Month: September 2016

Focusing of Static and Moving Targets in Real Flight Conditions using SAR Technique

Synthetic aperture radar is a very popular and widely used instrument for various remote sensing tasks. One of the most challenging problems is to obtain high-quality images in the case of unstable flight conditions. In the paper the problem of full platform motion compensation is discussed. A particular attention is given to the analysis of moving targets. Algorithm for estimation of moving target parameters is developed. Experimental results with real data are illustrated.

Marker-Based Augmented Reality
Marker-Based Augmented Reality

Augmented Reality (AR) is one of the most popular and challenging fields in computer vision research. It allows supplementing the real world with some kind of digital content, for example, virtual 3D objects. The key feature of Augment Reality in comparison to other image processing tools is that virtual objects are moved and rotated in 3D coordinates instead of 2D image coordinates.

Autofocusing SAR Images via Local Estimates of Flight Trajectory

High-resolution imaging with an airborne synthetic aperture radar (SAR) calls for precise trajectory measurements that can hardly be achieved with common navigation systems. In this paper, an efficient method called the local-quadratic map-drift autofocus is developed for the estimation of residual (uncompensated) motion errors directly from the received radar data. The map-drift autofocus is applied locally on short time intervals to estimate the cross-track components of the aircraft acceleration.