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Moved autofocus plugin to its own module

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Joel Collins 2019-01-30 13:51:20 +00:00
parent a6791d55ac
commit 4450ee132e
5 changed files with 4 additions and 27 deletions
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21
openflexure_microscope/plugins/default/focus_utils.py
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import numpy as np
from scipy import ndimage
def decimate_to(shape, image):
"""Decimate an image to reduce its size if it's too big."""
decimation = np.max(np.ceil(np.array(image.shape, dtype=np.float)[:len(shape)]/np.array(shape)))
return image[::int(decimation), ::int(decimation), ...]
def sharpness_sum_lap2(rgb_image):
"""Return an image sharpness metric: sum(laplacian(image)**")"""
#image_bw=np.mean(decimate_to((1000,1000), rgb_image),2)
image_bw=np.mean(rgb_image, 2)
image_lap=ndimage.filters.laplace(image_bw)
return np.mean(image_lap.astype(np.float)**4)
def sharpness_edge(image):
"""Return a sharpness metric optimised for vertical lines"""
gray = np.mean(image.astype(float), 2)
n = 20
edge = np.array([[-1]*n + [1]*n])
return np.sum([np.sum(ndimage.filters.convolve(gray,W)**2) for W in [edge, edge.T]])