On Dec 18, 2007 9:05 AM, Giuseppe Sacco <giuseppe at eppesuigoccas.homedns.org> wrote: > Il giorno mar, 18/12/2007 alle 08.40 -0500, m. allan noah ha scritto: > > On 12/18/07, Giuseppe Sacco <giuseppe at eppesuigoccas.homedns.org> wrote: > [...] > > 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... > > You are right: the slide feeder works as you imagene, but if you have a > negative stripe, then you have to position on a variable offset from the > start of the stripe. The offset depends from how the camera moved it > when shooting, or based on the way you cutted the image. > This means that there is no fixed offset for frame, but there are > backend that coud accept an offset as parameter. > > This offset require an interaction between user and backend. >
ahh- so how does the user determine this offset? does he measure the strip before placing it in the machine? allan > > -- > sane-devel mailing list: sane-devel at lists.alioth.debian.org > http://lists.alioth.debian.org/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > to sane-devel-request at lists.alioth.debian.org > -- "The truth is an offense, but not a sin"
