mirror of
https://github.com/wassname/scikit-image.git
synced 2026-06-29 03:54:28 +08:00
François Boulogne
96 lines
1.9 KiB
Python
96 lines
1.9 KiB
Python
"""
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======
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Shapes
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======
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This example shows how to draw several different shapes:
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* line
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* Bezier curve
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* polygon
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* circle
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* ellipse
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"""
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import numpy as np
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import matplotlib.pyplot as plt
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from skimage.draw import (line, polygon, circle,
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circle_perimeter,
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ellipse, ellipse_perimeter,
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bezier_curve)
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import math
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img = np.zeros((500, 500, 3), dtype=np.uint8)
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# draw line
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rr, cc = line(120, 123, 20, 400)
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img[rr, cc, 0] = 255
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# fill polygon
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poly = np.array((
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(300, 300),
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(480, 320),
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(380, 430),
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(220, 590),
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(300, 300),
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))
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rr, cc = polygon(poly[:, 0], poly[:, 1], img.shape)
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img[rr, cc, 1] = 255
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# fill circle
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rr, cc = circle(200, 200, 100, img.shape)
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img[rr, cc, :] = (255, 255, 0)
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# fill ellipse
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rr, cc = ellipse(300, 300, 100, 200, img.shape)
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img[rr, cc, 2] = 255
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# circle
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rr, cc = circle_perimeter(120, 400, 15)
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img[rr, cc, :] = (255, 0, 0)
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# Bezier curve
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rr, cc = bezier_curve(70, 100, 10, 10, 150, 100, 1)
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img[rr, cc, :] = (255, 0, 0)
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# ellipses
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rr, cc = ellipse_perimeter(120, 400, 60, 20, orientation=math.pi / 4.)
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img[rr, cc, :] = (255, 0, 255)
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rr, cc = ellipse_perimeter(120, 400, 60, 20, orientation=-math.pi / 4.)
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img[rr, cc, :] = (0, 0, 255)
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rr, cc = ellipse_perimeter(120, 400, 60, 20, orientation=math.pi / 2.)
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img[rr, cc, :] = (255, 255, 255)
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plt.imshow(img)
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plt.show()
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"""
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Anti-aliased drawing for:
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* line
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* circle
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"""
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import numpy as np
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import matplotlib.pyplot as plt
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from skimage.draw import (line_aa,
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circle_perimeter_aa)
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img = np.zeros((100, 100), dtype=np.uint8)
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# anti-aliased line
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rr, cc, val = line_aa(12, 12, 20, 50)
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img[rr, cc] = val * 255
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# anti-aliased circle
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rr, cc, val = circle_perimeter_aa(60, 40, 30)
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img[rr, cc] = val * 255
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plt.imshow(img, cmap=plt.cm.gray, interpolation='nearest')
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plt.title('Anti-aliasing')
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plt.show()
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