Table 6 The number of features using principal component analysis (PCA) and without using PCA
From: Feature extraction for the analysis of colon status from the endoscopic images
Number of Features | |||||
|---|---|---|---|---|---|
{C} | Without PCA | With PCA | |||
τ = 5% | τ = 2% | τ = 1% | τ = 0.1% | ||
{I, R, G, B, H, S} | 36 | 3 | 5 | 9 | 15 |
{I, R, G, B} | 24 | 3 | 6 | 8 | 13 |
{H, S, I} | 18 | 4 | 7 | 8 | 11 |
{H, S} | 12 | 4 | 6 | 7 | 9 |