In this paper we present the state of the art for detecting text in images and video frames and propose an edge-based algorithm for artificial text detection in video frames. First, an edge map is created using the Canny edge detector. Then, morphological filtering is used, based on geometrical constraints, in order to connect the vertical edges and discard false alarms. A connected component a...

In this paper, we solve in polynomial time the maximum edge disjoint paths problem and the related minimum unweighted multicut problem in grid graphs. Let G = (V,E) be an undirected rectilinear grid and let L be a list of K pairs (source sk, sink tk) of terminal vertices of G. Each pair (sk, tk) defines a net. We assume that sources are on the upper horizontal line, sinks are on the lower horiz...

In this article we suggest a fast multi-scale edge-detection scheme for medical ultrasound signals. The edge-detector is based on well-known properties of the continuous wavelet transform. To achieve both good localization of edges and detect only significant edges, we study the maxima-lines of the wavelet transform. One can obtain the maxima-lines between two scales by computing the wavelet tr...

The problem of extracting spectral lines from sonar images is treated using a complete scheme that combines an edge detector with a line tracing process. Comparative performance results confirm the efficiency and the reliability of the proposed approach.

In this paper, we obtain some upper and lower bounds for the general extended energy of a graph. As an application, we obtain few bounds for the (edge) Zagreb energy of a graph. Also, we deduce a relation between Zagreb energy and edge-Zagreb energy of a graph $G$ with minimum degree $delta ge2$. A lower and upper bound for the spectral radius of the edge-Zagreb matrix is obtained. Finally, we ...

This paper presents the concept of a fidelity slider, which is a user-defined method that enables trading off accuracy for performance in a parallelized application. The slider is defined in the context of the Canny edge detector, but can be generalized to other image processing algorithms. The slider moderates discontinuity issues introduced by an image-slicing technique used to increase the l...