Python – Wand 中的 Image()函数

在这篇具体的文章中，我们将学习如何通过Python wand 模块读取我们的图像。要在 Wand 中读取图像，我们使用 Image()函数。首先要操作图像，我们需要在Python中读取图像。

Parameters :

Parameter	Input Type	Description
image	Image	make exact copy of image
blob	bytes	opens an image of blob byte array
file	object	opens an image of the file object
filename	basestring	opens image from filename
width	numbers.Integral	the width of anew blank image or an image loaded from raw data
height	numbers.Integral	the height of a new blank image or an image loaded from raw data
depth	numbers.Integral	the depth used when loading raw data.
background	wand.color.Color	an optional background color.
colorspace	basestring	sets the stack’s default colorspace value before reading any images.
units	basestring	paired with resolution for defining an image’s pixel density.

现在我们将编写一个代码来打印图像的高度和宽度。
代码 ：

# import required libraries
from __future__ import print_function
from wand.image import Image
  
    # read image using Image() function
    img = Image(filename ='koala.jpg')
  
    # print height of image
    print('height =', img.height)
  
    # print width of image
    print('width = ', img.width)

输出 ：

height = 300
width = 400

我们还可以使用 urllib2 通用Python库中的urlopen函数从 url 读取图像。让我们看看打印从 url 读取的图像高度和宽度的代码。

# import required libraries
from __future__ import print_function
from urllib2 import urlopen
from wand.image import Image
  
response = urlopen('https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-6.png')
try:
         
        # read image using Image() function
        img = Image(file = response)
  
        # print height of image
        print('Height =', img.height)
  
        # print width of image
        print('Width =', img.width)
finally:
    response.close()