Powershell commands for Copying Image Between Storage Accounts:

Use AZCopy Utility:

 AzCopy /Source: https://<SourceStorageAccountName>.blob.core.windows.net/
<SourceContainerName>
      /Destination:
https://<DestinationStorageAccountName>.blob.core.windows.net/<DestinationContainerName>
      /SourceKey:<SourceStorageKey>
      /DestinationKey:<DestinationStorageKey> 
      /Pattern:<ImageFileName>