Comment #2 on issue 583 by sro...@gmail.com: Problem reading certain RSS
Expanded codes
http://code.google.com/p/zxing/issues/detail?id=583
Hmm sounds like a valid issue. There is definitely support for RSS Expanded
-- you can see the unit tests for bits that work. It's complex enough,
enough variations, that there could be a problem with this flavor. I didn't
write that support so am not in a good position to fix it myself.
The main problem with scanning the coupon above is that the symbology is
actually GS1 DataBar (the new name for the RSS symbology family) Expanded
Stacked, which is a multi-layer subset version of Expanded.
"The third type has two variations, a single row variation (GS1
DataBar
Expanded) and a multi-row stacked variation (GS1 DataBar Expanded
Stacked" - ISO/IEC FDIS 24724
So, this brings me to my question/issue. Can the person(s) who did the
initial work on the GS1 DataBar (RSS) decode engine provide an idea of when
the Expanded Stacked decode functionality will work? I am getting ready to
do some research here at Ohio University and need to have the Expanded
Stacked functionality working on both the Android platform and ideally the
iPhone and Blackberry platforms. If funding for your time is necessary so
as to get things done quickly, please contact me at aut...@ohio.edu.
Thanks.
Kevin Berisso
Director, AIDC Lab
Ohio University
Like the comment says, it's already supported in theory. It's probably a
bug.
WYSIWYG here, there are not even part-time people working on the project so
you're welcome to work on it and contribute a patch but there is no roadmap
for any work otherwise.
Comment #5 on issue 583 by dswit...@google.com: Problem reading certain RSS
Expanded codes
http://code.google.com/p/zxing/issues/detail?id=583
Issue 828 has been merged into this issue.
Comment #6 on issue 583 by dswit...@google.com: Problem reading certain RSS
Expanded codes
http://code.google.com/p/zxing/issues/detail?id=583
I've tried scanning the images in this document:
http://www.idautomation.com/barcode/gs1-databar-faq.html
We can handle the first three in Table 1 but not the last. So there are
indeed problems with expanded support. It seems to fail when the code is
both expanded and stacked. For example, in Table 2 we can read the first
image but not the second and third.
If anyone would like to work on this that would be great. Please post a
patch to this issue.
this maybe a bug unsure
Scanned a GS1-128 on the software the Format Type was display as a CODE_128
instead of a GS1_128
GS1-128 is the same as Code 128.
There is a gentleman offering funding to get this issue fixed... I'm not
sure who originally started the implementation of code 128 barcodes, but it
seems like finishing it would be a beneficial thing.
I would be willing to work on this issue, if someone could provide me
access to the relevant standards doc(s) and/or some pointers on what needs
to be done...
The spec for RSS barcodes is described in ISO 24724. ISO specs are not free
though so it couldn't be provided to you directly, but can be bought from
ISO. I think the issue lies in RSS Expanded Stacked barcodes.
Actually, I think the GS1 specification is open. It's a substandard of
code128,
But this is from my limited understanding. I'm probably making everything I
just said up.
Here's a document on the symbols contained in GS1-128
http://www.gs1tw.org/twct/gs1w/download/GS_Section_5-3_V7.pdf
Attachments:
GS_Section_5-3_V7.pdf 215 KB
The original issue is really about a format that is not GS1-128 (which is
Code 128).
I too am doing research and am in need of being able to scan gs1 databar
(formerly rss) expanded stacked barcodes such as those on coupons. Is
there an estimated date that this will be working on the barcode reader
software for android?
No, there is no roadmap for anything here. I would assume that you need to
supply a patch if you want it done.
Me and one of the original authors of RSS14 support have started work on
expanded stacked, such as used on newer US coupons. The code works on some
test images, but could use further work to be more robust. I haven't been
able to devote much time to this lately, so I can't make any promises about
when/if I'll be able to do that. But you can see the changes we've made so
far at this address:
https://dev.morelab.deusto.es/trac/rssexpanded_stacked
I'd suggest contacting Pablo Orduna if you want commit access -- he's
maintaining the repo.
I think that is supported but not sure. It may just be hard to scan once it
gets large. I dont think anyone is working on this.