On Sun, 6 Nov 2011 22:14:54 -0800, TP <wing...@gmail.com> wrote: > On Sun, Nov 6, 2011 at 1:59 PM, Pieter Praet <pie...@praet.org> wrote: > > On Sat, 5 Nov 2011 16:35:11 -0700, Samuel Wales <samolog...@gmail.com> > > wrote: > >> I used to find that 8-bit 75dpi was legible and small. > >> > > > > True. > > > > It all depends on why you're scanning them in the first place. > > > > 75dpi is fine when scanning with collaboration/quick-reference in mind, > > but for archival/backup purposes (i.e. absolute peace of mind when your > > whole collection of dead trees burns, drowns, or is simply disposed of) > > or OCR, you'll want to go with 600dpi and beyond. > > One common technique is to always scan 300dpi grayscale (or color) and > use clever software to upsample to 600dpi b&w (of course somehow > segmenting scans into "picture" and "text" regions first. >
Upsampling defies the first law of thermodynamics? But seriously, after reading up a bit, I'm convinced :) Quite a manual process though... Could you recommend any (FOSS) software that does this automatically? > >> What ADF scanners are out there for Linux that have high quality > >> reliable ADF, [...] > > > > I wish I knew... If anyone on this list can think of a scanner whose > > ADF doesn't require constant babysitting, I'm betting it won't have a > > consumer-grade price tag. > > I've heard nice things about the Fujitsu ScanSnap S1500 > (http://www.fujitsu.com/global/services/computing/peripheral/scanners/product/s1500/) > and S1500M > (http://www.fujitsu.com/global/services/computing/peripheral/scanners/product/s1500m/). > About $450 or so from amazon. The S1300 is about half the price but > also slower. > > Apparently the S1500's are supported on Linux via Sane > (http://www.sane-project.org/sane-backends.html#S-FUJITSU). Don't see > any mention of the S1300 (but it probably also works?). > Peace -- Pieter
