BarcodeReader | blog post that reads bar code numbers | Form library

by ProductiveRage C# Version: Current License: MIT

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kandi X-RAY | BarcodeReader Summary

BarcodeReader is a C# library typically used in User Interface, Form, Deep Learning, Pytorch applications. BarcodeReader has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

C# code to accompany a blog post that reads bar code numbers from images without using any external libraries

Support

Quality

Security

License

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Support

BarcodeReader has a low active ecosystem.

It has 6 star(s) with 0 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of BarcodeReader is current.

Quality

BarcodeReader has no bugs reported.

Security

BarcodeReader has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

BarcodeReader is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

BarcodeReader releases are not available. You will need to build from source code and install.

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BarcodeReader Key Features

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BarcodeReader Examples and Code Snippets

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Community Discussions

Trending Discussions on BarcodeReader

How can i pass image itself not path of it to zxing library for decode pdf417

Instantiate based on 4 points

Can ZXing can read multiple barcode in the single image using C#?

Standard way to read barcode after upgrading ZXing.Net from 0.16.5 to 0.16.6

how to make barcode scanner check for barcode number from database?

OpenCvSharp with ZXing read barcodes with camera

How can I prevent my Android Location App from crashing on first time run?

Why is System.Windows.Forms.Timer stopping automatically when window is fulscreen or is large?

C# how to read a low quality barcode?

Android barcode scanner using excel as database

QUESTION

How can i pass image itself not path of it to zxing library for decode pdf417

Asked 2021-Apr-05 at 16:49

Code:

...

ANSWER

Answered 2021-Jan-19 at 11:49

You cannot. if you look at the source code you will see that what it does is call a java app with the provided path (Specifically com.google.zxing.client.j2se.CommandLineRunner).

If you need to pre-process your image then you will have to save it somewhere and pass the path to it to your library

Source https://stackoverflow.com/questions/65790791

QUESTION

Instantiate based on 4 points

Asked 2021-Apr-04 at 16:11

I'm zxing to estimate the 4 corner points of the QR Code. Following is my code to estimate the corner points.

...

ANSWER

Answered 2021-Apr-04 at 16:11

I don't know that QR reader you are using but generally you basically only need 3 points e.g.

Source https://stackoverflow.com/questions/66940859

QUESTION

Can ZXing can read multiple barcode in the single image using C#?

Asked 2021-Mar-26 at 20:02

I am trying to read multiple barcodes in a jpg image using the ZXing library. But it's returning only one barcode. I am not getting any source on how I can modify my code so that it read multiple barcodes. My code is:

...

ANSWER

Answered 2021-Mar-26 at 20:02

Try this one:

Source https://stackoverflow.com/questions/66814008

QUESTION

Standard way to read barcode after upgrading ZXing.Net from 0.16.5 to 0.16.6

Asked 2021-Feb-22 at 07:02

After upgrading ZXing.Net nuget package from 0.16.5 to 0.16.6 the existing source shows the error:

Using the generic type 'BarcodeReader' requires 1 type arguments

...

ANSWER

Answered 2021-Feb-17 at 23:29

If you get desperate and can't get the BarcodeReader which inherits from BarcodeReader to be referenced correctly, you could call the base constructor of BarcodeReader directly which is called when you create a new BarcodeReader:

Source https://stackoverflow.com/questions/66250042

QUESTION

how to make barcode scanner check for barcode number from database?

Asked 2021-Jan-14 at 20:07

Is there a way to make so the barcode scanner checks for the barcode number in my local database? I've been trying to do some searches on google but there is no tutorials for something like this.

...

ANSWER

Answered 2021-Jan-07 at 18:52

import codes from '../Data/codes';

class BarCodeReader extends Component {
  constructor(props) {
    super(props);
    this.camera = null;
    this.barcodeCodes = [];

    this.state = {
      camera: {
        type: RNCamera.Constants.Type.back,
        flashMode: RNCamera.Constants.FlashMode.auto,
      },
    };
  }
  
  validateCode(scanResult){
    const codeData = codes.find(codeMetadata => {
       return codeMetadata.id === scanResult.data 
    })
    
    if(codeData){
      alert("code valid" + codeData)
    } else {
      alert("code not found")
    }
  }

  onBarCodeRead(scanResult) {
    if (scanResult.data != null) {
      if (!this.barcodeCodes.includes(scanResult.data)) {
        this.barcodeCodes.push(scanResult);
        this.validateCode(scanResult)
      }
    }
    return;
  }

  render() {
    return (
      
         {
            this.camera = ref;
          }}}
          onBarCodeRead={this.onBarCodeRead.bind(this)}
        />
      
    );
  }
}

const codes = [
  {
    id: "code-id-text"
    name: 'text',
    company: 'text',
    extra: '7 310350 118670',
  },

Source https://stackoverflow.com/questions/65569708

QUESTION

OpenCvSharp with ZXing read barcodes with camera

Asked 2020-Sep-02 at 21:44

I'm having a problem with integrating Zxing libary with openCvSharp. I'm trying to read barcodes live with camera.

It throws an exception at the line Result result = barcodeReader.Decode(test); that gives;

...

ANSWER

Answered 2020-Sep-02 at 19:15

Depending on the .Net target platform you can use the bitmap directly with the method Decode. Only the .Net core/standard versions don't support the Bitmap classes directly.

Source https://stackoverflow.com/questions/63707116

QUESTION

How can I prevent my Android Location App from crashing on first time run?

