A DIGITAL IMAGE PROCESSING APPROACH TO CREATING PINs FROM DIGITIZED CONTOURS
نویسنده
چکیده
DTMs derived from digitized contour lines often suffer from limited quality. The quality can be enhanced by automatically extracting skeleton lines from the contours prior to triangulation and subsequent interpolation. A hybrid set of raster and vector techniques is used for skeleton extraction and TIN generation, including distance transformation, Dirichlet tessellation, thinning, gap filling, line following, interpolation, and establishing topology. The program package has been developed for IBM-compatible PCs and is based on ILWIS. KEY VORDS: DTM, contour lines, skeleton, triangulation, distance transform, tessellation, interpolation, cost-effectiveness
منابع مشابه
Processing Digital Image for Measurement of Crack Dimensions in Concrete
The elements of the concrete structure are most frequently affected by cracking. Crack detection is essential to ensure safety and performance during its service life. Cracks do not have a regular shape, in order to achieve the exact dimensions of the crack; the general mathematical formulae are by no means applicable. The authors have proposed a new method which aims to measure the crack dimen...
متن کاملCracks Inspection and Interpolation in Digitized Artistic Picture using Image Processing Approach
With the effective image processing tools, the digital image processing technique can be applied to the virtual restoration of artistic paintings. For the restoration of artistic work, digital image processing technique serves many purposes. This paper presents approach for virtual digital restoration of artistic paintings which are suffering from the breaks or cracks. An approach includes dete...
متن کاملComputational Geometry of Contour Extraction
We present a method for extracting contours from digital images using techniques from computational geometry. Our approach is different from traditional pixelbased methods in image processing. Instead of working directly with pixels, we extract a set of oriented feature points from the input digital images, then apply classical geometric techniques such as clustering, linking, and simplificatio...
متن کاملComputing of the Burnt Forest Regions Area Using Digital Image Processing
At present, there is no conventional scientific method to evaluate the area of the burnt regions of forests and in this field, the related organizations use different methods and variables. Also, the speed in performing the processes of area computing and damage evaluation, especially in the extensive damaged forest regions is very slow; consequently, the expression of results takes more ti...
متن کاملColor Image-Based Defect Detection Method for Bridge Coating Assessment
This paper presents a highly efficient method for recognizing the existence of bridge coating rust defects by using color image processing. The detection of defects on steel bridge surfaces during the operation and maintenance of bridge structures is important to ensure the safety and reliability of them. More advanced techniques such as digital image processing have been studied for better mon...
متن کامل