Hello,
Besides the portal way to upload the images, you can upload by using APIs. This is the current workaround. For portal, I have forwarded this feedback to product team and hope we can do this in portal as well.
We do have API working with URL:
CreateImagesFromUrls:
https://southcentralus.dev.cognitive.microsoft.com/docs/services/Custom_Vision_Training_3.3/operations/5eb0bcc6548b571998fddec7
ClassifyImageUrl:
https://southcentralus.dev.cognitive.microsoft.com/docs/services/Custom_Vision_Prediction_3.1/operations/5eb37d24548b571998fde5f5
DetectImageUrl:
https://southcentralus.dev.cognitive.microsoft.com/docs/services/Custom_Vision_Prediction_3.1/operations/5eb37d24548b571998fde5f9
If an URL to the image in azure storage is provided, it will work.
Regards,
Yutong