Question

How to remove low-level confidence characters in FineReader Engine 12?

Answer

You can remove low-level confidence characters from a paragraph with the following code, assuming a paragraph is a CSafePtr<IParagraph> object and the level is an int variable, which is the minimum level of confidence for characters.

//CSafePtr<IParagraph> paragraph = ...
//int level = ...
int shift = 0;
CBstr text;
CheckResult(paragraph->get_Text(text.GetBuffer()));
CSafePtr<ICharParams> charParams;
CSafePtr<ICharacterRecognitionVariant> charRecVar = 0;
int charLevel = 0;
CheckResult(Engine->CreateCharParams(&charParams));

for (int index = 0; index < text.Length(); index++) 
{
   CheckResult(paragraph->GetCharParams(index - shift, charParams));
   CheckResult(charParams->get_SelectedCharacterRecognitionVariant(&charRecVar));
   if (charRecVar) //The property contains zero for non-printable characters (spaces, carriage returns, etc.). 
   {
       CheckResult(charRecVar->get_CharConfidence(&charLevel));
       if (charLevel < level)
       {
            CheckResult(paragraph->Remove(index - shift));
            k++;
       }
   }
}