How do I read barcode text?

[fperry]

Howdy,

I’m new to TWAIN programming. I am starting a C++ project to use a Fujitsu scanner (5750c) to scan documents that may contain a barcode. I would like to read the text of the barcode as I scan it.

There is a value TWEI_BARCODETEXT that looks like it is what I need but I can’t find anything on how to use it.

What is the format of the call? I’m using the twaintest program as a base for the code. Is the CallTwainProc the correct entry?

BOOL CTwain::CallTwainProc(pTW_IDENTITY pOrigin,pTW_IDENTITY
pDest, TW_UINT32 DG,TW_UINT16 DAT,
TW_UINT16 MSG, TW_MEMREF pData)

If so, what do I use for the DAT and MSG? I am guessing the pData is related to TW_MEMORY.

Thanks in advance.

[gabe]

the dat will be ExtImageInfo and the Msg will be Get.

I have a sample in vb.net if you’re interested (sorry no c++ samples yet) that runs thru an enum of all of the standard twei over at codeplex/opentwain the method name in the sample is GatherAllStandardExtImageInfo and it is in the file cTwain.vb

[fperry]

Thanks for pointing me to the code.

I will have to sort out how to convert the VB to C++ but that should be possible.

[nicky]

gabe wrote:

the dat will be ExtImageInfo and the Msg will be Get.

I have a sample in vb.net if you’re interested (sorry no c++ samples yet) that runs thru an enum of all of the standard twei over at codeplex/opentwain the method name in the sample is GatherAllStandardExtImageInfo and it is in the file cTwain.vb

as per you say you have a vb.net code for barcode recognisation, i m also working on the project which needs this code so, can you send me this code, it will be helpful to me…

below is my id :->

nicky_mk007@yahoo.co.in

[jimwatters]

The TWAIN2 Sample Application displays the ExtImageInfo including barcode strings from the scanner.

It will either retrieve all advertised ExtImageInfo or if the DS does not support ICAP_SUPPORTEDEXTIMAGEINFO it will attempt a small set of known types that includes TWEI_BARCODETEXT.

https://sourceforge.net/projects/twain-samples/files/TWAIN%202%20Sample%20Application/

Regards,
Jim Watters

**************************************************
JFL Peripheral Solutions Inc.
http://www.jflinc.com/
Your Expert Source of Custom Software and Services
for TWAIN Applications, Data Sources,
Peripheral Drivers and Support Software.
**************************************************

[marioclimn]

Hi, nicky. I find some sample codes for barcode recognition in VB.NET.
QR Code:Dim barcodes() As string = BarcodeScanner.Scan(“qr-code-barcode-image.gif”, BarcodeType.QRCode);
Code 39: Dim barcodes() As string = BarcodeScanner.Scan(“code-39-barcode-image.gif”, BarcodeType.Code39);

[cindy313]

@marioclimn wrote:

Hi, nicky. I find some sample codes for barcode recognition in VB.NET.
QR Code:Dim barcodes() As string = BarcodeScanner.Scan(“qr-code-barcode-image.gif”, BarcodeType.QRCode);
Code 39: Dim barcodes() As string = BarcodeScanner.Scan(“code-39-barcode-image.gif”, BarcodeType.Code39);

thanx for sharing!i’m also interested in whether it helps!

[matesew]

@cindy313 wrote:

@marioclimn wrote:

Hi, nicky. I find some sample codes for barcode recognition in VB.NET.
QR Code:Dim barcodes() As string = BarcodeScanner.Scan(“qr-code-barcode-image.gif”, BarcodeType.QRCode);
Code 39: Dim barcodes() As string = BarcodeScanner.Scan(“code-39-barcode-image.gif”, BarcodeType.Code39);

thanx for sharing!i’m also interested in whether it helps!

Have you tried the sample code? It seems that it does not work!!!

[jane313]

here,found on google,you may see the barcode reader code sample in vb.net of interleaved 2 of 5,and the code 128 barcode,just take it for example

[ericward]

Hey,jane313. Yes, you are right, I can find many barcode scanning SDKs for reading barcode text by googling, but none of them can work with twain programming project. So if you can some twain-compatible barcode reader, would you please give me some links? thanks in advance.

[peterlee]

@jane313 wrote:

here,found on google,you may see the barcode reader code sample in vb.net of interleaved 2 of 5,and the code 128 barcode,just take it for example

Hi, jane313.
The Twain Scanner is of great help to the barcode reading work. I am also testing about the related programs these days. We can have some communication later.

Best regards,
Arron

[sarahwhite0]

I am developing twain scanning application and interested in barcode scanner integration in asp.net.
Is it possible to do a barcode reading from the browser without sending the image to the server?

Thanks in advance
Sarah

[peterlee]

@sarahwhite0 wrote:

I am developing twain scanning application and interested in barcode scanner integration in asp.net.
Is it possible to do a barcode reading from the browser without sending the image to the server?

Thanks in advance
Sarah

Hi, sarahwhite0.
Yup indeed, I agree with you and I hope you success. Good luck.

Best regards,
Peter

[abbyleem3@yahoo.com]

@marioclimn wrote:

Hi, nicky. I find some sample codes for barcode recognition in VB.NET.
QR Code:Dim barcodes() As string = BarcodeScanner.Scan(“qr-code-barcode-image.gif”, BarcodeType.QRCode);
Code 39: Dim barcodes() As string = BarcodeScanner.Scan(“code-39-barcode-image.gif”, BarcodeType.Code39);

Hi, marioclimn
Thank you so much. 😀

[barcelomn]

@sarahwhite0 wrote:

I am developing twain scanning application and interested in barcode scanner integration in asp.net.
Is it possible to do a barcode reading from the browser without sending the image to the server?

Thanks in advance
Sarah

I believe this is the right solution for you.

[Author]

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