read-and-write-image's Introduction

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 : JAYASRI DODDA

Register Number : 212222240028

i) #To Read,display the image

import cv2
color_img=cv2.imread('ex3.jpg',1)
cv2.imshow('212222240028_JAYASRI',color_img)
cv2.waitKey(0)

ii) #To write the image

import cv2
color_img=cv2.imread('ex3.jpg',1)
w=cv2.imwrite('1.png',color_img)
cv2.imshow('212222240028_JAYASRI',color_img)
cv2.waitKey(0)

iii) #Find the shape of the Image

import cv2
import random
color_img=cv2.imread('ex3.jpg',1)
print(color_img.shape)

iv) #To access rows and columns

import cv2
import random
color_img=cv2.imread('exx.jpg',1)
for i in range(100):
    for j in range(color_img.shape[1]):
        color_img[i][j]=[random.randint(0,255),random.randint(0,255),random.randint(0,255)]
cv2.imshow('212222240028_JAYASRI',color_img)
cv2.waitKey(0)

v) #To cut and paste portion of image

import cv2
color_image=cv2.imread('exx.jpg',-1)
tag=color_image[300:400,300:400]
color_image[50:150,50:150]=tag
cv2.imshow('212222240028_JAYASRI',color_image)
cv2.waitKey(0)