Vision-based Sliding Mode Control with Exponential Reaching Law for Uncooperative Ground Target Searching and Tracking by Quadcopter Topics: Autonomous Agents; Drones and Internet of Things for Surveillance; Guidance, Navigation and Control; Mobile Robots and Autonomous Systems; Modeling, Simulation and Architecture; System Modeling In Proceedings of the 19th International Conference on Informatics in Control, Automation and Robotics ICINCO - Volume 1, 555-564, 2022 , Lisbon, Portugal