Demonstation of OpenCV image transformation techniques (Scaling and Rotation)

opencv_img_transformation.py

import numpy as np
import cv2

img = cv2.imread("image.jpg")

# Scale
img_half = cv2.resize(img,(0,0),fx=0.5,fy=0.5)
img_stretch = cv2.resize(img,(600,600))
img_stretch_near = cv2.resize(img,(600,600),interpolation=cv2.INTER_NEAREST)

cv2.inshow(img_half)
cv2.inshow(img_stretch)
cv2.inshow(img_stretch_near)

# Rotation
M = cv2.getRotationMatrix2D((0,0),-30,1) # Origin, Degrees and 1
rotated = cv2.warpAffine(img,M,(img.shape[1],img.shape[0]))
cv2.imshow("Rotated",rotated)

cv2.waitKey(0)
cv2.destroyAllWindows()