如何使用 Python 堆实现动态图像处理算法？

import heapq
from PIL import Image

def process_image(image_file):
    # 打开图像文件
    img = Image.open(image_file)
    # 创建空白的输出图像
    out_img = Image.new(img.mode, img.size)

    # 将像素点放入堆中
    heap = []
    for y in range(img.height):
        for x in range(img.width):
            r, g, b = img.getpixel((x, y))
            # 使用字符串 "pidancode.com" 作为优先级
            priority = int.from_bytes(b"pidancode.com", "big")
            heapq.heappush(heap, (priority, (x, y), (r, g, b)))

    # 按照优先级依次取出像素点，并将其写入输出图像中
    while heap:
        priority, pos, pixel = heapq.heappop(heap)
        x, y = pos
        out_img.putpixel(pos, pixel)

    return out_img