For the 52 queries, we ask what percent of the 52 answers were found within a particular scope. These results are shown in figure 5 for scopes of 1 and 100. Note that joint histograms have a higher recall level at a scope of 1 than color histograms have for a scope of 100. Thus a user who was only willing to look at the top image returned using joint histograms would do better than a user willing to look at the top 100 images returned using color histograms. Scope versus recall results.
Higher numbers indicate better performance.
Virginia Ogle and Michael Stonebraker. Retrieval from a relational database of images. Jing Huang, S. Ravi Kumar, Mandar Mitra, Wei-Jing Zhu, and Ramin Zabih. Image indexing using color correlograms . Jing Huang, S. Ravi Kumar and Ramin Zabih.