在Python中调整巨大图像的大小(大于可用RAM)

from PIL import Image

image = Image.open('image.jpg')

width, height = image.size
new_width = 800  # 新的宽度
new_height = int(new_width * height / width)  # 根据宽高比计算新的高度

resized_image = image.resize((new_width, new_height))

resized_image.save('resized_image.jpg')

block_size = 1000  # 每个块的大小
blocks = []
for i in range(0, width, block_size):
    for j in range(0, height, block_size):
        box = (i, j, i+block_size, j+block_size)
        block = image.crop(box)
        blocks.append(block)

resized_blocks = []
for block in blocks:
    resized_block = block.resize((new_width, new_height))
    resized_blocks.append(resized_block)

resized_image = Image.new('RGB', (new_width, new_height))
x_offset = 0
y_offset = 0
for block in resized_blocks:
    resized_image.paste(block, (x_offset, y_offset))
    x_offset += block_size
    if x_offset >= new_width:
        x_offset = 0
        y_offset += block_size

resized_image.save('resized_image.jpg')