I. Introduction
The task of marking or extracting a group of pixels that belong to the same object, which is also known as image segmentation, is a major step in many image analysis applications [1]. In the literature, there are a large number of segmentation algorithms based on various methods such as thresholding [2], region growing (RG) [1], watershed [3]–[5], active contours [6], normalized graph cuts [7], and a variety of clustering approaches [8], [9]. Techniques based on the fuzzy set theory have also been proposed in regard to segmentation tasks [10]–[12].