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‎blog21-pyrDown/Lena.png‎

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‎blog21-pyrDown/blog21-image02.py‎

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# -*- coding: utf-8 -*-
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import cv2
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import numpy as np
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import matplotlib.pyplot as plt
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#读取原始图像
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img = cv2.imread('people.png')
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#图像向下取样
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r1 = cv2.pyrDown(img)
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r2 = cv2.pyrDown(r1)
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r3 = cv2.pyrDown(r2)
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#显示图像
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cv2.imshow('original', img)
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cv2.imshow('PyrDown1', r1)
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cv2.imshow('PyrDown2', r2)
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cv2.imshow('PyrDown3', r3)
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cv2.waitKey()
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cv2.destroyAllWindows()

‎blog21-pyrDown/blog21-image03.py‎

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# -*- coding: utf-8 -*-
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import cv2
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import numpy as np
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import matplotlib.pyplot as plt
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#读取原始图像
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img = cv2.imread('lena.png')
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#图像向上取样
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r = cv2.pyrUp(img)
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#显示图像
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cv2.imshow('original', img)
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cv2.imshow('PyrUp', r)
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cv2.waitKey()
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cv2.destroyAllWindows()

‎blog21-pyrDown/blog21-image04.py‎

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# -*- coding: utf-8 -*-
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import cv2
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import numpy as np
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import matplotlib.pyplot as plt
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#读取原始图像
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img = cv2.imread('lena2.png')
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#图像向上取样
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r1 = cv2.pyrUp(img)
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r2 = cv2.pyrUp(r1)
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r3 = cv2.pyrUp(r2)
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#显示图像
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cv2.imshow('original', img)
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cv2.imshow('PyrUp1', r1)
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cv2.imshow('PyrUp2', r2)
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cv2.imshow('PyrUp3', r3)
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cv2.waitKey()
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cv2.destroyAllWindows()

‎blog21-pyrDown/lena2.png‎

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‎blog21-pyrDown/people.png‎

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