Defines the restricted recognition characters, so called characters whitelist, that are allowed during subsequent OCR processes. The recognition is limited to the provided characters, that means the engine returns only the specified characters when processing.

For example, if you want to recognize only numeric characters, set this parameter to "0123456789". If you want to recognize only uppercase letters, set it to "ABCDEFGHIJKLMNOPQRSTUVWXYZ". Set this parameter to the empty string to recognize all characters.

'Declaration
 
Public Property CharacterSet As String

public string CharacterSet {get; set;}

public read-write property CharacterSet: String; 

public function get,set CharacterSet : String

public: __property string* get_CharacterSet();
public: __property void set_CharacterSet( 
   string* value
);

public:
property String^ CharacterSet {
   String^ get();
   void set (    String^ value);
}

Using gdpictureOCR As GdPictureOCR = New GdPictureOCR()
 
    gdpictureOCR.CharacterSet = "0123456789"
 
    'You can do your another stuff with gdpictureOCR here.
End Using

using (GdPictureOCR gdpictureOCR = new GdPictureOCR())
{
    gdpictureOCR.CharacterSet = "0123456789";
 
    //You can do your another stuff with gdpictureOCR here.
}