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3. CONSIDERATIONS
3.1 Differences of systems and results
In the previous section were discussed the various technologies available for the 3D measurement of the human body. Different companies are employing these technologies for the development and production of systems for the digitization of the human body. These systems differentiate themselves strongly and for the normal user it could be a problem to determine which system best suits to his specific application.
We take as example the case of full body scanning systems. Twenty one companies, world wide, are producing and selling more than thirty different full body scanners. Figure 12 shows some results obtained by the 3D scanning process from different products. As can be seen, the results differ a lot: there are point clouds, surface models, textured models, unprocessed data, etc.. In fact, the used equipment is different, the employed processing is different and the targeted applications are also different. This variability results also in a very large price range of the products: full body scanning systems are available from 20'000 Euro up to 400'000 Euro. 
With such large offer of different products with different results and with a very large price range, the process of selecting the adequate system plays a key role. To perform a correct analysis and selection, it is important to clearly list all the requirements and to consider as many criteria as possible. The following table give some examples of important information that has to be determined in advance, before selecting the scanning system. This regards, for example, the desired measurement part, the expected type of result, the limitations regarding processing and location. 
3.2 Additional required software
For the completion of the overview on the actual state of the technology for the digitization of the human body, the required and helpful software has also to be described.
The raw data resulting by the scanning process can usually not be used in its original form. Mostly scanning systems are therefore provided with standard software for the visualization, for the treatment, for the exporting and eventually for the editing of the data. Figure 13, on the left, shows for example the result achieved by the full body scanner of Wicks and Wilson12 and at the center the result of a head scanning system of InSpeck4. It can be clearly noticed that raw data of the full body scanner has to be processed. In the case of the head scanner, the result shown has already been processed.
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