62 lines
1.7 KiB
Python
Executable File
62 lines
1.7 KiB
Python
Executable File
#!/usr/bin/python
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import urllib2
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import cv
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from random import randint
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def roundxy(pt):
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return (cv.Round(pt[0]), cv.Round(pt[1]))
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def draw_common(points):
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success, center, radius = cv.MinEnclosingCircle(points)
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if success:
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cv.Circle(img, roundxy(center), cv.Round(radius), cv.CV_RGB(255, 255, 0), 1, cv. CV_AA, 0)
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box = cv.MinAreaRect2(points)
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box_vtx = [roundxy(p) for p in cv.BoxPoints(box)]
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cv.PolyLine(img, [box_vtx], 1, cv.CV_RGB(0, 255, 255), 1, cv. CV_AA)
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def minarea_array(img, count):
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pointMat = cv.CreateMat(count, 1, cv.CV_32SC2)
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for i in range(count):
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pointMat[i, 0] = (randint(img.width/4, img.width*3/4),
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randint(img.height/4, img.height*3/4))
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cv.Zero(img)
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for i in range(count):
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cv.Circle(img, roundxy(pointMat[i, 0]), 2, cv.CV_RGB(255, 0, 0), cv.CV_FILLED, cv. CV_AA, 0)
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draw_common(pointMat)
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def minarea_seq(img, count, storage):
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points = [(randint(img.width/4, img.width*3/4), randint(img.height/4, img.height*3/4)) for i in range(count)]
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cv.Zero(img)
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for p in points:
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cv.Circle(img, roundxy(p), 2, cv.CV_RGB(255, 0, 0), cv.CV_FILLED, cv. CV_AA, 0)
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draw_common(points)
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if __name__ == "__main__":
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img = cv.CreateImage((500, 500), 8, 3)
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storage = cv.CreateMemStorage()
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cv.NamedWindow("rect & circle", 1)
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use_seq = True
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while True:
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count = randint(1, 100)
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if use_seq:
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minarea_seq(img, count, storage)
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else:
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minarea_array(img, count)
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cv.ShowImage("rect & circle", img)
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key = cv.WaitKey() % 0x100
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if key in [27, ord('q'), ord('Q')]:
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break
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use_seq = not use_seq
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