I'm developing a scanning app.
I'm setting PixelType
currentDevice.PixelType = PixelType.BW;
and it doesn't throw exception. But scanner uses its own settings (ie it scans RBG as it is set in its UI. I set ShowUI = false).
I've tried your WpfTwainAdvanced demo and I choose BW from the Pixel Type combo but it scans RGB.
SDK version: 9.0.1.1.
Scanner: Canon DR-C130