Write given 2-D data in image file

 import numpy as np 

 import cv2 

 data=np.array([[255,0,255,0],[0,255,0,255],[255,0,255,0],[0,255,0,255]], dtype=np.uint8)

 cv2.imwrite('output_image.png',data) 

 cv2.imshow('image',data) 

 cv2.waitKey(0) 

 cv2.destroyAllWindows()

Create color image using R, G and B three separate planes. Program:

 import cv2 img = cv2.imread("C:/Users/welcome/Desktop/sem6/DIP/Lenna.png") cv2.imshow("Original_image", img) b,g,r=cv2.split(img) merge_bgr=cv2.merge((b,g,r)) cv2.imshow("Merge_image", merge_bgr) cv2.waitKey(0) cv2.destroyAllWindows()

Write given 2D image file program

 

Create color image using R, G and B three separate planes

 import cv2

import numpy as np

height, width = 300, 300

R = np.full((height, width), 255, dtype=np.uint8) # Red plane (fully red)

G = np.zeros((height, width), dtype=np.uint8) # Green plane (zero)

B = np.full((height, width), 100, dtype=np.uint8) # Blue plane (some blue)

color_image = cv2.merge([B, G, R])

cv2.imshow("Color Image from R, G, B Planes", color_image)

cv2.waitKey(0)

cv2.destroyAllWindows()

Draw image profile

 import cv2

import numpy as np

import matplotlib.pyplot as plt

image = cv2.imread('your_image.jpg', cv2.IMREAD_GRAYSCALE)

row = image.shape[0] // 2 # Middle row

profile = image[row, :] # Intensity values along that row

image_with_line = cv2.cvtColor(image, cv2.COLOR_GRAY2BGR)

cv2.line(image_with_line, (0, row), (image.shape[1], row), (0, 0, 255), 1)

cv2.imshow("Image with Profile Line", image_with_line)

plt.figure(figsize=(10, 4))

plt.title(f'Intensity Profile of Row {row}')

plt.plot(profile, color='black')

plt.xlabel('Column Index')

plt.ylabel('Intensity')

plt.grid(True)

plt.tight_layout()

plt.show()

cv2.waitKey(0)

cv2.destroyAllWindows()

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How to install OPENCV package of python in Ubuntu

 First be sure that gedit is already installed in your system. 

If it is not installed, run this command 

                                sudo apt  install gedit  # version 46.1-3

Next run : 

                                sudo apt update

Now, run these following commands to install opencv in your ubuntu operating system.

sudo apt install libopencv-dev python3-opencv

Check opencv version:

                                python3 -c "import cv2; print(cv2.__version__)"

After installing, you can check wheather your program is properly running or not, you can simply write a sample code like....

To create python file : gedit p1.py

import cv2 img = cv2.imread("/home/arik/Downloads/image.jpeg", cv2.IMREAD_GRAYSCALE) cv2.imshow('image',img) cv2.waitKey(0) cv2.destroyAllWindows()

Here is the above given image:  

To run : python3 p1.py

If output is,

So, your installation is successfull.