import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = ['simHei']
plt.rcParams['axes.unicode_minus'] = False
from PIL import Image

# 读取 128x128 的图片
image_path = "homework_photo.png"  
image = Image.open(image_path)

# 使用三种插值方法放大到 512x512
image_nearest = image.resize((512, 512), Image.NEAREST)  # 最近邻插值
image_linear = image.resize((512, 512), Image.BILINEAR)  # 双线性插值
image_cubic = image.resize((512, 512), Image.BICUBIC)    # 立方插值

"""
# 保存为指定文件名
image.save("photo/原图.png")
image_nearest.save("photo/最近邻插值.png")
image_linear.save("photo/双线性插值.png")
image_cubic.save("photo/立方插值.png")
"""

plt.subplot(2,2,1)
plt.imshow(image)
plt.title('原图')
plt.axis('off')

plt.subplot(2,2,2)
plt.imshow(image_nearest)
plt.title('最近邻插值')
plt.axis('off')

plt.subplot(2,2,3)
plt.imshow(image_linear)
plt.title('双线性插值')
plt.axis('off')

plt.subplot(2,2,4)
plt.imshow(image_cubic)
plt.title('立方插值')
plt.axis('off')

plt.tight_layout()
plt.show()