Autodesk 00126-050008-1640A User Guide - Page 197

13 Vectorization The most complicated operation is the raster text recognition using either the built-in module of texts recognition (OCR) or an additional module form a third-party. The WiseImage OCR module recognizes raster texts and creates WiseImage Pro text objects. In addition height and rotation angle of the created texts are calculated. Standard shipment contains two files of OCR characters templates (DEFAULT.OCR and CYRILLIC.OCR), using which the program recognizes the characters of the English alphabet, digits, punctuation marks and special characters (the first half of ASCII table). You can also train the OCR module to recognize any other text characters. If the OCR cannot recognize a character, then it is substituted by the "~" (tilde) in the text line. If none of the word characters is recognized, then the OCR does not generate a text object. Text Recognition Options Orientation - defines the accepted raster text operation. Horizontal only Horizontal and Vertical Searches for horizontal text lines. The text areas will be only horizontal. Searches for horizontal and vertical text lines. The text areas will be only horizontal and vertical. Arbitrary Searches for all text lines. The choice of this option can reduce the speed of text area searches. Overlapped by Graphic If this option is on, then WiseImage searches for raster texts crossing other raster objects. This option can reduce the speed of text area searches. Only Standalone Letters Allows searching for standalone text characters. If this option is off, then WiseImage will not find single text characters, but also will not identify graphics objects as text, such as markers, dash, etc. Patterns To customize the OCR you should specify a set of word pattern. A pattern is a rule specifying an allowed sequence of characters within one recognized word. This list contains definitions of accepted word patterns. WiseImage OCR can generate only words which correspond to one of the specified patterns (if Patterns is checked in Texts tab of Conversion Options dialog). ÞNOTE: This list contains definitions of accepted word patterns. WiseImage Pro OCR can generate only those words which correspond to one of the specified patterns. The Add and Delete buttons Used to edit the list of definitions of word patterns. 203