魔杖 blue_shift()函数– Python
blue_shift()函数是Python Wand ImageMagick 库中的一个内置函数,用于使图像的颜色变暗。
Syntax:
Parameters: This function accepts single parameter as mentioned above and defined below:
- factor: This parameter is used to specify the value of factor in order to apply dullness.
Return Value: This function returns the Wand ImageMagick object.
原图:
示例 1:
Python3
blue_shift(factor)
Python3
# 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 blue_shift:
# Invoke blue_shift function with radius as 10, sigma as 12
# channel as 'Green'
blue_shift.blue_shift(factor = 1.8)
# Save the image
blue_shift.save(filename ='blue_shift1.jpg')
输出:
示例 2:
Python3
# 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 circle 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 blue_shift function with factor 2
pic.blue_shift(factor = 2)
# Save the image
pic.save(filename ='blue_shift2.jpg')
输出: