Paper size is not detected correctly, even though [Automatic Size] is configured for [Cropping].
Updated
Size detection may fail when scanning the following documents.
Documents that are not rectangular or square In this case, select [None] for the [Cropping] setting and specify the paper size according to the documents to be scanned.
Documents with a dark background color or documents with straight lines on the edges In this case, select [Accuracy] for [Priority] or change to above setting.
If you are using the [Cropping] function(*) when scanning with the flatbed, refer to "Paper size is not detected correctly with the flatbed scanner.” * For the PaperStream IP driver, [Automatic Size] for [Cropping] is enabled by default.