IMAQ Read Barcode.vi

Does anyone have documents or information on the algorithms used from IMAQ REad BArcode.vi?
I need to write a report about my project and I dont know how the VI decode the barcode.
Is there anyway I can find out?
Best regards,
Krispiekream

Hi krispiekream,
I can't tell you specifics, but you can expect with any 1D barcode that it's doing edge detection across it and measuring the distances. The distances and thickness of lines specify characters. I'd recommend a search through Wikipedia as to the different barcode types listed in the help for that VI.
Jeff | LabVIEW Software Engineer

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Comment fonctionne imaq read barcode

I use Imaq read EAN13 and i will know how to function this VI.

For information on this function you may want to check the example program shipped with LabVIEW and IMAQ Vision. You can find it in this directory:
C:\Program Files\National Instruments\LabVIEW 6.1\examples\Vision\3. Applications\Barcode Example.vi
Also you may want to drop the Barcode Reader VI into the block diagram and right-click over it, select Help. If this does not clarifies the question you might have please post the details of it.
Good luck!
Nestor.
Nestor
National Instruments

Read barcode scan without textbox focus

I have 16+ scanners coming into the computer from a single USB port. The code that I have now works fine as long as the textbox has focus. What I want is some code that I could use that would get the scan even if the windows form is minimized
or some other program is being used.
I've looked around a lot and everything just says to have focus on the textbox. Is there like a barcode listener that I could use?

Hi saprest,
When you have focus in a testbox, it sends characters to the textbox as if you typed them from the keyboard. If you don’t want to use a testbox, you would subscribe to a keyboard event handler to capture the barcode stream.
The links below might be useful to you:
# get barcode reader value form background monitoring
http://stackoverflow.com/questions/10850050/get-barcode-reader-value-form-background-monitoring
# How can I read barcodes without having the user focus a text box first?
http://stackoverflow.com/questions/2688493/how-can-i-read-barcodes-without-having-the-user-focus-a-text-box-first
If you have any further questions, please feel free to post in this forum.
Best Regards,
Edward
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IMAQ Read File error -1074396159

Hi NI,
I am getting "IMAQ Read File" error -1074396159 when trying to read a large image. I get this error when trying to read a ~400MB image on a very clean (not many extraneous applications) Windows 7 computer with 4GB or RAM. I tried this on two other not very clean Windows 7 computers with 4GB of RAM and 2GB of RAM respectively. On the latter two computers I do not get this error. I found this knowledgebase which explains one possible cause of this error. Are there any other causes for this error? Are there any workarounds?
Thanks,
Jonathan-LV

That KB is incorrect, as the memory only needs to be virtually contiguous inside the process address space, not physically contiguous in RAM. This is not affected by how many programs are loaded (with the very slight exception that some read-only pages of DLLs can be shared cross-process in certain cases). This is really a function of how fragmented the memory space is in the process itself. The problem is that a normal 32-bit app on 32-bit Windows only has 2GB of virtual memory space. 500MB is 25% of the entire space. DLLs tend to get loaded scattered throughout the memory space for various reasons and other memory allocations that have different lifetimes cause fragmentation. The number of multi-hundred-MB chunks available is very small in a large app like LabVIEW.
Some options to help:
-Moving to a 64-bit OS (still using 32-bit LabVIEW) will change that 2GB address space to 4GB with no changes to your app
-Moving to both a 64-bit OS plus 64-bit LabVIEW will change that 4GB address space to 8TB (virtually unlimited)
Eric

Is it possible to read Barcode using Blackberry Application?

Dear Friends,
Is it possible to read Barcode using Blackbbery application? If yes please let me know what thing we'll be require to develop the same. It is very urgent please help me.
Regards,
Haidar Ali

Yes, it is. There are already a number of barcode reader applications for BlackBerry, such as one named "Edocrab". Google it.
You'll need some experience in Java development. Please see the Developer section of this forum.
And here:
http://na.blackberry.com/eng/developers/
1. If any post helps you please click the below the post(s) that helped you.
2. Please resolve your thread by marking the post "Solution?" which solved it for you!
3. Install free BlackBerry Protect today for backups of contacts and data.
4. Guide to Unlocking your BlackBerry & Unlock Codes
Join our BBM Channels (Beta)
BlackBerry Support Forums Channel
PIN: C0001B7B4 Display/Scan Bar Code
Knowledge Base Updates
PIN: C0005A9AA Display/Scan Bar Code

Read barcode from pdf

Hi all,
Please can any one tell me how to read barcode from pdf in java. This will be very help full for me.
Thanks,
Avinash

Avinash_loves_JAVA wrote:
Please can any one tell me how to read barcode from pdf in java. This will be very help full for me.JMF doesn't support PDFs or barcode reading.
If you need further assistance with this issue, you'll need to repost in a generic Java forum, or perhaps do a google search for a barcode-reading library.

