We describe a novel multiplexing approach to achieve tradeoffs in space, angle and time resolution in photography. We explore the problem of mapping useful subsets of time-varying 4D lightfields in a single snapshot. Our design is based on using a dynamic mask in the aperture and a static mask close to the sensor. The key idea is to exploit scene-specific redundancy along spatial, angular and t...

This paper presents a computationally tractable, resolution-complete algorithm for generating dynamically feasible trajectories for N interchangeable (identical) aerial robots navigating through cluttered known environments to M goal states. This is achieved by assigning the robots to goal states while concurrently planning the trajectories for all robots. The algorithm minimizes the maximum co...

This paper deals with a numerical approach to control aggressive maneuvers of a multi-rotor aerial vehicle. The proposed controller uses an approximate tabulated one-step time discretization of the state-space model to find out the outputs of controller. It objective is to minimize the distance between the plant output and a linear well chosen closed loop system used as reference, leading the s...

Direct measurement of exterior orientation parameters has been a challenge in photogrammetry for many years. Direct sensor orientation using a calibrated GPS/IMU system can potentially eliminate the need for ground control points and aerial triangulation, and consequently, result in a great reduction in the cost and time of aerial photogrammetry. Previous studies have shown that, comparing to c...

In this paper we presented a novel approach for building detection from multiple aerial images in dense urban areas. The approach is based on accurate surface reconstruction, followed by extraction of visible building facades, then used as a main cue for building detection. For the facade detection a simple but nevertheless flexible and robust algorithm is proposed. It is based on observation t...

Meadow voles responded to harrier and kestrel flyovers by looking-up and tracking the flight path of the bird, by entering into behavioral freezes, or by running into their nest cans. Voles responded more frequently when they could see, as well as hear, the bird overhead. When they could see the bird overhead, voles responded more frequently to the harrier than to the kestrel. Shifts in the fli...

In order to meet the basic need of farmland image processing for non-professionals, to realize intelligent selection of image processing steps and common methods which were classified and analyzed based on knowledge description and inference of intelligent decision in this paper. According to the image features and requirements of users, the related rules were designed and then the color spaces...

This paper is concerned with using linear features in aerial triangulation. Without loss of generality, the focus is on straight lines with the attempt to treat tie lines in the same fashion as tie points. The parameters of tie lines appear in the block adjustment like the tie points do. This requires a unique representation of lines in object space. We propose a four-parameter representation t...