Hướng dẫn how do you draw a point on an image in python? - làm thế nào để bạn vẽ một điểm trên một hình ảnh trong python?

import8

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

Ví dụ 3: Vẽ hai đường giao nhau giao nhau để làm X.

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

import8

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

Ví dụ 3: Vẽ hai đường giao nhau giao nhau để làm X.

matplotlib 7

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

import4

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

pyplot as plt1#!/usr/local/bin/python3 import cv2 import numpy as np # Make empty black image image=np.zeros((20,40,3),np.uint8) # Make one pixel red image[10,5]=[0,0,255] # Save cv2.imwrite("result.png",image) 1 import3pyplot as plt4#!/usr/local/bin/python3 import cv2 import numpy as np # Make empty black image image=np.zeros((20,40,3),np.uint8) # Make one pixel red image[10,5]=[0,0,255] # Save cv2.imwrite("result.png",image) 7pyplot as plt6import7

• ‘
• Đầu ra: & nbsp;
• Vẽ đường thẳng hoặc điểm trên hình ảnh
• Hiển thị cốt truyện/hình ảnh.

Hình ảnh được sử dụng:

Việc thực hiện bằng cách sử dụng phương pháp trên trên hình ảnh đã cho được cung cấp dưới đây:

Ví dụ 1: Vẽ một điểm trên hình ảnh.Drawing a point on the image.

Thuộc tính được sử dụng: đánh dấu marker

Nó được sử dụng để xác định loại điểm đánh dấu nên được hiển thị trong.

Python3

from matplotlib import image

from matplotlib import pyplot as plt

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

from6

from7

Output:

Ví dụ 2: Vẽ một dòng trên hình ảnhDraw a line on the image

Để vẽ một dòng, chúng tôi sẽ cung cấp các tọa độ của hai điểm trong hàm cốt truyện.

Thuộc tính được sử dụng: Độ rộng đường dây linewidth

Được sử dụng để chỉ định chiều rộng của dòng.

Python3

from matplotlib import image

from matplotlib import pyplot as plt

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

Ví dụ 2: Vẽ một dòng trên hình ảnh

Để vẽ một dòng, chúng tôi sẽ cung cấp các tọa độ của hai điểm trong hàm cốt truyện.

image5

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

from6

from7

Output: 

Thuộc tính được sử dụng: Độ rộng đường dâyDraw two intersecting lines crossing each other to make X.

Python3

from matplotlib import image

from matplotlib import pyplot as plt

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

Ví dụ 2: Vẽ một dòng trên hình ảnh

Để vẽ một dòng, chúng tôi sẽ cung cấp các tọa độ của hai điểm trong hàm cốt truyện.

Thuộc tính được sử dụng: Độ rộng đường dây

Được sử dụng để chỉ định chiều rộng của dòng.

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

from6

from7

import1

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)

#!/usr/local/bin/python3
import cv2
import numpy as np

# Make empty black image
image=np.zeros((20,40,3),np.uint8)

# Make one pixel red
image[10,5]=[0,0,255]

# Save
cv2.imwrite("result.png",image)