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: NITHISHWAR S
# Register Number: 212221230071

# To Read,display the image

import cv2
color= cv2.imread('dp.jpg',-1)
cv2.imshow('dpworld',color)
cv2.waitKey(0)

# To write the image

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

# Find the shape of the Image
import cv2
color=cv2.imread('dp.jpg',1)
print(color.shape)

# To access rows and columns

import cv2
import random
img= cv2.imread('dp.jpg',-1)
for i in range(300):
    for j in range(img.shape[1]):
        img[i][j] = [random.randint(0,255),random.randint(0,0),random.randint(0,255)]
cv2.imshow('dpworld',img)
cv2.waitKey(0)

# To cut and paste portion of image

import cv2
img= cv2.imread('dp.jpg',-1)
tag = img[200:450,200:450]
img[150:400,150:400] = tag
cv2.imshow('dpworld',img)
cv2.waitKey(0)