borderImage.py

import cv2 as cv
import numpy as np
from matplotlib import pyplot as plt

img1 = cv.imread("imgs/opencv.png")

BLUE = [255,0,0]

replicate = cv.copyMakeBorder(img1,50,50,50,50,cv.BORDER_REPLICATE)
reflect = cv.copyMakeBorder(img1,50,50,50,50,cv.BORDER_REFLECT)
reflect101 = cv.copyMakeBorder(img1,50,50,50,50,cv.BORDER_REFLECT_101)
wrap = cv.copyMakeBorder(img1,50,50,50,50,cv.BORDER_WRAP)
constant= cv.copyMakeBorder(img1,50,50,50,50,cv.BORDER_CONSTANT,value=BLUE)


plt.subplot(231),plt.imshow(img1,'gray'),plt.title('ORIGINAL')
plt.subplot(232),plt.imshow(replicate,'gray'),plt.title('REPLICATE')
plt.subplot(233),plt.imshow(reflect,'gray'),plt.title('REFLECT')
plt.subplot(234),plt.imshow(reflect101,'gray'),plt.title('REFLECT_101')
plt.subplot(235),plt.imshow(wrap,'gray'),plt.title('WRAP')
plt.subplot(236),plt.imshow(constant,'gray'),plt.title('CONSTANT')
plt.show()