A common practice when carrying out self-calibration of a camera from one or more views is to start with a guess at the principal point. The general belief is that inaccuracies in the estimation of the principal point do not have a significant effect on the other calibration parameters. It is the purpose of this paper to refute that belief. Indeed, it is demonstrated that the determination of t...

A new antenna system concept is presented where a wide-scan focal plane array used to achieve point-to-multipoint communication. The of parabolic toroid reflector populated with several arrays, the positions which determine directions beams. This investigated for beams pointed towards 0° (broadside) and 28° in azimuth. Each allows scanning an additional ±1° azimuth elevation. compensation twist...

The literature concerning nonlocal boundary value problems is extensive. Moreover, applications of fixed point theorems to positive solutions of such has sparked much interest, see [9, 10, 11, 12]. Many of the results involving nonlocal boundary value problems are summarized in [9]. A more general summary of positive solutions results for a variety of differential equation types is available in...

These lines are the intersections of the plane through the point p in the world and the centres of the left and right cameras with the two camera focal planes (see Figure 1). These epipolar lines are formed by the intersections of the pencil of planes through the line joining the image centres with the camera focal planes. Hence such lines form a pencil passing through the point of intersection...