问题
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?
回答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. :)
回答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.
回答3:
I had same problem. Solved by using JPEG format instead of PNG
来源：https://stackoverflow.com/questions/49006651/invalid-reference-image-arkit-1-5