我需要向量化PixelAccess对象上的标量乘法因子，我目前正在嵌套的for循环中执行该操作。

当前尝试

original = Image.open('img.png')
TEMP = '/tmp/tmp.jpg'
original.save(TEMP, quality=90)
temporary = Image.open(TEMP)
diff = ImageChops.difference(original, temporary)
d = diff.load()
SCALE = 10

# Part to vectorize

WIDTH, HEIGHT = diff.size
for x in range(WIDTH):
    for y in range(HEIGHT):
        d[x, y] = tuple(k * SCALE for k in d[x, y])

问题是，PixelAccess对象的结构是由三个元素的元组组成的二维数组，这使得它很难适应NumPy框架。