This paper investigates segmentation based interest points for matching and recognition. We propose two simple methods for extracting features from the segmentation maps, which focus on the boundaries and centres of the gravity of the segments. In addition, this can be considered a novel approach for evaluating unsupervised image segmentation algorithms. Former evaluations aim at estimating seg...

We consider the perturbation of tachyon about the extremal ground state of a two-dimensional (2D) electrically charged black hole. It is found that the presenting potential to on-coming tachyonic wave takes a double-humped barrier well. This allows an exponentially growing mode with respect to time. This extremal ground state is classically unstable. We conclude that the 2D extremal electricall...

Not all interest points are equally interesting. The most valuable interest points lead to optimal performance of the computer vision method in which they are employed. But a measure of this kind will be dependent on the chosen vision application. We propose a more general performance measure based on spatial invariance of interest points under changing acquisition parameters by measuring the s...

Text characters and strings in natural scene can provide valuable information for many applications. Extracting text directly from natural scene images or videos is a challenging task because of diverse text patterns and variant background interferences. This project proposes a method of scene text recognition from detected text regions. In text detection, our previously proposed algorithms are...

For a given stationary max-stable random field X(t), t ∈ ℤd, the corresponding generalized Pickands constant coincideswith classical extremal index θX [0, 1]. In this contribution,we discuss necessary and sufficient conditions for to be 0, positive, or equal 1 also show that is so-called block index. Further, we consider some general functional indices of X prove large class functionals they co...

In this paper we investigate the extremal richness of the multiplier algebra M(A) and the corona algebra M(A)/A, for a simple C∗-algebra A with real rank zero and stable rank one. We show that the space of extremal quasitraces and the scale of A contain enough information to determine whether M(A)/A is extremally rich. In detail, if the scale is finite, then M(A)/A is extremally rich. In import...