Lesson 9. Symbol Recognition in Automatic Vectorization
Brief description:
During this lesson you will learn how to train
WiseImage to recognize raster symbols, recognize symbols when vectorizing,
and work with the WiseImage clipbook.
 For detailed information on these subject see Working with raster symbols section of the Quick Start guide.
Choose Open from the File
menu, and then open the Electr.cws file from
the Lesson_9 folder.
Our task is to recognize units of the electric scheme
when vectorizing - replacing them with the corresponding vector blocks.
You need to train the program to recognize raster symbols.
Training to recognize symbols
To recognise a raster symbol, you need to create a corresponding
vector template. In this example we intend to use the units of the existing
clipbook (electr.clb) as corresponding vector templates for the scheme
units.
- Choose Clipbook
from the Tools menu.
- Using the Open button, load the Clipbook of electric
units - Electr.clb from the Lesson_9
folder.
- Using the mouse, move the Clipbook items into the drawing. Note
that these items are blocks.
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- Select the first vector symbol.
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- Start the Train Symbol command from the Convert
menu. The selected vector symbol appears in the Train Symbol
dialog.
- IMPORTANT! Select connection lines for the symbol
with the Select connection lines button
 .
(Connection lines are lines of variable length, with which
a symbol is connected to other objects).
- Press the Save As
button of the Train Symbol
dialog.
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- Save the symbol template with the name - elec_1.
INFORMATION: By default templates are saved in the
Shapes folder, located in the program
folder. You can create your own subfolders to save new symbols in,
e.g. for this exercise, create a subfolder called Training.
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- Choose the next vector symbol.
- Press the Create Symbol from selection
button - the new symbol appears in the Train Symbol dialog.
- Repeat this procedure for all symbols contained in the Clipbook with
the names - elec_2, elec_3, elec_4, elec_5,
elec_6 and elec_7 - so you train the program to recognize
all these symbols.
- Close the Train Symbol and Clipbook dialogs.
Tuning vectorization parameters
Choose Conversion Options
from the Convert menu.
Note that when loading the example, the vectorization parameters stored
in the Electr.cws document file are loaded too. So, in this
example we are only going to tune symbol recognition.
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To turn on symbol recognition, do the following:
- In the Recognition tab of the R2V Conversion
Options dialog, select Symbols.
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- Open the Symbols tab.
- Select the newly created group of symbols - Training,
or each separate symbol presented in the scheme.
- Set Strategy - Standard or Smart.
- Set the Accuracy slider to the Low
position.
- Select Fixed Scale and set scale equal to 1.
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- In the Orientation field, specify Horizontal and Vertical.
- Press OK.
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Running vectorization
To run vectorization, choose Raster 2 Vector
from the Convert menu.
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Original raster drawing
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Result of vectorization with symbol recognition
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