[Insight-users] Question about "Surface extraction"

[hubaoping]

Hello,everyone,
     I have a question about the "Surface extraction".The code in the program "SurfaceExtraction.cxx":
  const PixelType objectValue = static_cast<PixelType>( atof( argv[2] ) );
  meshSource->SetObjectValue( objectValue );
 
   which range can"atof( argv[2] )" set to be?
 
 Regards, Hu
 
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