Is it possible to use ARFoundation's ImageTracking to display the same object on all the same marker

[taeyoungkimbgl]

※Development Environment
Windows 10
Unity 2021.3.23f1
AR Foundation 4.2.8
Google ARCore XR Plugin 4.2.8
ARKit XR Plugin 4.2.8
XR Plugin Management 4.3.3

I am using ARTrackedImageManager with android and iOS tablets.

Is it possible to use ARFoundation’s ImageTracking to display the same object on all the same markers on the camera?

For example, the following asset.

MarkerBased AR Example | Tutorials | Unity Asset Store

I have tried, for example, registering the same image in the Reference Image Library as a marker with a unique name and setting Max Number Of Moving Images to 2.
(I have attached the image I set up.)

The result was no recognition whether I put one marker on the camera or two markers on the camera.

I would like to achieve this functionality with ARFoundation alone, without any other assets if possible,
I would appreciate any advice on how to do this.

[andyb-unity]

The images you selected are very difficult for ARCore or ARKit to track. These systems are not designed to track QR codes.

Note ARCore best practices:

• Avoid images with heavy compression as this interferes with feature extraction.
• Avoid images with that contain a large number of geometric features, or very few features (e.g. barcodes, QR codes, logos and other line art) as this will result in poor detection and tracking performance.
• Avoid images with repeating patterns as this also can causes issues with detection and tracking.
• Use the arcoreimg tool included in the ARCore SDK to get a quality score between 0 and 100 for each image. We recommend a quality score of at least 75. Here are two examples:

Apple does not publish a comparable best practices guide but these notes also apply to ARKit in our experience.

[taeyoungkimbgl]

@andyb-unity

The images you selected are very difficult for ARCore or ARKit to track. These systems are not designed to track QR codes.

Note ARCore best practices:

Apple does not publish a comparable best practices guide but these notes also apply to ARKit in our experience.

Thanks so much for always replying to me.

I tried with the Earth image from Example image2 in Note ARCore best practices.

The result was not recognized.

I think that if the same image is in the Reference Image Library, the marker cannot be recognized, am I making a mistake?

As mentioned in the title, I would like to know if there is a way to recognize all markers when there are several that are the same.

Setting details

[andyb-unity]

How would you suggest that the platform distinguish between two identical images? No, to my knowledge there is no way to visually distinguish between two identical images. Using multiple copies of the same image in a reference image library is undefined behavior as far as Unity is concerned.

[taeyoungkimbgl]

@andyb-unity

How would you suggest that the platform distinguish between two identical images? No, to my knowledge there is no way to visually distinguish between two identical images. Using multiple copies of the same image in a reference image library is undefined behavior as far as Unity is concerned.

I am very grateful for your reply.

I understood about the following.
Using multiple copies of the same image in a reference image library is undefined behavior as far as Unity is concerned.

Now then, I have only added one image of the earth to the reference image library and have confirmed that if there are multiple markers of the earth, only one of them will be recognized.
Is it impossible for Unity to recognize all of these?

[andyb-unity]

Unity does not author any image tracking software. We provide a cross-platform C# interface to platform implementations. Refer to your platform’s documentation (ARCore, ARKit, etc) for information about the platform capabilities.

[taeyoungkimbgl]

@andyb-unity

Unity does not author any image tracking software. We provide a cross-platform C# interface to platform implementations. Refer to your platform’s documentation (ARCore, ARKit, etc) for information about the platform capabilities.

I appreciate your advice, and I will be sure to keep it in mind as I go through the process.
You are right I would like to check the functionality of the platform.

[andyb-unity]

In the future we intend to add more platform documentation links to our package docs to reduce the amount of homework necessary for developers like you to reason about platform API’s. Best wishes on your app!