Mahotas – 创建 RGB 图像

在本文中，我们将了解如何在 mahotas 中创建 RGB 图像。 RGB 图像（有时称为真彩色图像）作为 m×n×3 数据数组存储在 MATLAB 中，该数组定义了每个像素的红色、绿色和蓝色分量。 RGB 图像可以在每个通道的数组的帮助下创建。

In order to do this we will use as_rgb method

Syntax : mahotas.as_rgb(r, g, b)

Argument : It takes three numpy array as argument

Return : It returns RGB ndarray object

编程需要懂一点英语

下面是实现

# importing required libraries
import mahotas
import mahotas.demos
from pylab import gray, imshow, show
import numpy as np
  
# creating array of shape 50x50
# for red channel
r = np.arange(2500).reshape(50, 50)
  
# for blue channel
g = np.arange(2500).reshape(50, 50)
  
# for blue channel
b = np.arange(2500).reshape(50, 50)
  
# making red channel values to 0
r = r * 0
  
# increasing green channel values
g = g * 100
  
# making blue channel values to 0
b = b * 0
  
# creating rgb image from these three channel
img = mahotas.as_rgb(r, g, b)
  
# showing image
imshow(img)
show()

输出：

另一个例子

# importing required libraries
import mahotas
import mahotas.demos
from pylab import gray, imshow, show
import numpy as np
  
# creating numpy linspace
z1 = np.linspace(0, np.pi)
  
# creating numpy meshgrid
X, Y = np.meshgrid(z1, z1)
  
# creating rgb channels
# creating red channel through sin function
red = np.sin(X)
  
# creating green channel through cos function
green = np.cos(4 * Y)
  
# creating blue channel
blue = X * Y
  
# creating rgb image from these three channel
img = mahotas.as_rgb(red, green, blue)
  
# showing image
imshow(img)
show()

输出：