[{
    "gopro":{
        "MODEL":{
            "hero8 black":{
                "focal_x": 0.47720253548498875,
                "focal_y": 0.4776476227437118,
                "k1": -0.004417272934201867,
                "k2": 0.0026456102958567146,
                "c_x": -0.0017664444590190724,
                "c_y": 0.006393052002726844,
                "p1": 0.0, "p2": 0.0, "k3": 0.0,
                "projection_type": "brown"
            }
        },
        "FOCAL":{
            # GoPro Hero 3, 7MP medium
            20: {"focal": 0.625, "k1": -0.37, "k2": 0.28},
            # GoPro Hero 3, 7MP wide
            15: {"focal": 0.466, "k1": -0.195, "k2": 0.030},
            # GoPro Hero 2, 5MP medium
            23: {"focal": 0.71875, "k1": -0.38, "k2": 0.24},
            # GoPro Hero 2, 5MP wide
            16: {"focal": 0.5, "k1": -0.39, "k2": 0.22},
        }
    },
    "garmin":{
        "MODEL":{
            # "v2 garmin virb 4608 3456 perspective 0"
            "virb": {"focal": 0.57, "k1": -0.30, "k2": 0.06},
            # "v2 garmin virbxe 3477 1950 perspective 0.3888"
            # "v2 garmin virbxe 1600 1200 perspective 0.3888"
            # "v2 garmin virbxe 4000 3000 perspective 0.3888"
            # Calibration when using camera's undistortion
            "virbxe": {"focal": 0.466, "k1": -0.08, "k2": 0.0}
        }
    },
    "drift":{
        "MODEL":{
            "ghost s": {"focal": 0.47, "k1": -0.22, "k2": 0.03}
        }
    },
    "xiaoyi":{
        "ALL": {"focal": 0.5, "k1": -0.19, "k2": 0.028}
    },
    "geo":{
        "MODEL":{
            "frames": {"focal": 0.5, "k1": -0.24, "k2": 0.04}
        }
    },
    "bullet5s":{
        "ALL": {"focal": 0.57, "k1": -0.30, "k2": 0.06}
    },
    "sony":{
        "MODEL":{
            "hdr-as200v": {"focal": 0.55, "k1": -0.30, "k2": 0.08},
            "hdr-as300": {"focal": 0.3958, "k1": -0.1496, "k2": 0.0201}
        }
    },
    "PARROT":{
        "MODEL":{
            "Bebop 2": {"focal": 0.36666666666666666, "projection_type": "fisheye"}
        }
    },
    "dji":{
        "MODEL":{
            "fc300s": {
                "focal": 0.5930666527479901,
                "k1": -0.012137318698010527,
                "k2": 0.016199087342953698
            }
        }
    },
    "skydio":{
        "MODEL":{
            "2": {
                "focal_x": 0.5890650637205782,
                "focal_y": 0.5893009528604379,
                "c_x": 0.006414544008217537,
                "c_y": 0.007804076177596079,
                "k1": 0.007400489742572139,
                "k2": -0.01564249925934293,
                "p1": -0.007885887470989788,
                "p2": 0.007514503550147163,
                "k3": -0.0019150459181816895,
                "projection_type": "brown"
            }
        }
    }
}]
