Hi,<br><br>I'm running latest SANE from git source on Ubuntu 9.10. I was testing scaning A4 on Fujitsu ScanSnap 500 in 300 dpi Color uncompressed using scanadf. Everything is fine when scanning only one side of sheet (image size 24MB). But when scanning with "ADF Duplex" as source, scanner pauses 3 times during scanning. Two 24MB files are saved successfully. Clearly pausing is caused by data transfer issues somewhere. Any ideas where could be the bottleneck? Scanner can't send data so fast over USB? Buffer too small for USB transfers, so too many data exchange transactions creates delay and slowdown of throughput? I guess scanner is sending data from duplex scan interleaved - data block for front side, data block for back side. Inefficient processing of such data in fujitsu-backend? Maybe problem caused by scanadf (or any other frontend), that can read images only one by one? Any ideas?<br>
<br>What is the status of SANE 2.0? Is there any functionality for retrieving many images simultaneously from one physical scan, like front and back of page during duplex scan, several image regions on pages? <br><br>Best regards,<br>
Ilmars Poikans<br>