Wand – Python中的 sketch()函数

Sketch是Python中 Wand 库中的另一种艺术特效。 sketch()函数在输出中生成铅笔素描图像。为获得最佳效果，半径值应大于 sigma。

Syntax :

Python3

# 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:
 
    # transform to grayscale image
    img.transform_colorspace("gray")
 
    # perform adaptive blur effect using adaptive_blur() function
    img.sketch(0.5, 0.0, 98.0)
 
    # save final image
    img.save(filename ="rb_koala.jpeg")
 
    # display final image
    display(img)

Parameter : 
 

Parameter	Input Type	Description
radius	numbers.Real	Size of Gaussian aperture.
sigma	numbers.Real	standard deviation of the Gaussian operator.
angle	numbers.Real	direction of blur.

 

源图像：

示例 #1：

Python3

wand.image.sketch( radius, sigma, angle)
# radius should always be greater than sigma(standard deviation)

输出 ：

示例#2：为了获得最佳结果，将图像转换为灰度图像

Python3

# 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.sketch(0.5, 0.0, 98.0)
 
    # save final image
    img.save(filename ="rb_koala.jpeg")
 
    # display final image
    display(img)

输出 ：