"{input i | | Set input to a certain image, omit if using camera}"
"{model m | face_detection_yunet_2022mar.onnx | Set path to the model}"
"{backend b | opencv | Set DNN backend}"
"{target t | cpu | Set DNN target}"
"{save s | false | Whether to save result image or not}"
"{vis v | false | Whether to visualize result image or not}"
/* model params below*/
"{conf_threshold | 0.9 | Set the minimum confidence for the model to identify a face. Filter out faces of conf < conf_threshold}"
"{nms_threshold | 0.3 | Set the threshold to suppress overlapped boxes. Suppress boxes if IoU(box1, box2) >= nms_threshold, the one of higher score is kept.}"
"{top_k | 5000 | Keep top_k bounding boxes before NMS. Set a lower value may help speed up postprocessing.}"