For vector-valued data c and s are vectors and are the mean values and variances of the noise for the two constituent materials. This band is incorrectly classified and could lead to errors in models or images produced from the classified data. Discrete, single-material classification of a slice of human brain. Basis functions fit to histogram of human hand dataset. The bottom and left edges of the image are axes for each MRI value, with the intensity of the image representing the height of the histogram function.
Bright spots are pure materials, while the lines connecting the dots are mixtures.
The rightmost two white dots are pure fat and bone marrow in the hand. The lower yellow and red dot are pure skin and muscle, respectively. The green streak between the red and yellow dots is a mixture of skin and muscle. These fitted basis functions were used to produce the classified data used in the following figure. The opacity of different materials is decreased above cutting planes to show details of the classification process within the hand.