blur()函数是Python Wand ImageMagick库中的内置函数，用于模糊图像。
用法：
blur(radius, sigma, channel)
参数：该函数接受上面提到的和下面定义的三个参数：
- radius:此参数用于指定半径值，即高斯孔径的大小。
- sigma:此参数用于指定sigma的值，它是高斯滤波器的标准偏差。
- channel:此参数用于将图像通道的值指定为未定义的‘red’, ‘gray’，‘cyan’, ‘green’，‘magenta’, ‘blue’，‘yellow’, ‘alpha’，‘opacity’, ‘black’，‘index’, ‘composite_channels’，‘all_channels’, ‘sync_channels’，‘default_channels’。
返回值：此函数返回Wand ImageMagick对象。
原始图片：
范例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 blur:
# Invoke blur function with radius as 10, sigma as 12
# channel as 'Green'
blur.blur(int(10), int(12), 'Green')
# Save the image
blur.save(filename ='blur1.jpg')输出：
范例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 blur function with radius as 200, sigma as 5
# Channel as red
pic.blur(int(200), int(5), 'Green')
# Save the image
pic.save(filename ='blur2.jpg')输出：
相关用法
注：本文由纯净天空筛选整理自sarthak_ishu11大神的英文原创作品 Wand blur() function – Python。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。