A Statistical Image Feature-Based Deep Belief Network for Fire Detection

Table 1

Statistical features of gray-scale image.

Symbol	Name	Equation
s1	Arithmetic mean
s2	Median
s3	Standard deviation
s4	Skewness
s5	Kurtosis
s6	Entropy
s7	Energy

Note. is the n-th pixel in the gray-scale image; N is the total pixel number. In the equation of median, denotes the ordered list of , and and denote the floor and ceiling functions. In the equation of entropy, k denotes the number of gray-scale value, and f_k denotes frequency of k-th value.