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Wand wave() function – Python

  • Last Updated : 10 May, 2020

The wave() function is an inbuilt function in the Python Wand ImageMagick library which is used to alter an image along with a sine wave. It creates a ripple effect.

Syntax:

wave(amplitude, wave_length, method)

Parameters: This function accepts three parameters as mentioned above and defined below:

  • Amplitude: This parameter stores the value of the amplitude of the sine wave.
  • Wave_length: This parameter stores the value of the wavelength of the sine wave.
  • method: This parameter is used to specify the value of method which takes pixel interpolation method as ‘undefined’, ‘average’, ‘average9’, ‘average16’, ‘background’, ‘bilinear’, ‘blend’, ‘catrom’, ‘integer’, ‘mesh’, ‘nearest’, ‘spline’

Return Value: This function returns the Wand ImageMagick object.

Original Image:



Example 1:




# Import library from Image 
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 wave:
        # Invoke wave function with amplitude as 12, wavelength as 15
        # method as 'bilinear'
        wave.wave(12, 15, 'bilinear')
        # Save the image
        wave.save(filename ='wave1.jpg')

Output:

Example 2:




# 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 = 1
    # Set the fill color to 'White (# FFFFFF)'
    draw.fill_color = Color('white')
  
    # Invoke Circle function with center at 50, 50 and radius 25
    draw.circle((200, 200), # Center point
                (100, 100)) # Perimeter point
    # Set the font style
    draw.font = '../Helvetica.ttf'
    # Set the font size 
    draw.font_size = 30
      
    with Image(width = 400, height = 400, background = Color('# 45ff33')) as pic:
        # Set the text and its location
        draw.text(int(pic.width / 3), int(pic.height / 2), 'GeeksForGeeks !')
        # Draw the picture
        draw(pic)
        # Invoke wave() function with amplitude as 10, wavelength as 10
        # method as 'blend'
        pic.wave(10, 10, 'blend')
        # Save the image 
        pic.save(filename ='wave2.jpg')

Output:

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