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162 lines
5.4 KiB
Python
Executable File
162 lines
5.4 KiB
Python
Executable File
#! /usr/bin/env python
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from random import Random
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import colorsys
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print "OpenCV Python version of drawing"
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import cv2.cv as cv
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def random_color(random):
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"""
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Return a random color
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"""
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icolor = random.randint(0, 0xFFFFFF)
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return cv.Scalar(icolor & 0xff, (icolor >> 8) & 0xff, (icolor >> 16) & 0xff)
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if __name__ == '__main__':
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# some "constants"
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width = 1000
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height = 700
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window_name = "Drawing Demo"
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number = 100
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delay = 5
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line_type = cv.CV_AA # change it to 8 to see non-antialiased graphics
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# create the source image
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image = cv.CreateImage( (width, height), 8, 3)
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# create window and display the original picture in it
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cv.NamedWindow(window_name, 1)
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cv.SetZero(image)
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cv.ShowImage(window_name, image)
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# create the random number
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random = Random()
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# draw some lines
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for i in range(number):
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pt1 = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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pt2 = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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cv.Line(image, pt1, pt2,
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random_color(random),
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random.randrange(0, 10),
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line_type, 0)
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cv.ShowImage(window_name, image)
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cv.WaitKey(delay)
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# draw some rectangles
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for i in range(number):
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pt1 = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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pt2 = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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cv.Rectangle(image, pt1, pt2,
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random_color(random),
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random.randrange(-1, 9),
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line_type, 0)
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cv.ShowImage(window_name, image)
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cv.WaitKey(delay)
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# draw some ellipes
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for i in range(number):
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pt1 = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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sz = (random.randrange(0, 200),
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random.randrange(0, 200))
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angle = random.randrange(0, 1000) * 0.180
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cv.Ellipse(image, pt1, sz, angle, angle - 100, angle + 200,
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random_color(random),
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random.randrange(-1, 9),
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line_type, 0)
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cv.ShowImage(window_name, image)
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cv.WaitKey(delay)
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# init the list of polylines
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nb_polylines = 2
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polylines_size = 3
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pt = [0,] * nb_polylines
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for a in range(nb_polylines):
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pt [a] = [0,] * polylines_size
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# draw some polylines
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for i in range(number):
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for a in range(nb_polylines):
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for b in range(polylines_size):
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pt [a][b] = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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cv.PolyLine(image, pt, 1,
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random_color(random),
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random.randrange(1, 9),
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line_type, 0)
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cv.ShowImage(window_name, image)
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cv.WaitKey(delay)
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# draw some filled polylines
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for i in range(number):
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for a in range(nb_polylines):
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for b in range(polylines_size):
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pt [a][b] = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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cv.FillPoly(image, pt,
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random_color(random),
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line_type, 0)
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cv.ShowImage(window_name, image)
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cv.WaitKey(delay)
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# draw some circles
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for i in range(number):
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pt1 = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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cv.Circle(image, pt1, random.randrange(0, 300),
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random_color(random),
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random.randrange(-1, 9),
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line_type, 0)
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cv.ShowImage(window_name, image)
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cv.WaitKey(delay)
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# draw some text
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for i in range(number):
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pt1 = (random.randrange(-width, 2 * width),
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random.randrange(-height, 2 * height))
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font = cv.InitFont(random.randrange(0, 8),
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random.randrange(0, 100) * 0.05 + 0.01,
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random.randrange(0, 100) * 0.05 + 0.01,
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random.randrange(0, 5) * 0.1,
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random.randrange(0, 10),
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line_type)
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cv.PutText(image, "Testing text rendering!",
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pt1, font,
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random_color(random))
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cv.ShowImage(window_name, image)
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cv.WaitKey(delay)
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# prepare a text, and get it's properties
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font = cv.InitFont(cv.CV_FONT_HERSHEY_COMPLEX,
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3, 3, 0.0, 5, line_type)
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text_size, ymin = cv.GetTextSize("OpenCV forever!", font)
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pt1 = ((width - text_size[0]) / 2, (height + text_size[1]) / 2)
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image2 = cv.CloneImage(image)
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# now, draw some OpenCV pub ;-)
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for i in range(0, 512, 2):
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cv.SubS(image2, cv.ScalarAll(i), image)
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(r, g, b) = colorsys.hsv_to_rgb((i % 100) / 100., 1, 1)
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cv.PutText(image, "OpenCV forever!",
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pt1, font, cv.RGB(255 * r, 255 * g, 255 * b))
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cv.ShowImage(window_name, image)
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cv.WaitKey(delay)
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# wait some key to end
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cv.WaitKey(0)
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