在 Windows 7 上使用 Python 快速获取屏幕上某些像素的颜色

I need to get the color of some pixels on the screen or from the active window, and I need to do so quickly. I've tried using win32gui and ctypes/windll, but they're much too slow. Each of these programs gets the color of 100 pixels:

import win32gui
import time
time.clock()
for y in range(0, 100, 10):
    for x in range(0, 100, 10):
        color = win32gui.GetPixel(win32gui.GetDC(win32gui.GetActiveWindow()), x , y)
print(time.clock())

和

from ctypes import windll
import time
time.clock()
hdc = windll.user32.GetDC(0)
for y in range(0, 100, 10):
    for x in range(0, 100, 10):
        color = windll.gdi32.GetPixel(hdc, x, y)
print(time.clock())

每个都需要大约 1.75 秒.我需要这样的程序花费不到 0.1 秒.是什么让它这么慢?