Taking input from the user using

img1 = cv2.imread("imageone.jpg")

img2 = cv2.imread("imagetwo.png")

Converting both the images into RGB format from BGR

img1 = cv2.cvtColor(img1,cv2.COLOR_BGR2RGB)

Showing image using Matplotlib

plt.imshow(imagename)

Make sure that both the images are of same sizes to add them together one can check the shape of the image and confirm whether both image has same size

using

imgname.shape

return (x,y,[RGB])

Cropping the image

cropimg1 = img1[1000:1700 , 400:1300]

plt.imshow(cropimg1)

Resizing the image

cropimg1= cv2.resize(cropimg1,(900,400))

cropimg2= cv2.resize(cropimg2,(900,700))

Swapping the Two part

img1[1000:1700 , 400:1300] = cropimg2

plt.imshow(img1)

Concatenating the hstack

newimg = np.hstack((img1,img2))

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Take 2 images, crop some part of both the images and swap them