Wand noise() function – Python
Last Updated :
04 Oct, 2021
The noise() function is an inbuilt function in the Python Wand ImageMagick library which is used to add noise to the image.
Syntax:
noise(noise_type, attenuate, channel)
Parameters: This function accepts three parameters as mentioned above and defined below:
- noise_type: This parameter is used to store the noise type. Some of the available noise types are ‘undefined’, ‘uniform’, ‘gaussian’, ‘multiplicative_gaussian’, ‘impulse’, ‘laplacian’, ‘poisson’, ‘random’.
- attenuate: This parameter stores the rate of distribution.
- channel: This parameter stores the channel type as “green”, “yellow”, “red” etc.
Return Value: This function returns the Wand ImageMagick object.
Original Image:
Example 1:
Python3
from wand.image import Image
with Image(filename = '../geeksforgeeks.png' ) as image:
with image.clone() as noise:
noise.noise( "poisson" , 2 , "green" )
noise.save(filename = 'noise1.jpg' )
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Output:
Example 2:
Python3
from wand.image import Image
from wand.drawing import Drawing
from wand.color import Color
with Drawing() as draw:
draw.stroke_color = Color( 'black' )
draw.stroke_width = 1
draw.fill_color = Color( 'white' )
draw.circle(( 200 , 200 ),
( 100 , 100 ))
draw.font = '../Helvetica.ttf'
draw.font_size = 30
with Image(width = 400 , height = 400 , background = Color( '# 45ff33' )) as pic:
draw.text( int (pic.width / 3 ), int (pic.height / 2 ), 'GeeksForGeeks !' )
draw(pic)
pic.noise( "impulse" , 3 , "yellow" )
pic.save(filename = 'noise2.jpg' )
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Output:
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