1) The document discusses object detection and tracking using deep learning techniques such as convolutional neural networks, YOLO, and Single Shot Detector. It reviews literature on existing approaches and proposes a system for multi-purpose security applications using mobile camera detection.
2) Common object detection methods discussed are Faster R-CNN, YOLO, and Single Shot Detectors (SSDs). The proposed system would use these deep learning techniques for automated detection and tracking from mobile cameras.
3) Applications mentioned include surveillance, people counting, drowsiness detection, and more. The growth of mobile phones makes them suitable for real-time detection and tracking technologies.