Complex sentence: For the creation of Seadragon style content and images, when one uploads a picture it is converted into a number of Deep Zoom Image (DZI) format files which can be combined to make up a Deep Zoom Collection (DZC).
Split into simpler sentences: For the creation of Seadragon style content and images, when one uploads a picture, it is converted into a number of Deep Zoom Image (DZI) format files. These can be combined to make up a Deep Zoom Collection (DZC).