invalid reference image arkit 1.5

Question

I am running the apple sample project of ARKit 1.5 Image detection but when I place my reference image inside AR Resource folder and run the app I get following error:

Make sure all reference images are greater than 100 pixels and have a positive physical size in meters.

I don't find any predefined requirements of how should the image be, can anyone explain the required attributes of the image?

Answer 1

As in Apple's documentation

For each image, use the inspector to describe the physical size of the image as you’d expect to find it in the user’s real-world environment, and optionally include a descriptive name for your own use.

Click on your image and chose size inspector to provide size. :)

Answer 2

In my particular case, the dimensions were set and the image was named. But the name itself was invalid because I had another file (of a different type) named the same.

If the accepted solution cannot solve your issue, try changing the AR Resource's name.