Python Wand – An Overview

The Wand is an Imagick library for python. It supports the functionalities of Imagick API in Python 2.6, 2.7, 3.3+, and PyPy.This library not only helps in processing the images but also provides valuable functionalities for Machine Learning codes using NumPy.

Installation:
By Pip:

$ pip install Wand

As the wand is an Imagick API, so we require Imagick dependencies.

Imagick’s Installation:

• For Ubuntu/Debian:

  $ sudo apt-get install libmagickwand-dev

• For Mac (By Brew Installer)

  $ brew install imagemagick

  Installation of MacPorts

  $ sudo port install imagemagick

  Note: If Python is not installed using MacPorts, we need to export MAGICK_HOME.

  $ export MAGICK_HOME=/opt/local

Example 1: Reading an Image:
Input Image: geeksforgeeks.png

# Import library from the wand
from wand.image import Image

# Import the image
with Image(filename ='geeksforgeeks.png') as pic:

    # Read the image to fetch actual dimensions
    print('Width of the image:', pic.width)
    print('Height of the image:', pic.height)
Output:
('Width of the image:', 667L)
('Height of the image:', 184L)
Example 2: Blur an Image:
# Import library from the wand
from wand.image import Image

# Import the image
with Image(filename ="geeksforgeeks.png") as pic:

    # Invoke blur function with radius 0 and sigma 3
    pic.blur(radius = 0, sigma = 3)

    # save the processed iamge
    pic.save(filename ="blur1.png")
Output:

Example 3: Transfor the image
# Import library from the wand
from wand.image import Image

# Import the image
with Image(filename ='geeksforgeeks.png') as image:
    # Clone the image in order to process
    with image.clone() as flip:

        # Invoke flip function
        flip.flip()

        # Save the image
        flip.save(filename ='flip-geeksforgeeks.jpg')
Output:

Example 4: Drawing:
# Import libraries from the wand
from wand.image import Image
from wand.drawing import Drawing
from wand.color import Color

with Drawing() as draw:
    # Set Stroke color the circle to black
    draw.stroke_color = Color('black')

    # Set Width of the circlw to 2
    draw.stroke_width = 2

    # Set the fill color to 'White (# FFFFFF)'
    draw.fill_color = Color('white')

    # Invoke Circle function with center
    # at 200, 200 and radius 100
    draw.circle((200, 200), # Center point
                (100, 100)) # Perimeter point
    with Image(width = 400, height = 400,
              background = Color('lightgreen')) as pic:
        draw(pic)
        pic.save(filename ='circle1.jpg')
Output:

References:
• http://docs.wand-py.org/en/0.5.9/index.html