Ar.js: Barcode Markers (May Be) Broken

[Miserlou]

Awesome project!

Hiro markers in my AR.js app (based on the a-frame example) are working fine.

However, I want to use 3x3 barcode markers!

I am following this example: http://jeromeetienne.github.io/slides/artoolkit-aframe/#20

The slideshow has this section:

<a-scene artoolkit='detectionMode: mono_matrix; sourceType: webcam;'>  
        <!-- here, put the content of your scene -->
</a-scene>

But changed mono_matrix to mono_and_matrix since mono_matrix does not exist.

Even after that, however, this does not appear to work:

<a-marker type='barcode' value='20' >
        <!-- here put your content -->
</a-marker>

Though the code runs in the browser without error, it is never able to identify the marker. This seems to be the case even when matrixCodeType is in 3x3, 4x4, 3x3_HAMMING63, etc..

Any ideas? It's possible this is related to an underlying bug: https://github.com/artoolkit/jsartoolkit5/issues/34

Can somebody sanity check this for me, please?

[Miserlou]

Similarly, there are no examples which use the 'barcode' format, which makes this more difficult to learn by example.

[IndianTinker]

Hi, I tried barcode markers. But i guess they are not working now. I used them in a class demonstrations to put a point forward regarding the amazing work and world of Web Reality.
https://github.com/rohit7gupta/rohit7gupta.github.io/tree/master/explore

I have opened an issue #53

[freinbichler]

Currently having the same issue, can't get the barcode markers to work.

[jeromeetienne]

ok i will look

[jeromeetienne]

everybody who experienced issue with barcode marker is using a-frame, correct ?

[freinbichler]

yes, thanks!

[IndianTinker]

yes ! a-frame. Thanks :)

[chisaipete]

I believe I'm facing a similar issue. Adding the matrixCodeType and detectionMode, but barcode markers aren't being detected at all.

[KollegeBratwurst]

I also face the problem with the barcodes. Something new on this one?

[jeromeetienne]

Sorry for the delay, i spent time on this today. And fixed an issue. I wrote an aframe example which handle multiple independant markers, and there is barcode is working there.

See the example here

You change the scene configuration to specific you are looking for matrix marker too and their type e.g.

<a-scene embedded artoolkit='sourceType: webcam; detectionMode: mono_and_matrix; matrixCodeType: 3x3;'>
</a-scene>

You define the marker like this

<a-marker type='barcode' value='5'>
     <a-box></a-box>
</a-marker>

[jeromeetienne]

Here is the image of the barcode marker 5 in 3x3 https://github.com/artoolkit/artoolkit5/blob/master/doc/patterns/Matrix%20code%203x3%20(72dpi)/5.png

[freinbichler]

I can confirm that this works! Thank you very much Jerome!

[KollegeBratwurst]

Thanks :)

[IndianTinker]

Super Dooper Thanks !! 💃

[vingkan]

Still not working for me, even when using the exact code from the example linked by @jeromeetienne .

There is also a strange effect where even when the hiro marker is not being used, the hiro marker shows the objects that were meant to be shown from the barcode.

Is it possible that the cause of this is that tracking backend is not being set to aruco?

[ZoltanVeres]

@vingkan Pleased create a new issue, if the issue still persists.

[reza21]

Hi everyone,, I am newbie in AR.js, I want to implement barcode for my project, but I don't know to generate barcode with type 3x3 or 4x4? Can anyone tell me where I can generate the barcode? thanks

[teasacura]

@reza21 Hey, I'm also a newbie, but in case you're still looking for barcode (3x3), artoolkit has some pre-generated numbers (0 to 63) here: https://github.com/artoolkit/artoolkit5/tree/master/doc/patterns/Matrix%20code%203x3%20(72dpi). I hope that helps!

[ppscvalentin]

I am using artoolkit to look for barcode 37 and I seem to find it (i'm inspecting arToolkitContext.arController.barcodeMarkers[37].inCurrent/.inPrevious and they're true), but the model doesn't show. The model does show when usign hiro.patt, however.

    arToolkitContext = new THREEx.ArToolkitContext({
      cameraParametersUrl: '/assets/cameras/camera_para.dat',
      detectionMode: 'mono_and_matrix',
      matrixCodeType: '3x3',
      debug: true
    });
    ...
    let markerControls1 = new THREEx.ArMarkerControls(arToolkitContext, markerRoot1, {
      type: 'barcode', 
      barcodeValue: "37",
    });

Could someone please help?