Application Of Anti-alisaing Technology And Filtering Techniques In The Map Visualization

Based on the existing computer equipment and the theory of processing image and graphics in computer, to research the phenomenon of existing aliasing in electronic map visualization from the viewpoints of computer algorithm and theory application, and then to establish the maths model for the visualization processing of the relevant electronic map data. After processing the map data by the anti-aliasing technology and then convert the format from a graphics to a image so as to process them by filtering technology, and to optimize the electronic map visualization within the efficiency limit as far as possible to satisfy the demand of maps users on the side of visual enjoyment. Thus explore out the technology route for the processing visualization of the electronic map.According to the characteristics of the visualized express for electronic map, improving the processing methods of aliasing technology for the electronic map is an extension of application fields of the computer graphics in application fields of GIS. It is convenient for improving the quality of the display and fully expressing related information contained by the electronic map to improve the software algorithm for different aliasing phenomenon in the actual electronic map visualization. The key research of this paper is to improve the visual appearance for maps. Give out the application and improvement to anti-aliasing and filtering algorithms in the domain of computer graphics and image, so as to realize the application of the anti-aliasing algorithms and filtering algorithms in the visualization of the electronic map. The main researches are as follows:1. Put the Wu anti-aliasing algorithm and Bresenham anti-aliasing algorithm into the use of solving the aliasing phenomenon.2. Based on anti-aliasing algorithm of the Wu algorithm and Bresenham algorithm, to make the improvement after the research of the related model to solve the aliasing problem of line edge and interface parts.3. Research the processing method for the aliasing of random curve based on the curve curvature.4. Make the filtering processing to the image converted from the graphics which have treated by anti-aliasing technology, thus eliminate graphic hyperspectral and improve the quality of the graphics display.5. To realize the development of anti-aliasing algorithm and the application of the filter algorithm by the Visual c + + 6.0, and put it into the actual project.