[sane-devel] Scanner Recommendation for long receipts?

[Andy Bennett]

Hi,

I don't have a solution I'm afraid but can offer some solidarity below!


> like CVS/Walgreens long
>
> Is there a scanner out there that can scan up to 24"? or 36?
>
> I've been folding and making a multipage PDF.  Is there a better way?
>
> Is there a reason scanners must have a maximum length or could 
> they just stream data back to the PC continuously until the scan 
> is complete.  like a toilet paper roll for example.

I have wondered about this too but not found any good implementations in 
desktop scanners.

My ix500 has a scanning length that's not quite long enough for some things 
such as certain kinds of official certificates that are A4 width but have 
extra long fold out bits at the end.

I'd suggest cutting the reciept into pieces, but I always hate a solution 
like that when there seems to be No Good Reason why the product doesn't do 
it in the first place. Besides, there may be good reasons to not want to 
cut your document into pieces for the sake of a scan.

For my scenarios it often suffices to scan it one way up and then the other 
because the documents are less than twice the length the scanner can 
handle.
...but that still leaves an annoying amount of post-processing to do. It's 
even harder if the documents are particularly thin (like reciepts) because 
you're more likely to get a wobbly horizontal registration between the two 
scans.


> I have no problem scanning a 700 page document if I keep that 
> ADF feder hopper full and keep the exit tray from filling up on 
> my ADF scanners.  But what reasons are there, that a single page 
> can not be say, 100 feet long?

I guess none in principle. This one (done with a line scan camera which is 
similar to the single pixel-wide CCDs a scanner would use) is as long as a 
train: http://elm-chan.org/works/lcam/g/Y0008.jpg

(via http://elm-chan.org/works/lcam/report.html )

I've seen others that document entire long distance train journeys.


Good luck and please let us know if you find anything!


Best wishes,
@ndy

-- 
andyjpb at ashurst.eu.org
http://www.ashurst.eu.org/
0x7EBA75FF