Autodesk 00126-050008-1620A - Autocad 2006 Essentials User Manual page 207

Symbol tab
The table provides the description of symbol recognition parameters.
Parameter
Srtl path
Strategy
Fixed scale
Accuracy
Orientation
Standalone
Symbols
Description
Defines the path to Symbol Recognition Template Library file
which stores symbol templates and the information on what
symbols should be found and with what they should be replaced.
Defines the strategy used for symbol recognition. The choice of
strategy influences the balance of speed/accuracy of the
algorithm. There are three strategies: Fast, Standard and Smart.
Fast strategy has the highest speed of the raster symbol
analysis, but it may not find symbols even very similar to the
template. Smart strategy operates at the lowest speed, but
yields the most correct results. Standard strategy is used by
default.
This parameter sets the tolerance for recognizing symbols of
various sizes. If the checkbox is on, then only the symbols
whose sizes are proportional to templates with the factors set in
the numerical box will be recognized. When replacing the
recognized raster symbols, this factor will be used for scaling the
inserted vector symbol. If the checkbox is off, then all raster
symbols will be checked on tolerance, and the scaling factor on
replacing will be calculated automatically. In this case the
program operation may be slowed down.
This parameter defines the accepted deviation of raster symbol
geometry compared with to the sample. At High values, the
program will only recognize symbols that are very close in form,
scale and orientation to the sample. At Low values more
symbols will be recognized but the probability of erratic
recognition increases.
Sets possible angular deviations of raster symbols from the
specified templates. If the value Horizontal is selected, then only
the symbols having the same orientation as the specified
templates will be recognized; if you select Horizontal and
Vertical, the symbols rotated by an angle 90° will be recognized;
if you select Arbitrary, the symbols rotated by arbitrary angles
will be recognized. The last option considerably slows down the
operation of recognition algorithms.
This checkbox defines whether the symbol containing raster
objects excluded from the template will be recognized. If the
checkbox is off, then all symbols matching the template will be
recognized, even if they are crossed by raster objects that do not
match objects, set in the template. Otherwise only symbols that
are not crossed by other objects will be retrieved.
13 Vectorization
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