Retrieve qrcode vertices | Voxel Busters | Page 1

potent obsidian Oct 17, 2024, 4:35 PM

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Hi,

I'm trying to implement Barcode scanner for qrcode following the example listed in the tutorial: https://assetstore.easymlkit.voxelbusters.com/tutorials/features/barcode-scanner

I see that it is possible to access the BoundingBox (Rect) of the scanned qrcode which is axis aligned.

how can I get the 4 vertices of the qrcode instead, considering it may not be straight to the camera?

leaden solstice Oct 19, 2024, 12:15 AM

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Do you expect this in screen space?

leaden solstice Oct 19, 2024, 12:32 AM

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Well, the corner points are not currently offered in the api.
However, the code for it exist but I assume its in image space.

potent obsidian Oct 19, 2024, 7:57 AM

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Just to be clear, if have an image frame like this, using the example mentioned above I obtain the boundingbox (in red), while what I need are the corner points of the qrcode (in green)

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So in image space would be ok and then I could do my own transformation. Which api should I use to retrieve them?

leaden solstice Oct 22, 2024, 10:33 PM

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Its currently not part of the api

potent obsidian Oct 23, 2024, 7:23 AM

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Any plan to add this feature?

leaden solstice Oct 23, 2024, 7:25 AM

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Yes, but need some time. May I know your deadlines?

potent obsidian Oct 23, 2024, 7:30 AM

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Well, basically I need it asap 🙂 This the reason I asked about your plan. Just to understand if I could wait or look for an alternative solution

leaden solstice Oct 23, 2024, 7:31 AM

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Oh 😐
I'm currently busy with a tight schedule for a plugin release 😐

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May I know what platform is your current focus?

potent obsidian Oct 23, 2024, 8:04 AM

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Yes. Hopefully I need to target both Android and iOS at same time (just in case, android could go first, but quickly followed by iOS).
Eventually let's consider the worst scenario, so after you plugin release (I imagine you refer to the essential-kit for the 1st november) . When will you be able to deliver this update?

leaden solstice Oct 23, 2024, 8:39 AM

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potent obsidian Yes. Hopefully I need to target both Android and iOS at same time (just in case,...

If I get a chance in couple of days, I try to push the change - its a minor one tbh.

This is because, you may have some work to do regarding the space conversion(in which I may not be able to look into currently). This way you have enough time to try it - at the same time i can continue with my release 🫣

potent obsidian Oct 23, 2024, 9:03 AM

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Ok. Let's try this way. Thank you

leaden solstice Oct 24, 2024, 3:48 AM

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I sent you a dm. Just import the package on the existing one and you should see GetCornerPoints in the Barcode.

Haven't done for iOS yet as it has some extra setup needed but for now you can continue with android and test it.

potent obsidian Oct 24, 2024, 10:24 AM

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Got it, thanks! I'll test it next days and let you know

potent obsidian Oct 26, 2024, 2:44 PM

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Patch imported and I confirm I can see Barcode.CornerPoints property 👍

leaden solstice Oct 26, 2024, 2:46 PM

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Thanks for confirming. I need some time to get the equivalent ios part.

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Did you check the values and are they expected?

potent obsidian Oct 26, 2024, 2:55 PM

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The points seems correct related to a texture I use as ImageInputSource. It seems to always return 4 corner starting from the bottom left in counterclockwise order (despite I didn't find any specs on official Google ML Kit documentation). Anyhow I'm doing further tests. Eventually I let you know

potent obsidian Nov 20, 2024, 12:58 PM

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Hi there, any chance to have also iOS api and possibly an official release of Easy ML Kit with these features? 🙂 (Switching development branches is almost annoying by the fact I've to handle patched version manually 😆 , but also for build automation)

leaden solstice Nov 21, 2024, 3:35 AM

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potent obsidian Hi there, any chance to have also iOS api and possibly an official release of Ea...

Hi,
Is it fine if I get you by mid of next week?

potent obsidian Nov 21, 2024, 9:16 PM

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Yes, thank you 🙏

potent obsidian Dec 4, 2024, 9:52 AM

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Any news? 🙂

leaden solstice Dec 4, 2024, 10:25 AM

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Ouch! Sorry!

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I will plan this week.

potent obsidian Dec 4, 2024, 10:43 AM

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ok thanks

leaden solstice Dec 9, 2024, 3:35 AM

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@potent obsidian
I will get both of your concerns resolved (the one with crash and vertices access). I'm on it.

leaden solstice Dec 17, 2024, 7:17 AM

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Version 3.2.1 was submitted to store and it offers CornerVertices on both platforms.

potent obsidian Dec 18, 2024, 10:24 AM

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ok. I'll check it out

potent obsidian Feb 6, 2025, 4:08 PM

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Hi @leaden solstice after doing some in-depth testing on iOS implementation, it seems to have two differences from Android implementation:

Barcodes list is null in case if no qrcode is found (instead Android return empty list. Not a big issue, just for reporting it)
QRcode vertices are not correct.

Here follow an implementation example to show of the two issue.

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void Update()
{
    if (_isScanInProgress) return;
    _isScanInProgress = true;

    Debug.Log("FDF Scan: " + _scanCounter++);

    var image = new ImageInputSource(_texture); //Simulating a new texture per scan

    _scanner.Prepare(image, _scannerOptions, (scanner, error) => 
    {
        if (error != null)
        {
            Debug.LogError("FDF Prepare failed: " + error.Description);
            _isScanInProgress = false;
            return;
        }
      
        scanner.Process((scanner, result) =>
        {
            if (result.HasError())
            {
                Debug.LogError(result.Error.Description);
                _isScanInProgress = false;
                return;
            }
            
            if (result.Barcodes != null) {
            
                foreach (Barcode each in result.Barcodes)
                {
                    Debug.Log(string.Format("QRCode Info: Format: {0}, Value Type : {1}, Raw Value : {2}, Bounding Box : {3}", each.Format, each.ValueType, each.RawValue, each.BoundingBox));

                    var bl = each.CornerPoints[0];
                    var br = each.CornerPoints[1];
                    var tr = each.CornerPoints[2];
                    var tl = each.CornerPoints[3];
                    Debug.Log(string.Format("QRCode Points: BL: {0}, BR: {1}, TR: {2}, TL: {3}", bl, br, tr, tl));
                }            
            }
           _isScanInProgress = false;
           scanner.Close(null);
        });
    });
}

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And the Log related to the scanned QRCode:

QRCode Info: Format: QR_CODE, Value Type : URL, Raw Value : https://www.google.com, Bounding Box : (x:60.00, y:108.00, width:230.00, height:227.00)
QRcode Points: BL: (0.00, 3.22), BR: (0.00, 3.78), TR: (0.00, 3.77), TL: (0.00, 3.30)

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As you can see, in the points the X value is always 0.00, and also Y even if valorized has questionable value

potent obsidian Feb 26, 2025, 10:55 AM

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@leaden solstice just recalling your attention on this thread as a few time is passed 🙂 ! Do you have any feedback on this behaviour?

leaden solstice Mar 6, 2025, 4:21 AM

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Hey! Got busy with other issues. I know its late but any chance I can get some time to look into it?

#Retrieve qrcode vertices