Erratum to: Approximating adaptive distance measures using scalable feature signatures

Erratum to: Multimed Tools Appl

DOI 10.1007/s11042-014-2251-4

The original article contained an incorrect equation in “3 Scalable feature signatures,” under the section Total Orderings. The equation corresponding to the distance function inspired by the Ward’s method missed a square in the expression and also repeated the delta symbol in the lower index. The correct equation is shown below:

$$ {\delta}_{W{L}_2}\left({t}_i,{t}_j\right)={L}_2^2\left({r}_i,{r}_j\right)\left({w}_i{w}_j\right)/\left({w}_i+{w}_j\right) $$