The lack of accurate maps of subsurface utilities and other underground hazards often causes accidents, project delays and increased project cost. Subsurface Utility Engineering (SUE) is an engineering process utilizing state-of-the-art technology to accurately identify, characterize, and map underground utilities and installations prior to the design of new highways and structures or the insta...

To explore the effect and applicability of contour reverse slope terraces in water soil conservation karstic red clay area northern Guangxi, rainfall simulation experiments were conducted on bare slopes laid with to find erosion pattern response different intensities (15, 30, 50 mm/h) bedrock porosities (1%, 3%, 5%). The results showed that can change spatial distribution surface runoff, divert...

We present a new contour-based background-subtraction technique to detect people in widely varying thermal imagery. Statistical background-subtraction is first used to identify local regions-of-interest. Within each region, gradient information in the foreground and background are combined to form a contour saliency map. After thinning, an A* path-constrained search along watershed boundaries i...

The automatic recognition, including the character, annotation, contour line and so on, is very important in many fields. Here, we focus on the character recognition of the scanned map, because the digitizing map is an important resource data for GIS and automatic recognition character of scanning map is still a key problem, which needs to be solved seriously. In our investigation, which is abo...

Constant-psi constant-delta contour maps in the reduced angle-of-incidence-film-thickness plane that are useful in ellipsometry and in design of reflection-type optical devices are discussed. As a specific example, a contour map is given for the SiO(2)-Si film-substrate system at the 6328-A He-Ne laser wavelength.

The contour tree is a topological abstraction of a scalar field. It represents the nesting relationships of connected components of isosurfaces or contours. The real-world data sets produce unmanageably large contour trees because of noise and artifacts. This makes the contour tree impractical for data analysis and visualization. A meaningful simplification is necessary to the contour tree. Thi...

extended abstract introduction water resources management in arid and semi-arid areas is very important to provide of water for stakeholders. in recent decades, construction of underground dams have been considered, because of its advantages. these dams have many advantages, e.g., unlike a surface dam, land is not submerged to store water and there is no danger of breaching due to natural or ma...

Segmentation of the left ventricle (LV) is a hot topic in cardiac magnetic resonance (MR) images analysis. In this paper, we present an automatic LV myocardial boundary segmentation method using the parametric active contour model (or snake model). By convolving the gradient map of an image, a fast external force named gradient vector convolution (GVC) is presented for the snake model. A circle...

Scene segmentation is a challenging problem that can be a prelude to many further applications in computer vision. This paper describes a novel MAP framework for automatic and robust scene segmentation in image sequences under mobile camera without any human interaction. First, an initial partition of the scene is achieved by watershed segmentation algorithm. However segmentation based on singl...