图像分析之图像金字塔

# - 高斯金字塔
import cv2  # opencv读取的格式是BGR
import numpy as np
import matplotlib.pyplot as plt # Matplotlib是RGB

img=cv2.imread("cat.jpg")
cv2.imshow('img', img)
print(img.shape)

# 放大两倍
up=cv2.pyrUp(img)
cv2.imshow('img2', up)
print (up.shape)

# 缩小两倍
down=cv2.pyrDown(img)
cv2.imshow('img3', down)
print (down.shape)

cv2.waitKey()
cv2.destroyAllWindows()

# 拉普拉斯金字塔 
import cv2  # opencv读取的格式是BGR
import numpy as np
import matplotlib.pyplot as plt # Matplotlib是RGB

img=cv2.imread("cat.jpg")
cv2.imshow('img', img)
print(img.shape)
down=cv2.pyrDown(img)
down_up=cv2.pyrUp(down)
l_1=img-down_up
cv2.imshow('l_1', l_1)

cv2.waitKey()
cv2.destroyAllWindows()