Open Source Computer Vision Library
https://opencv.org/
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71 lines
1.8 KiB
71 lines
1.8 KiB
#!/usr/bin/env python |
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# Python 2/3 compatibility |
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from __future__ import print_function |
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import numpy as np |
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from numpy import pi, sin, cos |
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import cv2 |
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defaultSize = 512 |
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class TestSceneRender(): |
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def __init__(self, bgImg = None, deformation = False, **params): |
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self.time = 0.0 |
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self.timeStep = 1.0 / 30.0 |
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self.deformation = deformation |
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if bgImg != None: |
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self.sceneBg = bgImg.copy() |
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else: |
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self.sceneBg = np.zeros((defaultSize, defaultSize, 3), np.uint8) |
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self.w = self.sceneBg.shape[0] |
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self.h = self.sceneBg.shape[1] |
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self.initialRect = np.array([ (self.h/2, self.w/2), (self.h/2, self.w/2 + self.w/10), |
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(self.h/2 + self.h/10, self.w/2 + self.w/10), (self.h/2 + self.h/10, self.w/2)]).astype(int) |
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self.currentRect = self.initialRect |
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def setInitialRect(self, rect): |
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self.initialRect = rect |
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def getCurrentRect(self): |
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x0, y0 = self.currentRect[0] |
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x1, y1 = self.currentRect[2] |
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return np.array([x0, y0, x1, y1]) |
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def getNextFrame(self): |
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self.time += self.timeStep |
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img = self.sceneBg.copy() |
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self.currentRect = self.initialRect + np.int( 30*cos(self.time) + 50*sin(self.time/3)) |
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if(self.deformation): |
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self.currentRect[1:3] += np.int(self.h/20*cos(self.time)) |
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cv2.fillConvexPoly(img, self.currentRect, (0, 0, 255)) |
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return img |
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def resetTime(self): |
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self.time = 0.0 |
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if __name__ == '__main__': |
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backGr = cv2.imread('../../../samples/data/lena.jpg') |
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render = TestSceneRender(backGr) |
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while True: |
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img = render.getNextFrame() |
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cv2.imshow('img', img) |
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ch = 0xFF & cv2.waitKey(3) |
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if ch == 27: |
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break |
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cv2.destroyAllWindows() |