On 28.03.2008, at 19:02, Alessandro Zummo wrote: > On Fri, 28 Mar 2008 15:49:17 +0100 > Rene Rebe <rene at exactcode.de> wrote: > >> >> Right now the only thing I miss are marks for infra-red frames, and >> maybe >> a ability to pass duplex data without buffering the rear side, which >> becomes >> even more of a problem with the next generation, higher end devices I >> got > > I'm interested in this.. you receive the data of two pages at > the same time? It's interleaved in some way?
I speak about the duplex devices here, which have 2 CCDs (or similar and scan both sides at the same time (long supported by the Avision backend, btw. :-) Avision developed several ways to transfer the duplex data (aside from the few, trivial) paper flipping devices with just a single CCD), for some they buffer the page in-memory inside the scanner, for newer ones there are several interlaced variants. For the interlaced variants I so far buffer the rear stripes in the backend and return the backed data every second frame. Probably the fujitsu backend does something similar. Yours, -- Ren? Rebe - ExactCODE GmbH - Europe, Germany, Berlin Gesch?ftsf?hrer: Susanne Klaus, Ren? Rebe Sitz: Berlin, Amtsgericht Charlottenburg HRB 105 123 B USt-IdNr.: DE251602478 http://exactcode.de | http://t2-project.org | http://rene.rebe.name