my.json

{
    "training":[
        {
            "image":["train/1/surface_volume.npy"],
            "label":["train/1/mask.npy"], 
            "ir":["train/1/ir.npy"],
            "inklabels":["train/1/inklabels.npy"]
        },
        {
            "image":["train/2/surface_volume.npy"],
            "label":["train/2/mask.npy"], 
            "ir":["train/2/ir.npy"],
            "inklabels":["train/2/inklabels.npy"]
        }
    ],
    "validation":[
        {
            "image":["train/3/surface_volume.npy"],
            "label":["train/3/mask.npy"], 
            "ir":["train/3/ir.npy"],
            "inklabels":["train/3/inklabels.npy"]
        }
    ],
    "testing":[
        {
            "image":["test/a/surface_volume.npy"],
            "label":["test/a/mask.npy"]

        },
        {
            "image":["test/b/surface_volume.npy"],
            "label":["test/b/mask.npy"]
        }
    ]
}