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: SRIJITH R

Register Number: 212221240054

i) #To Read,display the image
import cv2
a = cv2.imread('ninja.jpg',1)
cv2.imshow("SUPER BIKE",a)
cv2.waitKey(0)

ii) #To write the image
import cv2
colorImage = cv2.imread('ninja.jpg',1)
cv2.imwrite('written.jpg',colorImage)
writtenImage = cv2.imread('written.jpg',1)
cv2.imshow('WrittenImage',writtenImage)
cv2.waitKey(0)

iii) #Find the shape of the Image
import cv2 
colorImage = cv2.imread('ninja.jpg',1)
print(colorImage.shape)

iv) #To access rows and columns
import cv2
import random
colorImage = cv2.imread('ninja.jpg',1)
for i in range(100):
    for j in range(colorImage.shape[1]):
        colorImage[i][j]=[random.randint(0,255),random.randint(0,255),random.randint(0,255)]
cv2.imshow('to access rows and columns',colorImage)
cv2.waitKey(0)

v) #To cut and paste portion of image
import cv2
color_img = cv2.imread('ninja.jpg',1)
tag = color_img[200:400,300:500]
color_img[300:500,200:400] = tag
cv2.imshow('Cut And Paste',color_img)
cv2.waitKey(0)