use gcloud
gcloud compute --project=project2 images create image-2 --source-image=image-1 --source-image-project=project
NOTE: -- pproject = project-id NOT project-name
use gcloud
gcloud compute --project=project2 images create image-2 --source-image=image-1 --source-image-project=project
NOTE: -- pproject = project-id NOT project-name