python selenium screenshot captcha image

Question

我想拍摄截图并仅裁剪验证码图片，即时编写此代码：enter image description here：

elem = driver.find_element_by_css_selector("#imagecpt")
loc  = elem.location
size = elem.size
left  = loc['x']
top   = loc['y']
width = size['width']
height = size['height']
box = (int(left), int(top), int(left+width), int(top+height))
screenshot = driver.get_screenshot_as_png()
img = Image.open(StringIO.StringIO(screenshot))
area = img.crop(box)
area.save('screenshot.png', 'PNG')

保存的图片是完整的黑色，我错了吗？

Answer 1

我假设您正在使用PIL库中的Image模块。

尝试获取base64值，对其进行解码，然后将其作为参数传递给open()方法。

...
screenshot = driver.get_screenshot_as_base64()
img = Image.open(StringIO.StringIO(base64.b64decode(screenshot))
...

Answer 2

呀。对于Python3，它将像：

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