Mahotas – 将图像加载为灰色

在本文中，我们将看到如何在 mahotas 中将图像加载为灰色，在 mahotas 中有很多可用的图像，我们使用 mahotas.demos.load 方法来加载它们，在本教程中我们将使用“luispedro”图像，下面是加载它的命令。

mahotas.demos.load('luispedro')

下面是 luispedro 图像

为此，我们将使用 mahotas.demos.load 方法

Syntax : mahotas.demos.load(‘luispedro’, as_grey=True)
Argument : It takes image name as argument
Return : It returns numpy.ndarray i.e image object 
 

示例 1：

Python3

# importing required libraries
import mahotas
import mahotas.demos
import numpy as np
from pylab import imshow, gray, show
from os import path
 
# loading the image
photo = mahotas.demos.load('luispedro')
 
# showing original image
print("Original Image")
imshow(photo)
show()
 
# loading image as grey
photo = mahotas.demos.load('luispedro', as_grey = True)
 
# showing image
print("Image loaded as grey")
imshow(photo)
show()

输出 ：

示例 2：

Python3

# importing required libraries
import mahotas
import mahotas.demos
import numpy as np
from pylab import imshow, gray, show
from os import path
 
# loading the image
photo = mahotas.demos.load('luispedro')
 
# showing original image
print("Original Image")
imshow(photo)
show()
 
# loading image as grey
photo = mahotas.demos.load('luispedro', as_grey = True)
 
# converting image type to unit8
# because as_grey returns floating values
photo = photo.astype(np.uint8)
 
# calling gray method
gray()
 
# showing image
print("Image loaded as grey")
imshow(photo)
show()

输出 ：