Barcode scanner, offline (no internet connection needed)

sensboston · Jan 27, 2011

Hi guys.

Who wanted a free barcode scanner? Here we are...

No network connection needed; app based on zxing library and Kevin Marshall's (from Clarity Consulting, can't remember his blog url now) code.

I just slightly modified the original code and added a few (probably useful but not sure

) services.

App interface is very simple: run application, focus on barcode, and wait until code is recognized. Touch handset screen to run recognition again.

Buttons description:
- "Save" saves captured barcode to jpeg;
- "Bing" and "Google" used for barcode web lookup (probably this part needs more work)
- "Mail" and "SMS" used for sending recognized code text.

Enjoy!

UPDATE 1: v 1.1, auto focus added;

UPDATE 2: v 1.2, orientation-less UI added, project moved to opensource at googlecode: http://code.google.com/p/barcodescan/

UPDATE 3: v 1.2.1, slightly changed autofocus logic, now works better on HTC. Download link: http://barcodescan.googlecode.com/files/BarcodeScanner.xap

UPDATE 4: v 1.2.2
- barcode search improved;
- added HTC detection, changes in autofocus logic;
http://barcodescan.googlecode.com/files/BarcodeScanner_1.2.2.xap

TechJunkiesCA · Jan 27, 2011

Is this a marketplace app?

davux · Jan 27, 2011

sensboston said:
Hi guys.

Who wanted a free barcode scanner? Here we are...

No network connection needed; app based on zxing library and Kevin Marshall's (from Clarity Consulting, can't remember his blog url now) code.

I just slightly modified the original code and added a few (probably useful but not sure ) services.

App interface is very simple: run application, focus on barcode, and wait until code is recognized. Touch handset screen to run recognition again.

Buttons description:
- "Save" saves captured barcode to jpeg;
- "Bing" and "Google" used for barcode web lookup (probably this part needs more work)
- "Mail" and "SMS" used for sending recognized code text.

Enjoy!

I can't seem to get it to do anything. It says 'Scanning...' and I'm trying different distances to codes, but nothing ever happens. Any pointers?

MixerNoMore · Jan 27, 2011

Is this limited to any country or is it just reading out what the barcode says?

sensboston · Jan 27, 2011

OK, lets go through step by step:
- it's not a marketplace app and have no chance to be published 'cause it uses undocumented camera API; you should download and unpack attachment and sideload the app;
- if you can't capture the barcode, try better lighting. Also, move a handset to autofocus camera. In my tests the scanner captured 100% of barcodes: from books, computer part boxes, foodstuff...
- it's not limited to US 'cause (I believe) the barcodes are international. And yes, it's just reads the barcode; however you may bing or google results, in the most cases search engines able to find product/book description or specifications.

It's a very basic scanner; if someone can recommend online API/service to parse barcode value, I can add it to the program (but I really do not want to spend much time for this)

malatesta · Jan 27, 2011

It technically works but the issue is lack of AF or Macro access.

On my Focus, it only works if I scan a barcode off of my PC (do an image search for one) --then it's super fast and quick.

Books, CDs, etc. do not work, regardless of lighting or distance--I suspect because the camera is not trying to AF. Any work around to that?

sensboston · Jan 27, 2011

I've tested first on HTC Surround - work perfect (I can prove). But you've right about Focus'es bad autofocus (LOL, sound nonsense - "Focus have no autofocus"!).

Will see what I can do... Any other suggestions or wishes (about barcode lookup, UI, etc.)?

P.S. Fixed (reload version from the first post), now working good on Samsung Focus.

malatesta · Jan 27, 2011

sensboston said:
I've tested first on HTC Surround - work perfect (I can prove). But you've right about Focus'es bad autofocus (LOL, sound nonsense - "Focus have no autofocus"!).

Will see what I can do... Any other suggestions or wishes (about barcode lookup, UI, etc.)?

P.S. Fixed (reload version from the first post), now working good on Samsung Focus.

Boom.

Working great on Focus now. Nice job. Think I'll try an LG next... bwahaha

As far as changes, no none right now. I'm sure what other apps use for barcode price comparisons--but perhaps a tie into Amazon or eBay would be good. Too bad you can't just jack into ShopSavvy's system with it, lol. If I think of any, will post back.

Edit: Working on LG Quantum too!

davux · Jan 27, 2011

sensboston said:
I've tested first on HTC Surround - work perfect (I can prove). But you've right about Focus'es bad autofocus (LOL, sound nonsense - "Focus have no autofocus"!).

