I have many images around 200 thousands and they are being more each day. There are some duplicate in this images. Some of images are excatly same and some of them are cropped, rotated, shifted in x or y axis and so on. I would like to detect the duplicated images. Duplicate means that a part of two images are exactly same, I dont mean different images with different camera view angle, different distance between image and objects. If the images are duplicated, then they are exactly same or their parts match no mater they are rotated, cropped or other things. I added four example images to below.