Returns or sets whether the Data Source (the scanner) discards blank images during scanning.
.IfAutoDiscardBlankpages = true;
Currently this property is only valid in Windows & Mac.
The property works only if the device and its driver supports discarding blank pages.
You can find whether your device supports this capbility from its user manual. Or, you can use the built-in methods of Dynamic Web TWAIN to detect blank images: