A sheetfeed scanner seems the best device to use (after removing parts). Depending on your specifications, tests with a webcam can also deliver enough information (remove the lines with data you don't need). A modified xcam backend is maybe also usable.
On Thu, 2007-08-09 at 09:35 -0400, m. allan noah wrote: > the problem here is not sane. infact, sane is not all that useful to > you, as it is designed as an interface to setup a wide variety of > parameters on 2-d scan, and aquire an image occasionally. you would be > better off probably writing a stand-alone libusb program to aquire the > data. > > your big problem is hardware. every manufacturer does something > different in terms of the control language. cheaper units typically > rely on the host computer for many functions, and feature a very low > level command set (lamp on, move head 1 step, read 1 line, etc). more > expensive machines have higer-level commands which rely on the cpu in > the scanner (accept scan params, scan) > > you need to give more data about the size of read-head you need, the > bit-depth, and your intended use, before anyone can suggest a > particular model of scanner. > > allan > > On 8/9/07, Justin Rosen <rosen at nanotoon.com> wrote: > > Hello! > > > > I've recently stumbled upon the SANE libraries in an effort to gain > > access to a scanner. What I would like to do, is be able to read > > from a scanner, but not to create an image, but instead to pull RGB > > data from a single line of scan. Meaning I only need a scan size of > > 1 pixel x width of scanner. Also, I don't necessarily need the > > flatbed itself. Is it possible with SANE to access a scanner that > > has been taken apart? I essentially need the RGB values of the > > scanning head in realtime (I'm not sure what the terminology is for > > the portion of the scanner that actually gets color values). > > > > So imagine the scanner as a color sensor constantly pumping out an > > array of RGB colors, where the array size is the width of the scanner. > > > > I'm completely new to the SANE libraries, I've read the SANE Standard > > and compiled the SANE libraries and I'm stuck on the fact that I > > think the scanner I purchased is broken, so I'm at a halt for the > > moment, but thought I could get a little more insight on my issue. > > > > I thought my idea above could be possible using SANE for a few > > reasons. If I were to write a front-end that used a scanner to scan > > an area of 1pixel x scanner width per frame, and to continually scan > > frames until I told it to stop, I could receive RGB data as fast as > > the scanner could scan (hopefully real-time). If this can be done, > > great! I need to really figure out how to write the front-end! The > > only problem I see is that I'm hoping to take the scanner apart and > > use just the sensor to pull data from. I noticed that some of the > > SANE calls may fail if the SANE_Status is SANE_STATUS_COVER_OPEN, > > which leaves me to believe I won't be able to take the scanner apart > > and just pull RGB data from the scanner head. > > > > If anyone can answer any or part of my questions or point me in the > > right direction it would be greatly appreciated. > > > > Thanks for your time. > > > > Cheers, > > Justin Rosen > > > > -- > > 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" > -- -------- m.vr.gr. Gerard Klaver
