1.1 KiB
Python
Executable File
from functools import wraps
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import cv2
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import numpy as np
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def image_required(fun):
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@wraps(fun)
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def wrapper(self, *args, **kwargs):
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if self.image is None:
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raise RuntimeError('Property {}.{} requires an image!'
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.format(self.__class__.__name__, fun.__name__))
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return fun(self, *args, **kwargs)
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return wrapper
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class imgrate:
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def __init__(self, imgfile=None):
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self.image = None
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if imgfile:
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self.load_image(imgfile)
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def load_image(self, imgfile):
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image = cv2.imread(imgfile)
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self.image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
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@property
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@image_required
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def quality(self):
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return self.laplacian * self.fdibm
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@property
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@image_required
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def laplacian(self):
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return cv2.Laplacian(self.image, cv2.CV_64F).var()
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@property
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@image_required
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def fdibm(self):
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F = np.fft.fft2(self.image)
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Fcentered = np.fft.fftshift(F)
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Fabs = np.abs(Fcentered)
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Fmax = Fabs.max()
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Th = np.count_nonzero(Fabs > Fmax/1000)
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return Th / (F.shape[0] * F.shape[1])
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