Computer Vision Course: image pyramids (Gaussian pyramid and Laplacian pyramid)  



import cv2

import numpy as np

img = cv2.imread("lena.jpg")

layer = img.copy()

gaussian_pyramid_list = [layer]


for i in range(6):

    layer = cv2.pyrDown(layer)     

    gaussian_pyramid_list.append(layer)     

    #cv2.imshow(str(i), layer)     


layer = gaussian_pyramid_list[5]

cv2.imshow('upper level Gaussian Pyramid', layer)

laplacian_pyramid_list = [layer]


for i in range(5, 0, -1):

    gaussian_extended = cv2.pyrUp(gaussian_pyramid_list[i])     

    laplacian = cv2.subtract(gaussian_pyramid_list[i-1], gaussian_extended)     

    cv2.imshow(str(i), laplacian)     


cv2.imshow("Original image", img)

cv2.waitKey(0)

cv2.destroyAllWindows()#close window

============================

data used in this video


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