Comparison of the multimodal MRF (blue squares) and baseline methods described in Section 5 for different numbers of relevant documents. We show the performance of the base retrieval system (dark-red rightwards-triangles), the late fusion technique (green upwards-triangles), and intermedia relevance feedback in its two variants (red rhombus) and (yellow downwards-triangles). The plot shows the average MAP of each method (y-axis) against the number of relevant feedback images considered (x-axis).