We investigated self-organized patterns formed by a FitzHugh–Nagumo model in three-dimensional space. We found functional orders in the model. The edge plane structure was autonomously extracted from an initial cubic pattern. As in a two-dimensional model, the edge points and edge lines developed spontaneously in this model. These edge structures were obtained when parameters were in a specific...

This paper proposes an algorithm for detecting artificial text in video frames using edge information. First, an edge map is created using the Canny edge detector. Then, morphological dilation and opening are used in order to connect the vertical edges and eliminate false alarms. Bounding boxes are determined for every non-zero valued connected component, consisting the initial candidate text a...

Standard edge detectors usually run in two steps: (i) Detection of edge points; (ii) linking of those points to make a coherent edge feature. Optimal edge detectors were designed ([Can 86]) but this was mainly done on the basis of signal processing aspects and such detectors are often criticized for their failure to detect the most salient edges. New algorithms based on Active Contour Models ha...

Parameterisation of a topographic surface into a framework of fundamental points and lines is a prominent research topic in geographic information science. Metric Surface Network also called Pfaltz's graph or surface network is an example of such a framework. Surface Network is a graph topological data structure and pits, passes, peaks are its three sets of vertices while ridges (lines from pas...

In this paper, a hardware system for Sobel Edge Detection Algorithm is designed and simulated for a 128 pixel, 8-bit monochrome line-scan camera. The system is designed to detect objects as they move along a conveyor belt in a manufacturing environment, the camera will observe dark objects on a light conveyor belt. The edge detector is required to detect horizontal and vertical edges using Sobe...

This paper introduces a method of making 3D models of buildings in a 2D residential digital map, and refining the building data in the digital map. The range image of the streets acquired by line scan laser scanners that moves in the streets is used. The pattern lines of the range image are determined using edge detection or depth analysis. Then these pattern lines are matched with pattern line...

Thresholds for the discrimination of orientation were measured in the human fovea for figures and borders delineated by solid lines and by "pacman" tokens as introduced by Kanizsa, as well as by contours induced by monocular tokens giving a stereoscopic depth illusion of a knife edge. Orientation discrimination of these illusory contours is poorer by a factor of approximately 2 than that of equ...

Background The standard Hough Transform (SHT) is used to determine the parameters of features such as lines and curves within an image. A binary image is used as input where each active pixel represents part of an edge feature. The SHT maps each of these pixels to many points in Hough (or parameter) space. In the case of line detection, a single edge pixel is mapped to a sinusoid in 2D paramete...