READ AND WRITE AN IMAGE

AIM

To write a python program using OpenCV to do the following image manipulations. i) Read, display, and write an image. ii) Access the rows and columns in an image. iii) Cut and paste a small portion of the image.

Software Required:

Anaconda - Python 3.7

Algorithm:

Step1:

Choose an image and save it as a filename.jpg

Step2:

Use imread(filename, flags) to read the file.

Step3:

Use imshow(window_name, image) to display the image.

Step4:

Use imwrite(filename, image) to write the image.

Step5:

End the program and close the output image windows.

Program:

Developed By: Kiran J

Register Number: 212221240022

i) #To Read,display the image

import cv2
color_image = cv2.imread('212221240022.jpg',1)
#color_image = c2.imread('C:\Users\DELL\Desktop\212221240022.jpg',1)
grey_image = cv2.imread('212221240022.jpg',0)
cv2.imshow('kiran',color_image)
cv2.imshow('kiran212221240022',grey_image)
cv2.waitKey(0)
cv2.destroyAllWindows()

ii) #To write the image

import cv2
color= cv2.imread('212221240022.jpg',-1)
cv2.imwrite('212221240022.jpg',color)

iii) #Find the shape of the Image

import cv2
color=cv2.imread('212221240022.jpg',1)
print(color.shape)

iv) #To access rows and columns

import cv2
import random
img= cv2.imread('212221240022.jpg',-1)
for i in range(150):
    for j in range(img.shape[1]):
        img[i][j] = [random.randint(0,255),random.randint(0,255),random.randint(0,255)]
cv2.imshow('212221240022.jpg',img)
cv2.waitKey(0)

v) #To cut and paste portion of image

import cv2
img= cv2.imread('212221240022.jpg',-1)
new = img[200:450,200:450]
img[150:400,150:400] = new
cv2.imshow('kiran212221240022',img)
cv2.waitKey(0)

Output:

i) Read and display the image

ii)Write the image

iii)Shape of the Image

iv)Access rows and columns

v)Cut and paste portion of image

Result:

Thus the images are read, displayed, and written successfully using the python program.