Archive of "GetStarted" comments

[srowen]

Likewise I am archiving old "GetStarted" wiki comments in this thread.

Comment by scastillop, Nov 23, 2007

Hi,

I have tried to use the software, but something is worng. When I make
a photo, I get the error:

"could not locate and decode a barcode in the image".

I have tested with several barcodes, several distances and sizes, but
always get the same error.

Can someone help me, please ???
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Comment by alexandr...@rfidcenter.ch, Nov 23, 2007

Hello,

I got the same problem with my Sony Ericsson k800i. I tried to read
EAN13, Datamatrix and QRCodes and received the same message any time
even when the quality of the picture was excellent.

Thanks for any comment.

Bye

Alex
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Comment by srowen, Nov 23, 2007

Which phone? is there a picture of the QR Codes that you can post? Is
the phone auto-focusing, and are you able to get a clear, focused
shot? I am puzzled because any phone which manages to run this ought
to work reasonably well, since it requires auto-focus. Maybe there is
a bug on particular types of patterns.
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Comment by anton.fagerberg, Dec 03, 2007

I'm getting the same error. I use a Sony Ericsson t650i and it does
auto-focus and the picture looks sharp before i click and get the
error.
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Comment by anton.fagerberg, Dec 03, 2007

Also, sometimes I get a error. Somthing like "java.lang exception".
Maby that has something to do with it?
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Comment by srowen, Dec 03, 2007

The error above just means it could not see the barcode. If you have
auto-focus, it should be pretty robust -- try again? does it always
happen? any chance you can point me to the code you are trying to
decode? maybe there is a bug.

Anything like an Exception is a bug. I bet there is no additional
information though, is there, like a stack trace. Hmm, that's hard to
track down. I hope additional unit tests that I am adding will uncover
possible bugs.
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Comment by anton.fagerberg, Dec 06, 2007

Ok, I have run some experiments now. I've tried several QR-codes but
today when I did the experiments I used this one from Wikipedia .

So it goes like this:

- When I do something wrong with purpose like taking a picture
that doesn't contain the whole QR-code I get the "could not locate and
decode a barcode in the image"-error. - When I do take a good picture
with auto-focus and it looks very sharp until the screen goes black
and the photo snaps i get the error saying
"Java.Lang.ClassnotfoundException?".

I have installed it using this link: http://zxing.org/w/ZXingReader.jad
directly to my phone.
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Comment by srowen, Dec 06, 2007

Thank you, this is helping track down the issue. I think there is a
problem in the obfuscation step. I will fix it and continue some more
tests.
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Comment by srowen, Dec 06, 2007

Could I ask you to download and try again? I believe I fixed the
exception. I can decode that with the regular version; with the basic
version it is indeed quite hard even at that size.
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Comment by anton.fagerberg, Dec 07, 2007

1st try: "Failed to take snap shot". 2nd try: "Couldn't decode blah
blah" 3rd try: Worked! 4th try: Worked again!

It seems like you fixed it! Great job :)
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Comment by anton.fagerberg, Dec 07, 2007

I have tried alot of different QR-codes now and they all work
perfectly! Even really BIG ones. Good stuff!
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Comment by mfdavid, Dec 18, 2007

Wow! Amazing! Great job! Thanks for sharing (too bad it´s not GPL, but
it´s good anyway!) :) Keep the great work!
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Comment by srowen, Dec 18, 2007

Thanks much -- may I ask which phone it worked on? GPL would be more
restrictive to end users, and while it has some positive effects (more
OSS) our general policy is to go with an Apache-like license to
maximize your ability to use this code.
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Comment by brainnolo, Dec 23, 2007

Great, although I couldn't get it to work on my Nokia 6630 (won't run,
not even basic) I will keep an eye on the project as I need it for an
university project (currently using a gpl and quite slow library)
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Comment by tonsofpcs, Dec 26, 2007

When attempting to run on Samsung A707 (AT&T, sold as "Cingular
Sync"), it appears to attempt to load and then fail and returns to
where I was when the application was started (either web menu or
application menu) as if it loaded, ran, and terminated.
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Comment by bastienauneau, Dec 27, 2007

Hi, I downloaded with the phone the reader and It cannot read anything
(could not locate code...). I tried on big ones, very clear ones, well
focused, but still nothing... Any ideas why ? bastien
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Comment by srowen, Dec 30, 2007

Samsung A707 -- looks like it is CLDC 1.0 only so it won't run any of
this, sorry. Nokia 6630 -- not sure, the basic version ought to run. I
am not sure if I have one of those to test on.

Can't decode -- are you using the basic version? it's hard to decode
that way. What kinds of codes were you scanning?
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Comment by Hossin.Kashani, Dec 30, 2007

The basic reader version loads and runs on Nokia 6630 but fails to
decode. It only decoded once in 100 scans . Regular version installs
but failes to run at all. I want to know the difference between the
two vesions.
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Comment by srowen, Dec 30, 2007

The "basic" version works on devices without an auto-focus camera
(well, ones that don't allow control over it via JSR-234). Try taking
captures from a distance with this version. If you are too close,
without the right focus, decoding is hard.

You can try the Kaywa reader too for now on the Nokia 6300. I think it
does a better job on devices without auto-focus.
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Comment by brainnolo, Jan 07, 2008

I've got a Nokia 6630 which I only use for testing things, if you have
some debug build i'll be glad to help you fixing the problem. I'm
using trying to use basic version but it simply won't start.
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Comment by f.dewisme, Jan 08, 2008

Hei Guys, just tested the new release on Nokia navigator 6110. We
tried first to scan a codes displaid on a screen. Couldn't make it
work. Then we tried to scan codes printed on paper. We have tried 4.3
cm*4.3cm; 3.2 cm*3.2cm and 2.6cm*2.6cm. It worked on all three sizes.
It is not 100% bulletproof. Needs a couple of trials. But defintly
fare enough. It's worth it and it will be for sure be improved in the
future. Thank you and keep up the good work.
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Comment by srowen, Jan 08, 2008

That's good that it basically worked. I have been able to decode off a
computer screen -- well, and LCD screen. I am not sure whether a CRT
might present odd problems with scan rate. With auto-focus/macro you
should be able to decode (simple) QR Codes at even, say, 1.3cm x 1.3cm
-- yes, for more complex codes a little bigger is better. There is
room for improvement for sure.