TESI DOCTORAL - La Salle

5.3. Multimodal consensus clustering results
Data Consensus Consensus function
set type CSPA EAC HGPA MCLA ALSAD KMSAD SLSAD
λ
IsoLetters
image %exp 3.6 0 0 0 17.9 5 3.6
c
∆φ (NMI) -7.3 -42.9 -39.2 -18.8 -10.1 -9.1 -22
λ speech %exp 0 0 0 0 10.7 7.1 3.6
c ∆φ (NMI) -17.3 -59.8 -37.5 -20.3 -4.8 -10.2 -42.1
λ image+speech %exp 10.7 0 0 0 7.1 8.6 0
c ∆φ (NMI) -5.8 -33.2 -38.2 -16.1 -8.6 -8.5 -16.2
λ
CAL500
audio %exp 3.5 0 0 1.4 25 7.8 0
c ∆φ (NMI) -9.4 -50.5 -37.5 -17 -5.8 -7 -37.3
λ text %exp 28.6 0 13.5 1.4 21.4 26.4 7.1
c
∆φ (NMI) -4.1 -24.2 -11.7 -14.9 -5.5 -4.6 -23.1
λ audio+text %exp 21.4 0 5.7 0.7 28.6 21.4 3.6
c ∆φ (NMI) -4.3 -44.8 -18.1 -19.6 -4.2 -6.1 -23.3
λ
InternetAds
object %exp 0 3.6 0 0 0 0 0
c ∆φ (NMI) -45.1 -72.8 -99.9 -45.4 -43.3 -41.7 -61.9
λ collateral %exp 0 0 0 0 3.6 4.3 0
c ∆φ (NMI) -81.7 -80.2 -99.9 -70.5 -70.3 -64.8 -87.7
λ object+collateral %exp 0 0 0 25 3.5 3.6 3.6
c
∆φ (NMI) -41 -82.5 -99.9 -38.6 -34.7 -42.3 -42.8
λ
Corel
image %exp 25 0 0 3.6 39.3 9.3 3.5
c
∆φ (NMI) -2 -56.7 -43.5 -28.9 -4.8 -7.1 -28.8
λ text %exp 35.7 0 5.7 1.4 14.3 15 10.7
c
∆φ (NMI) 21.3 -56.3 -34.3 -24.6 -9.5 -8.4 -34.2
λ image+text %exp 39.3 0 0 11.4 32.1 10 7.1
c
∆φ (NMI) 6.6 -60.6 -40.7 -24.4 -4.9 -8.2 -29.4
148
Table 5.3: Evaluation of the unimodal and multimodal consensus clusterings with respect to the best cluster ensemble component (or
BEC), across the four multimedia data collections and the seven consensus functions. The symbol %exp denotes the percentage of
experiments in which the evaluated consensus clustering is superior to the BEC, and ∆φ (NMI) stands for the relative percentage φ (NMI)
difference of the former wrt the latter.