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We present a system consisting of a miniature unmanned aerial vehicle (UAV) and a small carrier vehicle, in which the UAV is capable of autonomously starting from the moving ground vehicle, tracking it at a constant distance and landing on a platform on the carrier in motion. Our visual tracking approach differs from other methods by using low-cost,(More)
— We present the evolution of a highly-efficient system for visually detecting number signs in real-time on a mobile robot with limited computational power. The system was designed for use on a robot participating in the 2010 " SICK robot day " robotics challenge, in which the robot needed to autonomously find 10 number signs and drive to all of them in a(More)
— Vision-based robot localization in outdoor environments is difficult because of changing illumination conditions. Another problem is the rough and cluttered environment which makes it hard to use visual features that are not rotation invariant. A popular method that is rotation invariant and relatively robust to changing illumination is the Scale(More)
— In this paper we investigate the effectiveness of SURF features for visual terrain classification for outdoor flying robots. A quadrocopter fitted with a single camera is flown over different terrains to take images of the ground below. Each image is divided into a grid and SURF features are calculated at grid intersections. A classifier is then used to(More)
—Face detection is an important component for mobile robots to interact with humans in a natural way. Various face detection algorithms for mobile robots have been proposed; however, almost all of them have not yet met the requirements of the accuracy and the speed to run in real time on a robot platform. In this paper, we present a method of combining(More)
— We present a follow-the-leader scenario with a system of two small low-cost quadrocopters of different types and configurations. The leader is a Parrot AR.Drone which is controlled by an iPad App utilizing the visual odometry provided by the quadrocopter and pilots it autonomously. The follower is an Asctec Hummingbird which is controlled by an onboard(More)
— In this paper, we present a robust method for detecting multiple balls without using color information. The method builds upon the boosted Haar classifier approach introduced by Viola et al. [11] and is applied onto an image from a catadioptric camera without performing rectification of the image. We compare the method with one based on a classical color(More)
— In this paper, we compare three different marker based approaches for six degrees of freedom (6DOF) pose estimation, which can be used for position and attitude control of micro aerial vehicles (MAV). All methods are able to achieve real time pose estimation onboard without assistance of any external metric sensor. Since these methods can be used in(More)