.NET Barcode Reader Help - Demo program works but my standalone does not - .NET Barcode Reader Help - Demo program works but my standalone does not

I am trying to write a clean standalone barcode reader application based off the C# Barcode Demo application (BarcodeMainDemo)

When I load my sample image into the BarcodeMainDemo application and limit BarcodeSymbologies to BarcodeSymbology.Code3Of9, it works.

However, when I try the same thing in my standalone application it fails to find any barcodes. The code compiles and runs, it just doesn't find any barcodes.

My complete code is below. Any help is appreciated
(Note: I set the bounds to (0,0,0,0) after I noticed via debugging that was the value in the BarcodeMainDemo )

namespace StandaloneBarcodeDemo
{
public partial class Form1 : Form
{

private BarcodeEngine _barcodeEngine;
private BarcodeSymbology[] _symbologies = new BarcodeSymbology[1];
private RasterImage _rasterImage;
private RasterCodecs codecs;
private LeadRect _bounds;

public Form1()
{
InitializeComponent();

string developerLicenseFilePath = @"C:\LEADTOOLS21\Support\Common\License\LEADTOOLS.LIC";
string contentsOfDeveloperKeyFile = System.IO.File.ReadAllText(@"C:\LEADTOOLS21\Support\Common\License\LEADTOOLS.LIC.KEY");
if (developerLicenseFilePath != string.Empty && contentsOfDeveloperKeyFile != string.Empty)
RasterSupport.SetLicense(developerLicenseFilePath, contentsOfDeveloperKeyFile);

}

private void cmdProcess_Click(object sender, EventArgs e)
{
int pageCount = 0;
if (txtSourceImage.Text != "")
{
//initialize codecs engine
codecs = new RasterCodecs();
codecs.Options.Load.AllPages = true;

try
{
//load the image
_rasterImage = codecs.Load(txtSourceImage.Text);

//get the page count
pageCount = _rasterImage.PageCount;

//look for only 3of9 Barcodes
//_symbologies = new BarcodeSymbology[1];
_symbologies[0] = BarcodeSymbology.Code3Of9;

//set bounds
//_bounds = new LeadRect(0, 0, _rasterImage.Width, _rasterImage.Height);
_bounds = new LeadRect(0, 0, 0, 0);

//setup the engine
_barcodeEngine = new BarcodeEngine();

// Ignore errors in case there are corrupted ones on the image.
_barcodeEngine.Reader.ErrorMode = BarcodeReaderErrorMode.IgnoreAll;

//start at the first page
_rasterImage.Page = 1;

BarcodeData[] barcodes = _barcodeEngine.Reader.ReadBarcodes(_rasterImage, _bounds, 0, _symbologies);
//_barcodeEngine.Reader.ReadBarcodes(_rasterImage, _bounds, 0, _symbologies, null);

//add barcodes to listbox
foreach (BarcodeData barcode in barcodes)
{
lstBarcodeValues.Items.Add(barcode.Value.ToString());
}
}
catch (Exception ex)
{
MessageBox.Show("Unexpected error:" + ex.Message + ":" + ex.InnerException);
}
}
}
}
}

Note the LEADTOOLS Barcode Demo makes some modifications to the RasterCodecs object to load the input file at a higher resolution than the default.
https://www.leadtools.co...s-rasterizedocument.html

Could you modify your code to include this as well?



Depending on the format you're working with, this may resolve the issue. If the issue persists, I may need to examine the file you're working with locally.

I added the two lines above but it doesn't make a difference. IN fact I set a breakpoint after the codecs.Load() line to examine the rasterimages object and both the XRESOLUTION and YRESOLUTION are both at 200, despite the codecs.Options.RasterizeDocument.Load.Resolution settings.

Updated code snippet below

(Note I changed from .codecs.Load(txtSourceImage.Text) to codecs.Load(txtSourceImage.Text, 0, CodecsLoadByteOrder.BgrOrGray, 1, info.TotalPages) based on the code I saw in the demo)

codecs = new RasterCodecs();
codecs.Options.RasterizeDocument.Load.XResolution = 300;
codecs.Options.RasterizeDocument.Load.YResolution = 300;
codecs.Options.Load.AllPages = true;

try
{
//load the image
//_rasterImage = codecs.Load(txtSourceImage.Text);
CodecsImageInfo info = codecs.GetInformation(txtSourceImage.Text, true);
//_rasterImage = codecs.Load(txtSourceImage.Text);
_rasterImage = codecs.Load(txtSourceImage.Text, 0, CodecsLoadByteOrder.BgrOrGray, 1, info.TotalPages);

//Note the X and Y resolution still comes up as 200 DPI despite the lines above

Could you upload your image so I can examine it in conjunction with your code? I've sent you upload instructions via email.

Sorry, I had to step away for an appointment. I just uploaded the image and a zipped up version of the project.

I should also note that I tried using the sample barcode images from the DEMO Barcode project (C:\LEADTOOLS21\Resources\Images) in my project and those barcodes do not get detected either.

Nick,

One more update. I added some code to the LeadTools BarCodeMainDemo.

In the DoReadBarcodes() function, I added the following code prior to the for loop. Basically it's a messagebox which will prompt the user to load an alternate image to have it's barcode read (Not this image is NOT displayed in the viewer). Interestingly enough, when using this approach, the barcode from the C:\\Temp\\15289_00001AZZZ_P001.TIF does get read, which makes me think there must be some setting on the _barcodeReader object itself that I am missing in my standalone program.

Let me know your thoughts while I keep investigating.

if ( MessageBox.Show("Forcibly load test image","Barcode Test", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
RasterCodecs codecs = new RasterCodecs();
string srcLocation = "C:\\Temp\\15289_00001AZZZ_P001.TIF";
CodecsImageInfo info = codecs.GetInformation(srcLocation, true);
//_rasterImage = codecs.Load(txtSourceImage.Text);
_rasterImage = codecs.Load(srcLocation, 0, CodecsLoadByteOrder.BgrOrGray, 1, info.TotalPages);
}

I've examined the sample project as well as the image you submitted. This appears to stem from a missing DLL. The Leadtools.Barcode.OneD.dll library is necessary for reading and writing linear barcodes.
https://www.leadtools.co.../to/barcode-support.html

This library is loaded automatically by reflection if it's in the same folder. This means it isn't necessary to explicitly reference it in your application, but doing so typically copies it to the output folder.

Thanks Nick, I'll try it out and let you know

Nick, thanks for the help. I tried a few barcodes and they all work.

I'll make a note of the Leadtools.Barcode.OneD.dll for my future projects.