Hello GIPFG,

Thank you for following up. The issue, from my understanding, appears more to do with the reader than the barcode. Unfortunately there is no setting to manage the decode duration for the barcode. I would expect that a barcode that was unable to be decoded to return no symbology found and be instantaneously. You can handle the barcode reader's DecodeCompleted event which will fire very quickly upon calling barcode.Decode() for an image that isn't clear.

eg.

        private void ButtonDecode_Click(object sender, RoutedEventArgs e)
        {
            TextBoxData.Text = string.Empty;

            //Decoding an image.
            _barcodeReader.Decode(_image);
        }
        private void BarcodeReader_DecodeComplete(object sender, ReaderDecodeArgs e)
        {
            //Setting the displayed image to the FilteredImage property of the Barcode Reader.
            //The Filtered Image will show a rectangle with the found barcode.
            ImageContainer.Source = _barcodeReader.FilteredImage;
            if (e.SymbolFound)
            {
                TextBoxData.Text += string.Format
                    (
                        BarcodeReaderStrings.BarcodeReader_DecodedString,
                        e.Symbology, //The Symbology of the decoded barcode.
                        e.Value,     //The Value of the decoded barcode.
                        Environment.NewLine
                    );
            }
            else
            {
                TextBoxData.Text = BarcodeReaderStrings.BarcodeReader_NoSymbology;
            }
            ScrollViewerData.UpdateLayout();
            ScrollViewerData.ScrollToVerticalOffset(double.MaxValue);
        }
    }