The previous chapters presented algorithms and data structures for building an isosurface for a given isovalue. In this chapter, we discuss algorithms and techniques for choosing this isovalue.
Choice of isovalue is application dependent. Diﬀerent imaging devices, different materials, and diﬀerent areas of interest dictate diﬀerent choices for the isovalue. Nevertheless, there are some generic algorithms and techniques that can assist in ﬁnding the isovalue that determines the desired isosurface.