Special issue on 3-D image analysis and modeling.

In the recent days, Three-dimensional (3-D) images are widely used for a lot of applications, and recent advances in computer performances have extremely extended the range of applicability. This vitality is witnessed by the increasing number of papers presented in past conferences and by the number of research projects related to 3-D images. Three- dimensional data are inherently more informative, in geomet- rical terms, than simply optical data, but also pose difficult problems that should be faced to obtain a reliable processing framework. Range resolution, type of noise, surface material are all aspects that should be considered in relationship with the sensing device and the application domain.