1000 millions of pixels, that was good enoug. 1000 billions of pixels is better! But it’s really a technical challenge. Before we can see the first 1 Tera-pixel digital photo camera (don’t wait for it), Aperio defined an extension to the TIFF image format allowing to create such a large image.
Even better, they demonstrated the capacity with a composite 1 Tera-pixel image visible on their web site. This is a stitching of 255 pathology slides of breast tissue (not the most exciting photo, but…).