Autodesk 00126-050008-1640A User Guide - Page 189

13 Vectorization Automatic vectorization is a procedure for generating vector objects from original raster images. There are two types of vectorization: recognition of raster entities and approximation of raster objects. The vectorization algorithms of the first type search for raster image fragments, which can be represented as basic geometrical AutoCAD entities, and create appropriate vector objects. These algorithms recognize raster analogues of vector entities. WiseImage Pro uses a set of independent recognition algorithms, which can be used in various combinations, which enable you to obtain a vector image of optimal structure. WiseImage Pro recognizes objects of the following types: points, lines, circles, arcs, polylines, hatches, texts and symbols. You can train the program to recognize new characters and symbols. When vectorizing lines, circles, arcs and polylines, the program can recognize the line style of objects, and also arrows on lines and arcs. You can force orthogonal alignment of lines which have a small deviation from either the horizontal or vertical axis. The approximating algorithms are used to vectorize arbitrary raster objects. You can approximate the central lines of arbitrary raster lines by polylines or raster objects by outlines. You can tune the recognition by yourself or use one of the standard sets of parameters - recognition templates. Setting Up Vectorization You can tune vectorization using the Conversion Options dialog box. The main vectorization parameters are set in the Recognition and Options tabs. If the search and recognition of text and symbols are enabled, then you should also set up parameters in the Texts and Symbols tabs, described further in this chapter. You can approximate the widths of objects obtained after vectorization to specified values, and also place them on various AutoCAD layers and assign various colors to them. These operations are configured with the Options tab. The procedure for setting up the parameters of this tab is described in "Controlling Properties of Created Objects " on page 188. To set up vectorization parameters 1. Open the Conversion Options dialog box using one of the following methods: Choose Conversion Options from the rConvert menu or click the Conversion Options button on the Raster to Vector toolbar.