影像金字塔的生成python

生成影像金字塔可以使用OpenCV库中的pyrDown()或pyrUp()函数。下面是一个简单的示例代码：

import cv2

# 读取图像
img = cv2.imread('image.jpg')

# 生成高斯金字塔
gaussian_pyramid = [img]
for i in range(3):
    img = cv2.pyrDown(img)
    gaussian_pyramid.append(img)

# 生成拉普拉斯金字塔
laplacian_pyramid = [gaussian_pyramid[3]]
for i in range(3, 0, -1):
    gaussian_expanded = cv2.pyrUp(gaussian_pyramid[i])
    laplacian = cv2.subtract(gaussian_pyramid[i-1], gaussian_expanded)
    laplacian_pyramid.append(laplacian)

# 显示金字塔图像
cv2.imshow('Gaussian Pyramid', cv2.hconcat(gaussian_pyramid))
cv2.imshow('Laplacian Pyramid', cv2.hconcat(laplacian_pyramid))
cv2.waitKey(0)
cv2.destroyAllWindows()

注意：这里生成了一个4层的高斯金字塔和拉普拉斯金字塔，可以根据需要调整金字塔的层数。