Asked 2020-Jul-16 at 12:26

I have created an Android App which opens a Map Fragment and is to create 2 markers:

Marker 1 is the current location (which i believe may be the cause of the problem)

Marker 2 which gets the coords(LatLng) passed from a previous Activity

My problem is that when I run the app for the first time it crashes ... stops responding I have made sure all the permissions and manifest file is correct. But i have made the following observation : After the app crashes if i open Google Maps close everything and run the app again it works fine.

The following error message is generated:

2020-07-16 09:51:16.363 3833-3833/com.notbytes.barcodereader E/AndroidRuntime: FATAL EXCEPTION: main Process: com.notbytes.barcodereader, PID: 3833 java.lang.NullPointerException: Attempt to invoke virtual method 'double android.location.Location.getLatitude()' on a null object reference at com.notbytes.barcodereader.MainActivity2$4.onSuccess(MainActivity2.java:197) at com.notbytes.barcodereader.MainActivity2$4.onSuccess(MainActivity2.java:192) at com.google.android.gms.tasks.zzn.run(Unknown Source) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

Any help or assistance will be greatly appreciated.

TIA

...

ANSWER

Answered 2020-Jul-16 at 12:26

Sometimes the getLastLocation() method might return null, because the fused location provider doesn't update the location cache after the device is restarted. If getLastLocation() returns null unexpectedly:

Location is turned off in the device settings. The result could be null even if the last location was previously retrieved because disabling location also clears the cache.
The device never recorded its location, which could be the case of a new device or a device that has been restored to factory settings
Google Play services on the device has restarted, and there is no active Fused Location Provider client that has requested location after the services restarted. To avoid this situation you can create a new client and request location updates yourself. For more information, see Receive Location updates.

But in your case, I guess you have not added any check before getting latitude and longitude.

Below is a sample code of how to get and set location.

Source https://stackoverflow.com/questions/62930103

QUESTION

Why is System.Windows.Forms.Timer stopping automatically when window is fulscreen or is large?

Asked 2020-Jul-10 at 12:11

Following online samples, I have written qrcode web cam reader in c# uzing zXing and aForge libraries. I have encountered very weird behavior of System.Windows.Forms.Timerin C#: I have dropped it on widows form, enabled it, set interval 1 second and attached tick eventhandler.

Everything seems to work normally, but when i resize(enlarge) the window to particular size, or if i make window fullscreen, the times tick event stops firing. When i bring window from fullscreen to normal size, or when i reduce window size, the timer starts again by itself automatically.

I am using following version of visual studio:

Here is my code:

...

ANSWER

Answered 2020-Jul-10 at 12:11

After Extensive research, i Have replaced System.Windows.Forms.Timer with System.Timers.Timer And everything started to worked normally and errors went away.

My setup for System.Timers.Timer looks Like This:

Source https://stackoverflow.com/questions/62775363

QUESTION

C# how to read a low quality barcode?

Asked 2020-May-29 at 15:04

Goal:

I am aiming to read a bar code that has poor quality. Code works fine if the bar code is in it's highest quality.

Image:

Code:

To crop the barcode code:

...

ANSWER

Answered 2020-May-29 at 15:04

You are seeing too much subpixel data loss here for this barcode to be read with any software.

Barcodes work using the relative width of the bars - they are quite clever about how they do this and there is some room for tolerance, but only a small amount.

Here is your original barcode, a scaled up version and a readable version:

If you look at the farthest right bars on yours vs the readable barcode you can see that they are not equal sizes - they should be, but they are not.

The original image is only adequate if it has enough resolution to correctly capture the relative sizes of all bars.

You need to get better data from whatever your source is.

Edit:

Based on your comments, you say you are taking a print-screen of the bartender label - there's no reason you shouldn't be able to zoom to get a higher resolution print-screen, but if you can't then you can print the label to a file/image (such as a PDF) and use that.

It's also worth noting that BarTender has a .NET API that you can talk to directly if you need to, and that the data for BarTender can be exported as an Excel/CSV format (assuming you are using it as a driver for the barcode output).

You also mention that you want to check if a barcode is already in your database - you might be able to do this using the API instead.

I really can't tell you much more since I don't know what data you are generating labels from or if the labels are all ad-hoc; but I know that what you are trying to achieve is entirely possible if you zoom into the image enough to allow enough pixels for the individual barcode bars to render correctly relative to their full width - that's the important bit!

Source https://stackoverflow.com/questions/61958352

QUESTION

Android barcode scanner using excel as database

Asked 2020-May-14 at 20:26

I'm making a barcode scanner application(Using Barcode Scanner library and Google Vision) which is using an excel file as database and write into excel file. Excel database will look like this : "Product name" "Barcode". When someone using the barcode scanner and it scanned a Barcode and matching with database cell "Barcode" a custom dialog will pop up. In the custom dialog there is a Textview which will show the product name (Matched row) and here we can put a number and then save it. This save button will insert into an excel file all data("Product Name","Barcode","Quantity").

So my questions are : 1. How to read excel as database which we select? 2. How to pop up the custom dialog "onScan"? 3. How to insert these datas to the excel we created?

...

ANSWER

Answered 2020-May-13 at 21:56

For question 1 and 3 reading and writing excel files in Android can be achieved using Apache POI. I have seen most people struggle with finding right Jar but no need to download a jar separately simply use below mentioned dependencies.

Source https://stackoverflow.com/questions/61784946

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install BarcodeReader

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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