The mean-shift algorithm belongs to the density estimationbased
nonparametric clustering methods, in which the feature
space can be considered as the empirical probability density
function of the represented parameter. This type of algorithms
adequately analyzes the image feature space (color space, spatial
space or the combination of the two spaces) to cluster and can
provide a reliable solution for many vision tasks [16]. In general,
the mean-shift algorithm models the feature vectors associated
with each pixel (e.g., color and position in the image grid) as
samples from an unknown probability density function f(x) and
then finds clusters in this distribution. The center for each cluster