On Sun, 2008-07-20 at 20:59 -0400, m. allan noah wrote: > On 7/20/08, kid2k4 at email.it <kid2k4 at email.it> wrote: > > Hi to all (sorry for my english) > > I write from Italy, with other young artist are working on a machine > > that requires a man-size scanner. An A1 or A0 scanner it's very > > exspensive for us, ahah. > > I use Gnu/linux (Debian-like distro) but i'm not i geek, :-( However i > > know the potential of open source software. I thought immediately to a > > solution ad-hoc but i don't know if it's possible. The idea is about a > > big scanner builded with more (6/8). We thought to disassemble scanners > > and take only the parts needed to scan. > > I make us some questions. > > > > - It's possible to control more that one scanner with a tool like SANE? > > - If yes, it's possible to build a single scanned image from the scanned > > images of each machine, in real time :-) > > - If we try to make the scanner on lan an then take each scanned image > > and build one big images? We need one pc for each scanner? > > - More and more.... :-) > > > > I am asking a bit around and seemed a good idea to also ask the > > community of SANE. > > I hope the this idea can make some step to our goals. > > Bye bye. > > 1. the optical package of each scanner cannot be placed end-to-end and > get a complete scan, because there is some dead space for packaging or > mechanism on the ends. so now you have to stagger them, and then have > a staggered calibration strip. correcting skew and adjusting height > will be excercises in very precise machining. > > 2. you will have to have much larger and very rigid guides and carriage. > > 3. you will have to have a much larger motor, or convince the series > of motors to move at EXACTLY the same rate, or some of them will be > dead weight (very difficult to do if they have independent > controllers) > > 4. you will have to multiplex all those streams of data, probably > causing dataloss or motor stoppage/backtracking when the pc cannot > keep up. > > as you can see, software is the least of your problems :) > > i suggest that you change directions. build a very square and sturdy > moving platform, and scan with one scanner, using multiple passes, > shifting the work one width left each time. you would have to stitch > the pieces together afterwards, but that will be easy. > > allan > -- > "The truth is an offense, but not a sin" >
Depends also on the resolution you want to scan, for low resolution try a photo camera. For higher resolution, check if your file size get you in problems. 300dpi A4 colour 8 bit is about 25.5Mbyte, A1 is about 200Mbyte -- -------- m.vr.gr. Gerard Klaver