'current 2 Cameras 2 Data collection 2 Deep neural networks 2 Distance estimation 2 Estimating method 2 Monocular cameras 2 Monocular distance estimation 2 Network-based 2 Object detection 2 Object distance 2 Object recognition 2 Overall networks 2 ShuffleNets 2 deep neural networks 2 monocular distance estimation object detection 2