IMAQ Read File Inconsistency

Dear LabViewers,
I have a problem reading Tiff-Files using IMAQ Read File (Version 6.05):
Opening a 16-bit-grayscale picture taken from a microscopy program (FluoVIEW) the image does not look like it has to be - the whole color table seems to be shifted. Now I open another 16-bit-grayscale picture I took some weeks before the the same program (and before I updated that program) and everything looks o.k. - Nevertheless: Opening now my first image again the color representation is also o.k. The question is: What do I change with the IMAQ Read File settings when I open a Tiff picture ? Why is this effect resident because after calling "IMAQ Dispose" the color representation stays in its wanted (correct ?) form. Even if I close the VI and resta
rt it again everything is satisfying when you once loaded the image with the color table you wanted...
Thank you very much for any help in advance !

Mino. Does the behavior persists if you open the images in LabVIEW and then resave them as tiff files? I ask because tiff files have no formal standards, so if they're saved in another program, they could open inconsistantly in LabVIEW. Of course, another option is to use some other image format like bmp or jpg.

ADF Mobile: Reading barcodes from camera

Hi everyone,
We are planning to develop an ADF Mobile application. One of our client requirements is that they can use Mobile camera to read barcodes from their products. We have tried to use Zxing for barcode recognizion but we get a poor level of successful recognizion
Is there any way to read barcodes from photos (any kind of plugin or recommended library) that we can use in combination with ADF Mobile to get this feature? Has anyone worked with any other library that can recommend us to use for achieve a better successful level?
Thanks in advance for your help,
Carles Biosca
Avanttic
(blog.avanttic.com)

Hi, thanks for your comments, but what would be the possible solution for developers who want to read barcodes using adf mobile 11.1.2.3 ? or when would be the next release date of adf mobile?
I´ve tried to launch zxing via url (barcode app should be installed previously) as you can see in https://code.google.com/p/zxing/wiki/ScanningFromWebPages, but i fail getting the scan code.
So i do not know if my try could be a solution or adf mobile definitively do not let to read barcodes.
thanks for your attention.
Yershom

IMAQ Read Meter indicates result incorrectly. Why?

Hi,
I'm using the Meter example.VI to test the Machine Vision functions. I save this example as another name and change the instrument to my manometer.
I have marked the initial and final position of the manometer and executed the example. But, in some cases, the IMAQ Read Meter function indicates a different value from the position of the needle in the picture. Why this is happening?
I attached a picture which the red circle indicates the value calculated by the IMAQ Read Meter function. I saw this happens in the original Meter Example.VI too.
Thanks,
R. Feldmann
Solved!
Go to Solution.
Attachments:
manometer1.png ‏302 KB

Your manometer dial is very cluttered. There are lots of other things inside the dial area. When the function is searching for the needle, it is probably finding the other stuff instead.
For this dial, you would need to write a much more robust version of Read Meter for it to work properly. I would probably search for the needle at several different radii and compare the locations. Only the true needle will be in all the radii.
Another possibility is to subtract the background image. Take pictures with the needle in two different places and use Min to combine the images and eliminate the needle. You can then subtract this image from the live image, and the needle should be the only object visible. It will disappear slightly when it passes over other white object, but you should still be able to find it.
Bruce
Bruce Ammons
Ammons Engineering

Slow response when reading barcode in RFID

Hi All.
We're facing trouble when scanning barcode in some RFID transactions. When reading barcode for example, Material number is written very slow, it takes aproximately 2 seconds to write each character, so, for a string for 15 characters it takes more less 30 seconds to write the full code scanned.
We're using terminal cm9090-g, Windows Mobile 5 release 1.35 and running SAP ECC 6.0.
If you need any further information, please let me know.
Please advice.

