A Study of Feature Combination for Vehicle Detection Based on Image Processing

Table 8

Diversity measures for the front close/middle region: (a) Double Fault (DF) and (b) correlation coefficient. The DF is given as an absolute number rather than a probability for easier interpretation. For instance, PCA and V-HOG make only simultaneous errors on 3 samples of the total testing set of 1000 images.

(a)

DF	PCA	V-HOG	LG	𝑆	𝐺
PCA	—	3	2.4	9.8	3
V-HOG	3	—	7.2	7.8	4.6
LG	2.4	7.2	—	2.8	9.2
𝑆	9.8	7.8	2.8	—	8
𝐺	3	4.6	9.2	8	—

(b)

𝜌𝑖,𝑗	PCA	V-HOG	LG	𝑆	𝐺
PCA	1	0.06	0.06	0.03	0.05
V-HOG	0.06	1	0.24	0.03	0.12
LG	0.06	0.24	1	−0.04	0.30
𝑆	0.03	0.03	−0.04	1	0.02
𝐺	0.05	0.12	0.30	0.02	1