Caliph & Emir are Java & MPEG-7 based tools for textual as well as semantic annotation and retrieval of digital photos and images, supporting structured, unstructured and semantic, graph like annotation and content based, metadata based and semantic image retrieval.
The 0.9.19 Caliph & Emir release includes some major changes in the interface (just take a look an you will see) based on the feedback in a user centered evaluation, changes of a new development team member are integrated and the Derby database is included. Our new team member Margit (MrsMojo) implemented a search routine for Emir, which combines different visual descriptors. Check it out, it works great. Derby allows very fast retrieval of images based on content descriptors. Currently it is disabled by default because it is very basic and does not support updates, retrieval of combined visual descriptors and so on.
Also many bug fixes and other enhancements were included. Better take a look at the changes file.