opencv学习笔记python实现 图像金字塔（高斯金字塔与拉普拉斯金字塔）

#-*-coding:utf-8 -*-
import cv2 as cv

#高斯金字塔
def pyramid_image(image):
    cv.imshow("yuan",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("pyramid"+str(i), dst)
        temp = dst.copy()
    return pyramid_images

#拉普拉斯金字塔
def lpls_image(image):
    pyramid_images = pyramid_image(image)
    level = len(pyramid_images)
    for i in range(level-1, -1, -1):#数组下标从0开始 i从金字塔层数-1开始减减
        if (i-1)<0:#原图
            expand = cv.pyrUp(pyramid_images[i])
            lpls = cv.subtract(image, expand)
            cv.imshow("lpls_%s" % i, lpls)
        else:
            expand = cv.pyrUp(pyramid_images[i])
            lpls = cv.subtract(pyramid_images[i-1], expand)
            cv.imshow("lpls_%s" % i, lpls)


img = cv.imread("d://work//1.jpg")
lpls_image(img)
cv.waitKey(0)
cv.destroyAllWindows()