Automatic vectorization method for raster partition map with interference pixels

Abstract

The invention provides an automatic vectorization method for a raster partition map with interference pixels, and the method comprises the steps: correcting the raster partition map; carrying out theinteractive supervised classification of the raster partition map, and obtaining single-band raster data; carrying out the raster-to-plane of the single-band raster data, and obtaining an interferenceplane layer; separating the plane map elements in the interference plane layer through cutting; and eliminating the interference plane layer. The method provided by the invention achieves the automatic vectorization of the raster partition map, is quick and accurate, and has certain universality. The method is great in tolerance for the image quality of the raster partition map, and can allow various types of interference pixels to appear on the image. The method achieves the automatic vectorization of the raster partition map with the interference pixels.

Description

technical field [0001] The invention relates to the field of GIS image processing, in particular to an automatic vectorization method for a grid partition map with interfering pixels. Background technique [0002] GIS geographic data is divided into raster data and vector data. The two types of data have their own advantages and disadvantages in geographic applications, so they often need to be converted to each other in data application analysis. It is easier to convert vector to raster, but it is often more difficult to convert raster to vector. The current mainstream GIS software provides some automatic vectorization tools, but the application conditions of these tools are very harsh, few raster data can meet these requirements, and most of the automatic vectorization results of these tools are not reliable. Therefore, at present, most of the vectorization work has to be done manually. Although the efficiency of manual vectorization is very low, there will inevitably be ...

AI Technical Summary

Problems solved by technology

[0006] 2. The semi-transparent interference layer has caused great interference to the image classification, and its superimposed display results have produced a wide variety of interference colors, which do not belong to the color table of the partition map.

[0008] 4. Some of the currently commonly used image formats are lossy compression, such as JPEG and GIF

If these raster zoning maps are resampled by interpolation or scanned into pictures after printing, more serious image distortion will occur and more interfering pixels will be generated.

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