Isophotal Contour Maps of Sunspots

Simplifying Massive Contour Maps

We present a simple, efficient and practical algorithm for constructing and subsequently simplifying contour maps from massive high-resolution DEMs, under some practically realistic assumptions on the DEM and contours.

Sunspots and Coronal Bright Points Tracking using a Hybrid Algorithm of PSO and Active Contour Model

In the last decades there has been a steady increase of high-resolution data, from ground-based and spaceborne solar instruments, and also of solar data volume. These huge image archives require efficient automatic image processing software tools capable of detecting and tracking various features in the solar atmosphere. Results of application of such tools are essential for studies of solar ac...

Contour Extraction and Visulization from Topographic Maps

Recognition of features in topographic maps is useful for GIS applications. In particular, elevation data can be extracted and utilized by recognizing contour lines in maps. In this project, the viability of contour extraction using image segmentation and Delaunay triangulation for line reconstruction was investigated. Results suggest that, while the method has a high success rate for well beha...

Contour Lines Recognition from Raster Topographic Maps

Map digitization is still an ongoing research in development of GIS, photogrammetry, remote sensing, military, urban planning and etc. Majority of recent approach, either associates with human interaction or semi-automated process are insufficient in various aspects. There are usually time-consuming, inefficient, and shown inaccuracies in digitized data. This research is intended to develop an ...

Contour Line Recognition From Scanned Topographic Maps