Python OpenCV —— Border

# -*- coding: utf-8 -*-
"""
Created on Wed Sep 28 00:58:51 2016

@author: Administrator
"""

# making borders for image
# cv2.copyMakeBorder()

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

BLUE = [255,0,0]
img1 = cv2.imread(‘opencv_logo.png‘)

replicate = cv2.copyMakeBorder(img1,10,10,10,10,cv2.BORDER_REPLICATE)
reflect = cv2.copyMakeBorder(img1,10,10,10,10,cv2.BORDER_REFLECT)
reflect101 = cv2.copyMakeBorder(img1,10,10,10,10,cv2.BORDER_REFLECT_101)
wrap = cv2.copyMakeBorder(img1,10,10,10,10,cv2.BORDER_WRAP)
constant = cv2.copyMakeBorder(img1,10,10,10,10,cv2.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(‘REFLECT101‘)
plt.subplot(235),plt.imshow(wrap,‘gray‘),plt.title(‘WRAP‘)
plt.subplot(236),plt.imshow(constant,‘gray‘),plt.title(‘CONSTANT‘)

plt.show()