History of engineering and technology 6 Technology: general issues 4 Cameras 3 Deep neural networks 3 Monocular cameras 3 Object detection 3 Object recognition 3 'current 2 Data collection 2 Depth Estimation 2 Distance estimation 2 Estimating method 2 Humans 2 Monocular distance estimation 2 Network-based 2 Object distance 2 Overall networks 2 ShuffleNets 2 Vision, Binocular 2 Visual Perception 2 adult 2 binocular vision 2 deep neural networks 2 female 2 human 2 male 2 monocular distance estimation 2 object detection 2 vision 2 ,monocular 1