Table 5 First part results: parameter calibration

Canny

Maximum threshold

101

Minimum threshold

24

DoG

Kernel 1

15

Kernel 2

9

FDoG

Half_w

9

M

1

ρ

3.9937902

σ1

1.3616940

σ2

4.6370154

Gray threshold

0.99

Proposed approach

Color constancy algorithm

GrayWorld

Channel

Y

Smoothing

Gaussian (5×5)

Brightness

−80

Contrast

80

Gamma

4