python 高斯金字塔_python实现opencv学习十五：高斯金字塔和拉普拉斯金字塔

要求：拉普拉斯金字塔时，图像大小必须是2的n次方*2的n次方，不然会报错

代码如下：

# -*- coding=GBK -*-

import cv2 as cv

#高斯金字塔

def pyramid_image(image):

level = 3#金字塔的层数

temp = image.copy()#拷贝图像

pyramid_images = []

for i in range(level):

dst = cv.pyrDown(temp)

pyramid_images.append(dst)

cv.imshow("高斯金字塔"+str(i), dst)

temp = dst.copy()

return pyramid_images

#拉普拉斯金字塔

def laplian_image(image):

pyramid_images = pyramid_image(image)

level = len(pyramid_images)

for i in range(level-1, -1, -1):

if(i-1) < 0 :

expand = cv.pyrUp(pyramid_images[i], dstsize=image.shape[:2])

lpls = cv.subtract(image, expand)

cv.imshow("拉普拉斯"+str(i), lpls)

else:

expand = cv.pyrUp(pyramid_images[i], dstsize=pyramid_images[i-1].shape[:2])

lpls = cv.subtract(pyramid_images[i-1], expand)

cv.imshow("拉普拉斯"+str(i), lpls)

src = cv.imread("C://01.jpg")

cv.imshow("原来", src)

laplian_image(src)

cv.waitKey(0)

cv.destroyAllWindows()