No, phones do not have upgradeable RAM. Actually, IMO that was the mis-engineered fault of the N97, for all its capabilities, its hampered by too little RAM for too many applications. It would take quite a little knowledge of the quirks of Symbian to get it to run smoothly.
For example, choosing the right combination of widgets. Obviously if your widgets comprise of two shorcut bars, music player, calendar and contacts, this would use very little RAM, compared to a combination of contacts (withh RSS), Accuweather, Facebook, Email and Shortcuts.would eat up more RAM since Facebook and Accuweather and the Email would always be running.
When you get the app called KillMe, kill certain tasks which you do not use. For example, do you use handwriting recognition? No? Then Kill peninputmanager. What about Voice Commands? Kill Voice Command Manager. Things like that could ease up on your RAM. Also, dont worry about accidentally Killing something, since under the "A" tab, which is the one where the safe to Kill operations are, that's where you do your killing. Also the apps you killed will work again once you restart the phone.
If you find my post helpful please click the green star on the left under the avatar. Thanks.

Re: ADF Mobile: Reading barcodes from camera

Hi there!
Could you describe please, how do you integrate zxing in adf mobile? I think to open the camera using DeviceFeatures DataControl and then try to decode the image captured previously with Java but i do not get loading zxing classes in my android emulator device.
Regards.

Hi, thanks for your comments, but what would be the possible solution for developers who want to read barcodes using adf mobile 11.1.2.3 ? or when would be the next release date of adf mobile?
I´ve tried to launch zxing via url (barcode app should be installed previously) as you can see in https://code.google.com/p/zxing/wiki/ScanningFromWebPages, but i fail getting the scan code.
So i do not know if my try could be a solution or adf mobile definitively do not let to read barcodes.
thanks for your attention.
Yershom

How to read barcode?

Hi,
In my application, we have a requirement of reading barcodes and generating barcodes for shipping lables. Do you have any idea about how to do this in a web application?
Thanks in advance
Regards,
Challa.

Hi rayudu,
We have a custom transaction in SAP to read a barcode tag, but we don´t have any configuration or code to get it. The software of reader makes all work.
You only have to configurate the reading device to simulate the entry of data in SAP, and then execute the wished process.
regards,
Alejandro.

IMAQ Read Meter

Hello ;
I would like to know about function " IMAQ Read Meter" that what theory for calculate ? ex; Hough transfrom, etc.
Because I'm studying this function .So I want to make sure it.
Thank you and Best regards,
Jay
Attachments:
Untitled1.png ‏14 KB

Jay,
The vision concepts manual has some information on how the family of read meter VIs work but a more detailed explanation isn't publicly available, just because it is considered intellectual property and so the actual algorithms that those functions are based on aren't highly publicised.
http://www.ni.com/pdf/manuals/322916b.pdf
Rob B
FlexRIO Product Manager

How to read 'Barcode' in Adobe PDF Forms?

Hi Everybody,
I have a scanned pdf of 20 pages. There is a barcode in every page in a serial order like in first page it is 545001 in second page it is 545002 and in third page it is 545003 and so on. I want to automate a process sothat i can know that all the barcodes are in serial order or not. Or, I could know whether it is tempered or not.
Please tell me. How i can do this using Adobe Acrobat or Adobe LiveCycle?
Is there any features in acrobat or livecycle?
Thanks,
Manjeet

It is an offline form.
We are consuming the web service in Form to create a PR.
However we also need the user to attach some documents before it actually clicks on the "Create PR" button.
User can attach the file through "Attachments" facility provided on Adobe Reader.
Our problem is how to check whether user has attached the documents or not. If the documents are attcahed then how to read them using JavaScript?
Thanks,
Taha

Read BARCODE in PDF file

Hi! I've a requirement to read some barcodes inside PDF files. I actually can read from images, but can't find how to read them from a PDF. Someone has done this? Or maybe some suggestions to convert PDF to image, in that way I can read the code from the generated imaged?
Best regards!

I believe the iText library lets you read PDFs in Java. You can google it. Or for that matter, google java pdf library.
Once you know how to extract the barcode image from the PDF, it will be the same steps you use to read the image normally. If it's stored as something other than an image, that should be documented in the library's docs.

IMAQ Read Barcode.vi

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