ZXing.BarcodeReader code not decode barcode

Question

This barcode:

Will not decode. What is wrong with that image that it will not decode.

string barcodePng = "tmp.png";
reader = new BarcodeReader();
reader.Options.PossibleFormats = new List<BarcodeFormat>();
reader.Options.PossibleFormats.Add(BarcodeFormat.CODE_39);
reader.Options.TryHarder = true;
using (var barcodeBitmap = new Bitmap(barcodePng))
{
    var result = reader.Decode(barcodeBitmap);
    if (result != null)
    {
        Console.WriteLine("barcode did not decode");
    }
}

This one is different from other thousands of other images that did decode in that I had to repair the original .tif file that it was cut from because it was damaged. I repaired it by converting it to .pdf and back to .tif.

I assume this is Code 39; compare your image to the [valid barcode](https://i.stack.imgur.com/u2qpV.png) for the same data. — GSerg, Oct 20 '18 at 20:11
I voted you up for providing an image of a valid one. I will try repairing image a different way that will not blur the image. — Be Kind To New Users, Oct 20 '18 at 20:16

score 1 · Accepted Answer · answered Oct 21 '18 at 06:55

1

What is wrong with that image that it will not decode.

It will not decode because some bars have merged and/or changed their widths due to low resolution and blurring.

Assuming the symbology is Code 39, the valid barcode looks like this:

answered Oct 21 '18 at 06:55

GSerg

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To fix the image I converted to .pdf with a different print option. I turned off the "sharpen" option on the print driver. – Be Kind To New Users Oct 21 '18 at 13:22

ZXing.BarcodeReader code not decode barcode

1 Answers1