SIFT representation comparison

We can see that the overall quality is almost the same and it is between 80-90%. The best classifier was overlapping SIFT with topology 15x9x25 with the classification rate approximately 90%. However, even the simplest SIFT had the classification rate around 82%.

Table 4.7: SIFT representation comparison(see figure 4.12 on page )

SIFT Representation	Classification Rate [%]
SIFT-Ori SIFT	84.78
SIFT-Grad	86.96
SIFT-GradWei	89.13
SIFT-Ori (overlapping)	82.6
SIFT-Grad (overlapping)	88.04
SIFT-GradWei (overlapping)	90.22

Figure 4.12: Here we can see that overlapping SIFTs performed better except the simplest case