Will see what I can do... Any other suggestions or wishes (about barcode lookup, UI, etc.)?

P.S. Fixed (reload version from the first post), now working good on Samsung Focus.

hmm, 1.0 wasn't upside down, but 1.1 is upside down on my Focus. Anyone else see this?

malatesta · Jan 27, 2011

davux said:
hmm, 1.0 wasn't upside down, but 1.1 is upside down on my Focus. Anyone else see this?

Nope. Fine on my Focus. It does work with accelerometer, you sure that isn't it?

sayonical · Jan 27, 2011

Works well on my HD7! Great job! Hopefully it will tie in with Amazon and save previous searches within the app etc

davux · Jan 27, 2011

sensboston said:
Hi guys.

Who wanted a free barcode scanner? Here we are...

No network connection needed; app based on zxing library and Kevin Marshall's (from Clarity Consulting, can't remember his blog url now) code.

Enjoy!

UPDATE: v 1.1, auto focus added;

Do you have any interest in releasing the source? I may have some time to improve upon this a bit, but I'd rather not start from scratch (or step on any toes re-creating virtually the same thing).

malatesta said:
Nope. Fine on my Focus. It does work with accelerometer, you sure that isn't it?

Good call, I was holding it strangely every time I opened it before. It works great.

sensboston · Jan 27, 2011

davux said:
Do you have any interest in releasing the source? I may have some time to improve upon this a bit, but I'd rather not start from scratch (or step on any toes re-creating virtually the same thing).

Why not?

I'm really do not have time for that project...

Here we are: http://code.google.com/p/barcodescan/

Send me a PM with your gmail and I'll add you to the project contributors. Do not forget comment each commit, increment solution version and promptly build community release (and upload xap to the project's download page!) - and you allset

BTW, there are many things to improve: better UI (completely orientation-less), additional functionality - commit found barcodes to database etc. etc. etc.

~~Tito~~ · Feb 12, 2011

Please review and follow these rules, it appears you aren't following them, you most likely aren't following the template. So fix it quick

. It is not a harsh criticism, it is just for consistency and better for the user. PM me for help or support!

If this post is here and your thread is closed, it means that you aren't following them and your intentions are for gain only.

~~Tito~~

nepalikhukuri · Feb 17, 2011

problem htc hd7

how do i copy this scanner programme to my htc hd7
i really hate this phone i had a htc touch pro 2 and it was far better can someone help me out here and also if some one can teach me how to customize personal ringtone would be great

ajhvdb · Mar 3, 2011

Thx for the code. Really usefull to learn from this

Sometimes when you scan a barcode and touch the screen to start again. After a few seconds it stops and shows the last barcode again.

It looks like the UI thread is catching up scanning some images. How to get rid of this?

sensboston · Mar 3, 2011

ajhvdb said:
It looks like the UI thread is catching up scanning some images. How to get rid of this?

Sorry, I don't have a time for that application now but it should be significantly refactored.If you want you may join the project and continue development, we can share some ideas for app improvement etc.

As for problem u described, you should play with the different capture resolutions or give some hardcoded "pause" to recognition library

Also, MS camera API (still not officially allowed) is not documented and very poor... However it's a great field for experiments and hacks

MiiiHaN · Mar 4, 2011

Thanks! That works great on my HD7.

~~Tito~~ · Mar 4, 2011

~~Tito~~ said:
Please review and follow these rules, it appears you aren't following them, you most likely aren't following the template. So fix it quick . It is not a harsh criticism, it is just for consistency and better for the user. PM me for help or support!

If this post is here and your thread is closed, it means that you aren't following them and your intentions are for gain only.

~~Tito~~

Please follow up on this!

ajhvdb · Mar 5, 2011

sensboston said:
Sorry, I don't have a time for that application now but it should be significantly refactored.

Im not that experienced in multiple threads. Do you think the problem is in the Zxing lib?

Looking at the code the Zxing lib should have a completed event from which you can restart or show the image.

This code works but is racing and racing in the UI thread and after finding a barcode and restarting it looks like something from a buffer is used..

Code:

private void GrabFrame()
		{
			Dispatcher.BeginInvoke(() =>
			{
				if (_Camera != null && CameraVisualizer.Visibility == Visibility.Visible)
				{
					WriteableBitmap wb = new WriteableBitmap(640, 480);

					_Camera.GetCurrentFrame(wb);

					wb.Invalidate();
					ScanBarcode(wb);
					wb.DisposeIfPossible();
				             GrabFrame();
				}
			});
		   
		}

Barcode scanner, offline (no internet connection needed)

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