Image Translation using OpenCV | Python

Last Updated : 04 Jan, 2023

Translation refers to the rectilinear shift of an object i.e. an image from one location to another. If we know the amount of shift in horizontal and the vertical direction, say (tx, ty) then we can make a transformation matrix e.g. $\begin{bmatrix} 1 & 0 & tx \\ 0 & 1 & ty \end{bmatrix}$ where tx denotes the shift along the x-axis and ty denotes shift along the y-axis i.e. the number of pixels by which we need to shift about in that direction. Now, we can use the cv2.wrapAffine() function to implement these translations. This function requires a 2×3 array. The numpy array should be of float type. Below is the Python code for Image Translation:

import cv2 
import numpy as np 
  
image = cv2.imread('C:\\gfg\\tomatoes.jpg') 
  
# Store height and width of the image 
height, width = image.shape[:2] 
  
quarter_height, quarter_width = height / 4, width / 4
  
T = np.float32([[1, 0, quarter_width], [0, 1, quarter_height]]) 
  
# We use warpAffine to transform 
# the image using the matrix, T 
img_translation = cv2.warpAffine(image, T, (width, height)) 
  
cv2.imshow("Originalimage", image) 
cv2.imshow('Translation', img_translation) 
cv2.waitKey() 
  
cv2.destroyAllWindows() 