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Discriminative Learning of Local Image Descriptors

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G-block T-block<br />

G-block: Gaussian smoothing.<br />

S-block/<br />

E-block<br />

N-block<br />

T-block: Non-linear transformation to each sample grid in<br />

smoothed patch.<br />

S-block/E-block: Spatial pooling <strong>of</strong> the T-block responses.<br />

S-block uses parameterized pooling regions, E-block is<br />

non-parametric.<br />

N-block: SIFT-style Normalization.

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