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Aggregating local image descriptors into compact codes

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Academic year: 2021

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Fig. 1. Images and corresponding VLAD descriptors, for K=16 centroids. The components of the descriptor are represented like SIFT, with negative components in red.
Fig. 2. Comparison of the Fisher and VLAD representations with and without reduction of the local descriptors with PCA (mAP on Holidays).
TABLE II
Fig. 3. Effect of the encoding steps on the descriptor. Top: VLAD vector x for K=16 (D=2048)
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