s R (x) = a 1 s O (x) + a 2 y Text (x) + a 3 y Visual (x) Re-scoring Function Approach Mean nDCG @ 20 Relative Improvement Baseline (a 2 = a 3 = 0)0.6854– Baseline + y Text (a 3 = 0)0.7077+3.3 % Baseline + y Visual (a 2 = 0)0.6136–10.5% Baseline + y Text + y Visual 0.7692+12.2%
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