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# -*- coding: utf-8 -*-

import cv2

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

image_v = cv2.vconcat([image, image])

cv2.imshow("Result", image_v)

cv2.waitKey(0)

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# -*- coding: utf-8 -*-

import cv2

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

image_h = cv2.hconcat([image, image])

cv2.imshow("Result", image_h)

cv2.waitKey(0)

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import cv2

img = cv2.imread('icon/big.jpg')

img2=cv2.imread("icon/small.jpg")

def vconcat_resize_min(im_list, interpolation=cv2.INTER_CUBIC):

    w_min = min(im.shape[1] for im in im_list)

    im_list_resize = [cv2.resize(im, (w_min, int(im.shape[0] * w_min / im.shape[1])), interpolation=interpolation)

                      for im in im_list]

    return cv2.vconcat(im_list_resize)

im_v_resize = vconcat_resize_min([img, img2])

cv2.imwrite('opencv_vconcat_resize.jpg', im_v_resize)