mirror of
https://github.com/wassname/scikit-image.git
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emmanuelle
55f5103dd8
Modified travis_script.sh to account for the new structure of the gallery Added README.txt files in directories of gallery examples Fixed references to gallery images in user guide pages Fixed broken links
50 lines
1.3 KiB
Python
50 lines
1.3 KiB
Python
"""
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=========================
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Measure region properties
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=========================
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This example shows how to measure properties of labelled image regions.
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"""
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import math
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import matplotlib.pyplot as plt
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import numpy as np
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from skimage.draw import ellipse
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from skimage.measure import label, regionprops
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from skimage.transform import rotate
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image = np.zeros((600, 600))
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rr, cc = ellipse(300, 350, 100, 220)
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image[rr, cc] = 1
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image = rotate(image, angle=15, order=0)
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label_img = label(image)
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regions = regionprops(label_img)
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fig, ax = plt.subplots()
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ax.imshow(image, cmap=plt.cm.gray)
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for props in regions:
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y0, x0 = props.centroid
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orientation = props.orientation
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x1 = x0 + math.cos(orientation) * 0.5 * props.major_axis_length
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y1 = y0 - math.sin(orientation) * 0.5 * props.major_axis_length
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x2 = x0 - math.sin(orientation) * 0.5 * props.minor_axis_length
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y2 = y0 - math.cos(orientation) * 0.5 * props.minor_axis_length
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ax.plot((x0, x1), (y0, y1), '-r', linewidth=2.5)
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ax.plot((x0, x2), (y0, y2), '-r', linewidth=2.5)
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ax.plot(x0, y0, '.g', markersize=15)
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minr, minc, maxr, maxc = props.bbox
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bx = (minc, maxc, maxc, minc, minc)
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by = (minr, minr, maxr, maxr, minr)
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ax.plot(bx, by, '-b', linewidth=2.5)
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ax.axis((0, 600, 600, 0))
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plt.show()
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