Python中的魔杖 gaussian_blur()函数

另一种类型的模糊是高斯模糊。高斯模糊与法线的区别在于，高斯模糊是通过使用高斯函数来实现的。简单的任何形式的方程： 称为高斯函数。

Syntax :

wand.image.gaussian_blur(radius="radius_value", 
                           sigma="sigma_value", 
            channel = "optional_channel_value")
  
# radius should always be greater than sigma(standard deviation)

Parameters :

Parameter	Input Type	Description
radius	numbers.real	the radius of the, in pixels, not counting the center pixel.
sigma	numbers.real	the standard deviation, in pixels
channel	basestring	Optional color channel to apply blur.

Image Used :

Example #1:

# import display() to show final image
from wand.display import display
  
# import Image from wand.image module
from wand.image import Image
  
# read file using Image function
with Image(filename ="koala.jpeg") as img:
  
    # perform adaptive blur effect using adaptive_blur() function
    img.gaussian_blur(radius = 5, sigma = 4)
  
    # save final image
    img.save(filename ="gb_koala.jpeg")
  
    # display final image
    display(img)

Output :

 

Example #2: Reduced radius and sigma

# import display() to show final image
from wand.display import display
  
# import Image from wand.image module
from wand.image import Image
  
# read file using Image function
with Image(filename ="koala.jpeg") as img:
  
    # perform adaptive blur effect using adaptive_blur() function
    img.gaussian_blur(radius = 2, sigma = 3)
  
    # save final image
    img.save(filename ="gb_koala.jpeg")
  
    # display final image
    display(img)

Output :

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