dataset/meta_data.json

{
    "data/train_example_image1.jpg": {
        "similar_images": [
            [
                "data/train_example_image2.jpg",
                90
            ]
        ]
    },
    "data/train_example_image2.jpg": {
        "similar_images": [
            [
                "data/train_example_image1.jpg",
                90
            ]
        ]
    }
}