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Detection of a sparse submatrix of a high-dimensional noisy matrix
We observe a $N\times M$ matrix $Y_{ij}=s_{ij}+\xi_{ij}$ with $\xi_{ij}\sim\CN(0,1)$ i.i.d. in $i,j$, and $s_{ij}\in\R$. We test the null hypothesis $s_{ij}=0$ for all... -
Statistical methods for descriptor matching
Many applications, as in computer vision or medicine, aim at identifying the similarities between several images or signals. There after, it is possible to detect...
