Computation of component image velocity from local phase information
International Journal of Computer Vision
Performance of optical flow techniques
International Journal of Computer Vision
Real-time quantized optimal flow
Real-Time Imaging - Special issue on computer vision motion analysis
Generalized image matching by the method of differences
Generalized image matching by the method of differences
Moving Object Segmentation Using Optical Flow and Depth Information
PSIVT '09 Proceedings of the 3rd Pacific Rim Symposium on Advances in Image and Video Technology
Adaptive neuro-fuzzy inference system based autonomous flight control of unmanned air vehicles
Expert Systems with Applications: An International Journal
Modelling and Control of Mini-Flying Machines
Modelling and Control of Mini-Flying Machines
Observability-based local path planning and obstacle avoidance using bearing-only measurements
Robotics and Autonomous Systems
Journal of Intelligent and Robotic Systems
Hi-index | 12.05 |
In this paper, vision-based autonomous flight with a quadrotor type unmanned aerial vehicle (UAV) is presented. Automatic detection of obstacles and junctions are achieved by the use of optical flow velocities. Variation in the optical flow is used to determine the reference yaw angle. Path to be followed is generated autonomously and the path following process is achieved via a PID controller operating as the low level control scheme. Proposed method is tested in the Google Earth(R) virtual environment for four different destination points. In each case, autonomous UAV flight is successfully simulated without observing collisions. The results show that the proposed method is a powerful candidate for vision based navigation in an urban environment. Claims are justified with a set of experiments and it is concluded that proper thresholding of the variance of the gradient of optical flow difference have a critical effect on the detectability of roads having different widths.