{
    "key_list" : [
        "plate_number_single",
        "plate_number_double",
        "plate_number_ele",
        "plate_number"
    ],
    "extra_conf" : {
        "plate_number_single" : {
            "expand_ratio_x": 0.25,
            "expand_ratio_y": 0.1
        },
        "plate_number_double" : {
            "expand_ratio_x": 0.1,
            "expand_ratio_y": 0.1,
            "recg_type": 0,
            "skip_recog_B": 1
        },
        "plate_number_ele" : {
            "expand_ratio_x": 0.1,
            "expand_ratio_y": 0.1,
            "recg_type": 0,
            "skip_recog_B": 1
        }
    }
}