Mahotas – 图像的区域最大值
在本文中,我们将了解如何在 mahotas 中获得图像的区域最大值。区域最大值是比局部最大值更严格的标准,因为它考虑了整个对象而不仅仅是邻域。最大值是具有恒定强度值的像素的连接分量,被具有较低值的像素包围。
在本教程中,我们将使用“Lena”图像,下面是加载它的命令。
mahotas.demos.load('lena')
下面是莉娜的图片
In order to do this we will use mahotas.regmax method
Syntax : mahotas.regmax(img)
Argument : It takes image object as argument
Return : It returns image object
注意:输入图像应被过滤或加载为灰色
为了过滤图像,我们将获取图像对象 numpy.ndarray 并在索引的帮助下对其进行过滤,下面是执行此操作的命令
image = image[:, :, 0]
下面是实现
Python3
# importing required libraries
import mahotas
import mahotas.demos
from pylab import gray, imshow, show
import numpy as np
import matplotlib.pyplot as plt
# loading image
img = mahotas.demos.load('lena')
# filtering image
img = img.max(2)
print("Image")
# showing image
imshow(img)
show()
# finding regional maxima
new_img = mahotas.regmax(img)
# showing image
print("Regional Maxima")
imshow(new_img)
show()
Python3
# importing required libraries
import mahotas
import numpy as np
from pylab import gray, imshow, show
import os
import matplotlib.pyplot as plt
# loading image
img = mahotas.imread('dog_image.png')
# filtering image
img = img[:, :, 0]
print("Image")
# showing image
imshow(img)
show()
# finding regional maxima
new_img = mahotas.regmax(img)
# showing image
print("Regional Maxima")
imshow(new_img)
show()
输出 :
Image
Regional Maxima
另一个例子
Python3
# importing required libraries
import mahotas
import numpy as np
from pylab import gray, imshow, show
import os
import matplotlib.pyplot as plt
# loading image
img = mahotas.imread('dog_image.png')
# filtering image
img = img[:, :, 0]
print("Image")
# showing image
imshow(img)
show()
# finding regional maxima
new_img = mahotas.regmax(img)
# showing image
print("Regional Maxima")
imshow(new_img)
show()
输出 :
Image
Regional Maxima