The cabinet cards or cartes de visite that you are viewing is protected by the Digimarc ditial watermarking system. Invisible to the naked eye the image is encrypted with copyright information that can be tracked across the internet and viewed on a computer using Photoshop or a smart phone. It is impossible to remove this encryption.
If you wish to publish images from the archive please contact Marcus Bunyan. Permission is easily given for proper use.
Dr Marcus Bunyan August 2012