Article Preview
Top1. Introduction
Recently, many multifunctional cellular phone terminals, such as smart phones (e.g., Android and iPhone), have been developed as a result of the evolution of the computer, network infrastructure, and lightweight battery technology. Thus, the number of users is rapidly increasing (Mobile Content Forum, 2009). The smart phone is equipped with various sensor systems (e.g., an acceleration sensor, an infrared sensor, and a luminosity sensor), besides the camera function. Furthermore, an easily programmed application acquires input from each function. Various research and services are performed with a smart phone using such features. Examples are the study of a service that recommends cosmetics that are appropriate for the skin condition by transmitting the skin image from the camera function to an analysis server using a data mining (Hiraishi & Mizoguchi, 2012)(Nishiyama & Mizoguchi, 2011)(Nishiyama & Mizoguchi, 2013), and a navigation service using location information. Studies of skin diagnosis using data mining have been performed in the past (Gagliardi, 2012). With these services (Hiraishi & Mizoguchi, 2012)(Nishiyama & Mizoguchi, 2011)(Nishiyama & Mizoguchi, 2013), information obtained from various sensors of the smart phone is transmitted to a server via the network; next, the server performs analysis and calculation are executed on the server side; and finally, the result is displayed on the smart phone. Thus, the server should have the computational performance and the communication performance to enable correspondence even if many requests are received at the same time (Hiraishi & Mizoguchi, 2012), and to strengthen the server environment as the number of users increases. However, some users may send to the server the image is not a skin caused by shooting mistakes (or intentionally). In particular, in the evaluation stage of this experiment skin diagnostic services start early, users who submit images “Malicious” with variety, such as egg yolk and refrigerator were present. If such “Malicious” images have had more, because the adverse effect on the performance analysis of server side, some measures were also necessary. Moreover, the calculation ability of the smart phone and the portable terminal PDA has advanced more rapidly than that of the past cellular phone terminal such that these devices now have the same processing performance as a small notebook computer. Therefore, interest in research into data mining with a portable terminal has also increased.