在python中有黑色像素的图像周围绘制方框

from PIL import Image, ImageDraw

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

width, height = image.size

new_image = Image.new("RGB", (width, height), "white")
new_image.paste(image, (0, 0))

draw = ImageDraw.Draw(new_image)

for x in range(width):
    for y in range(height):
        pixel = image.getpixel((x, y))
        if pixel == (0, 0, 0):  # 检查像素是否为黑色
            draw.rectangle([(x-1, y-1), (x+1, y+1)], outline="red")

new_image.save("output.jpg")