On Dec 18, 2007 12:37 PM, Jonathan Buzzard <jonathan at buzzard.me.uk> wrote: > > On Tue, 2007-12-18 at 08:40 -0500, m. allan noah wrote: > > On 12/18/07, Giuseppe Sacco <giuseppe at eppesuigoccas.homedns.org> wrote: > > > Il giorno mar, 18/12/2007 alle 12.00 +0000, Jonathan Buzzard ha scritto: > > > > On Tue, 2007-12-18 at 12:13 +0100, Giuseppe Sacco wrote: > > > [...] > > > > > So, my questions: is there already any standard for those action? Is > > > > > there any defined rule for how to name a backend parameter like > > > > > "--frame-number"? Is there any way to know what feeder types are > > > > > available at a given time? > > > > > > > > Good grief, those feelings of d?ja vu. are pretty strong at the moment. > > > > > > > > The basics are that as it stands the SANE standard is heavily geared to > > > > transmission scanning on flatbed scanners. Understandable as it probably > > > > accounts for 99% of users requirements. > > > > > > Is this problem "solved" with SANE2? > > > > would both of you please excuse my ignorance, as i primarily deal with > > ADF machines, but- > > > > why does the front-end need to be involved in the movement at all? can > > the backend not detect the additional slides and move the feeder > > automatically? perhaps i am not picturing the mechanism correctly... > > > > Imagine I have just stuck an APS adaptor into my film scanner and loaded > up a 40 frame APS film. I wish to scan *one* frame which I happen to > know from the contact print I got when they where developed. > > How without the front end telling the scanner which frame to advance to > and scan do you propose scanning this? From memory a TIFF image from an > APS frame on my scanner is about 30MB and takes about 1min over 400Mbps > Firewire. Scanning the lot is utterly impractical. > > With 35mm film, I load the strip into a holder and insert the holder. I > want to scan just two frames from the possible six in the holder, and > they are frame 2 and 4. Oh and I want to scan 4 first so that it is not > sticking out the scanner with dust settling on it. > > Does that illustrate the point?
yes- though i did have to lookup what APS was :) the original question was what to name the SANE options that would control this mess, and i suppose what option type they should be. sounds almost like a comma-separated list: 4,2 or 4,2-1 if you wanted to skip #3. that sounds a bit like the gamma vector control that some backends use... allan -- "The truth is an offense, but not a sin"