Python放大图像(无外部库帮助)

import numpy as np
import cv2

def resize_image(image, scale):
    height, width = image.shape[:2]
    new_height = int(height * scale)
    new_width = int(width * scale)
    new_image = np.zeros((new_height, new_width, 3), dtype=np.uint8)

    for i in range(new_height):
        for j in range(new_width):
            x = int(i / scale)
            y = int(j / scale)
            new_image[i, j] = image[x, y]

    return new_image

# 读取图像
image = cv2.imread('image.jpg')

# 放大图像
scale = 2.0
new_image = resize_image(image, scale)

# 显示放大后的图像
cv2.imshow('Resized Image', new_image)
cv2.waitKey(0)
cv2.destroyAllWindows()