

Also I have searched the sample photos delivered by digital film scanner.

I have made some searches on both flatbed scanner and digital film scanner recently. The sheet-feeding page scanner is from Brother and works with SANE and gscan2pdf nicely.

In the end, since i had many hundreds of slides and negatives to scan, I replaced the flatbed with an auto-sheet-feeding page scanner and a dedicated negative/slide scanner. It was a huge hassle to use even for regular paper scans. I had an epson flatbed with negative attachment and it didn't product nearly as good scans. Flatbed scanners aren't usually designed for negative scanning. I think there is commercial software for $100 for Linux software, but I've avoided that. The driver software for it for WinXP was included. I don't have 20.04 connected to any scanners.
