No It doesn't. As soon as you upload image in author, image will be uploaded into DM. you can check in which mode you have configured your DM configuration , if it's upon activation, you can publish the Image and check whether it's resolved the issue or not. Make sure your local publish instance is up if you are trying from your local.
Since all the metadata properties are getting synced using the scene7 even handlers, check the error.log and scene7 log file during this process.