The Acoi project provides a large-scale experimentation platform to facilitate studies in the area of indexing multimedia objects and their subsequent retrieval. The index model is based on assembling the results of feature detection algorithms into hierarchical structures to classify the objects. This paper provides an overview of the Acoi architecture and the Feature Detector Engine (FDE) model. Central to its design is a grammatical description of the feature relations to classify the multimedia objects and to steer their detection and storage. Its role is informally introduced.

Information Systems [INS]
Intelligent and autonomous systems

Kersten, M., Nes, N., & Windhouwer, M. (1998). A feature database for multimedia objects. Information Systems [INS]. CWI.