xi | Intensity value of pixel i |
h(x) | Histogram of the image I,x ∈ [0,L-1] |
r | Image size in terms of pixel numbers |
Tr (I) | Transformation function of image I |
pj (xi; θj) | j-th probability density function with parameter set θj |
μj | Mean of cluster j |
∑j | Variance of cluster j |
within2 between2 |
Within-class variance, Between-class variance. |
ω (T)i=1,2 | Probabilities of the two clusters separated by threshold T |
f (x) | Image expressed with spatial term x, which refers to pixel location |
λ (in GMAC) | Scalar that controls the balance between regularization and data |