Image segmentation is the process of segmenting the image into non-overlapping regions.
Image segmentation does not require that the pattern classes are known. However, segmentation is not a well-defined problem in the case of unconstrained images. Furthermore, for unconstrained images there is no way of establishing the ground-truth segmentation in order to evaluate the correctness of any given segmentation . There are multiple ways to choose the partitions to satisfy the constraints in Eq 5.1 . For example, Figure 5-4 illustrates two ways to segment the Barbara image in order to satisfy Eq 5.1 .