For training and testing, your directory structure should look like this
`Datasets`
`├──train`
`└──DPDD`
`├──inputL_crops`
`├──inputR_crops`
`├──inputC_crops`
`└──target_crops`
`├──val`
`└──DPDD`
`├──inputL_crops`
`├──inputR_crops`
`├──inputC_crops`
`└──target_crops`
`└──test`
`└──DPDD`
`├──inputL`
`├──inputR`
`├──inputC`
`└──target`