EX.NO : 02

Image-Acquisition-from-Web-Camera

Aim

To write a python program using OpenCV to capture the image from the web camera and do the following image manipulations. i) Write the frame as JPG ii) Display the video iii) Display the video by resizing the window iv) Rotate and display the video

Software Used

Anaconda - Python 3.7

Algorithm

Step 1:

Import cv2 and capture the video using cv2.VideoCapture(0)

Step 2:

Write the captured image using cv2.imwrite("JayashreeRao.jpg",frame)

Step 3:

Resize the image using cv2.resize(frame, (0,0), fx = 0.5, fy=0.5)

Step 4:

display the image until the loop gets over

Step 5:

Rotate the image using cv2.rotate(smaller_frame,cv2.cv2.ROTATE_180)

Program:

### Developed By: DURGADEVI P
### Register No: 212220230011

## i) Write the frame as JPG file
import cv2
videocaptureobject = cv2.VideoCapture(0)
while(True):
    ret,frame = videocaptureobject.read()
    cv2.imwrite("Pic1.jpg",frame)
    result = False 
videocaptureobject.release()
cv2.destroyAllWindows()

## ii) Display the video
import cv2
import numpy as np
cap = cv2.VideoCapture(0)
while True:
    ret, frame = cap.read()
    cv2.imshow('frame', frame)
    if cv2.waitKey(1) == ord('q'):
        break
cap.release()
cv2.destroyAllwindows()

## iii) Display the video by resizing the window
import cv2
import numpy as np
cap = cv2.VideoCapture(0)

while True:
    ret, frame = cap.read()
    width = int(cap.get(3))
    height = int(cap.get(4))
    image = np.zeros(frame.shape, np.uint8)
    smaller_frame = cv2.resize(frame, (0,0), fx=0.5, fy=0.5)
    image[:height//2, :width//2] = smaller_frame
    image[:height//2, width//2:] = smaller_frame
    image[height//2:, :width//2] = smaller_frame
    image[height//2:, width//2:] = smaller_frame
    cv2.imshow('frame', image)
    if cv2.waitKey(1) == ord('q'):
        break
cap.release()
cv2.destroyAllWindows(

## iv) Rotate and display the video
import cv2
import numpy as np
cap = cv2.VideoCapture(0)
while True:
    ret, frame = cap.read()
    width = int(cap.get(3))
    height = int(cap.get(4))
    
    image = np.zeros(frame.shape, np.uint8)
    smaller_frame = cv2.resize(frame, (0,0), fx=0.5, fy=0.5)
    image[:height//2, :width//2] = cv2.rotate(smaller_frame,cv2.cv2.ROTATE_180)
    image[:height//2, width//2:] = smaller_frame
    image[height//2:, :width//2] = cv2.rotate(smaller_frame,cv2.cv2.ROTATE_180)
    image[height//2:, width//2:] = smaller_frame
    
    cv2.imshow('frame', image)
    if cv2.waitKey(1) == ord('q'):
        break
cap.release()
cv2.destroyAllwindows()

durga46 / image-acquisition-from-web-camera Goto Github PK