Autodesk 00126-050008-1620A - Autocad 2006 Essentials User Manual page 197

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
Arbitrary
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.
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.
Searches for all text lines. The choice of this option can reduce
the speed of text area searches.
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