Mahotas – 将模板与图像精确匹配
在本文中,我们将了解如何将模板与 mahotas 中的图像进行匹配。通过匹配模板,我们可以借助我们想要查找的结构找到图像中的特定位置或事物。
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.find method
Syntax : mahotas.find(img, template)
Argument : It takes image object and template as argument
Return : It returns boolean ndarray
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
img = mahotas.demos.load('lena')
# filtering image
img = img.max(2)
# 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()
# template
template = np.array([
[0, 1, 1],
[0, 1, 1],
[0, 1, 1]], bool)
# finding template in the image
new_img = mahotas.find(img, template)
print("Image with only templates")
# showing new image
imshow(new_img)
show()
Python3
# importing required libraries
import mahotas
import numpy as np
from pylab import gray, imshow, show
import os
# loading image
img = mahotas.imread('dog_image.png')
# filtering 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()
# template
template = np.array([
[0, 1, 1],
[0, 1, 1],
[0, 1, 1]], bool)
# finding template in the image
new_img = mahotas.find(img, template)
print("Image with only templates")
# showing new image
imshow(new_img)
show()
输出 :
Image threshold using Otsu Method
Image with only templates
另一个例子
Python3
# importing required libraries
import mahotas
import numpy as np
from pylab import gray, imshow, show
import os
# loading image
img = mahotas.imread('dog_image.png')
# filtering 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()
# template
template = np.array([
[0, 1, 1],
[0, 1, 1],
[0, 1, 1]], bool)
# finding template in the image
new_img = mahotas.find(img, template)
print("Image with only templates")
# showing new image
imshow(new_img)
show()
输出 :
Image threshold using Otsu Method
Image with only templates