Mahotas – 扩张图像
在本文中,我们将了解如何在 mahotas 中扩展图像。膨胀将像素添加到图像中对象的边界,而腐蚀则删除对象边界上的像素。从图像中的对象添加或删除的像素数量取决于用于处理图像的结构元素的大小和形状。
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
为了做到这一点,我们将使用 mahotas.morph.dilatemethod
Syntax : mahotas.morph.dilate(image)
Argument :It takes image object as argument
Return : It returns image object
注意:输入图像应被过滤或应加载为灰色
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
# loading image
luispedro = mahotas.demos.load('luispedro')
# filtering image
luispedro = luispedro.max(2)
# otsu method
T_otsu = mahotas.otsu(luispedro)
# image values should be greater than otsu value
img = luispedro > T_otsu
print("Image threshold using Otsu Method")
# showing image
imshow(img)
show()
# dilating image
dilate_img = mahotas.morph.dilate(img)
# showing dilated image
print("Dilated Image")
imshow(dilate_img)
show()
Python3
# importing required libraries
import mahotas
import numpy as np
import matplotlib.pyplot as plt
import os
# loading image
img = mahotas.imread('dog_image.png')
# setting filter to the image
img = img[:, :, 0]
# otsu method
T_otsu = mahotas.otsu(img)
# image values should be greater than otsu value
img = img > T_otsu
print("Image threshold using Otsu Method")
# showing image
imshow(img)
show()
# dilating image
dilate_img = mahotas.morph.dilate(img)
# showing dilated image
print("Dilated Image")
imshow(dilate_img)
show()
输出 :
Image threshold using Otsu Method
Dilated Image
另一个例子
Python3
# importing required libraries
import mahotas
import numpy as np
import matplotlib.pyplot as plt
import os
# loading image
img = mahotas.imread('dog_image.png')
# setting filter to the image
img = img[:, :, 0]
# otsu method
T_otsu = mahotas.otsu(img)
# image values should be greater than otsu value
img = img > T_otsu
print("Image threshold using Otsu Method")
# showing image
imshow(img)
show()
# dilating image
dilate_img = mahotas.morph.dilate(img)
# showing dilated image
print("Dilated Image")
imshow(dilate_img)
show()
输出 :
Image threshold using Otsu Method
Dilated Image