Vol.5 No.3 2012

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Research paper : Developing an evaluation system of visually induced motion sickness for safe usage of moving images (H. Ujike)−140−Synthesiology - English edition Vol.5 No.3 (2012) person engages, and people who experience motion sickness in aircraft simulators are banned from flying the aircraft for 24 hours after the simulator training.[4]With the advancement of image technology, the moving images are now used widely in various fields such as education, medicine, and welfare. To ensure many people can enjoy the benefits, the provision of the environment that prevents the occurrence of undesirable biomedical effect of moving images such as VIMS is mandatory and urgent. AIST created the term “image safety” as a concept to realize this, and is promoting the creation of a moving image guideline and is engaging in the international standardization activity.[5] Image safety is not only important for the user of the moving images. For the Japanese image industry to advance steadily, image safety should be like the wheels of an automobile that works alongside the development of the image technology, and is absolutely necessary from the viewpoint of the people of image industry. Therefore, image safety is an issue that must be tackled with the cooperation and mutual understanding of the people of the image industry such as the production companies, image distributers, and image display device developers. Through joint research conducted under close cooperation and collaboration among external research organizations such as the universities and industry people, the author engaged in the R&D for the VIMS evaluation system, the tool to provide the solution. In this paper, I describe the necessity of the VIMS evaluation system and discuss the research scenario that led to the development.2 Background of the R&D2.1 Motivation that led to the R&DTo reduce the possibility of VIMS, it is necessary to create a guideline based on objective findings related to the factors that cause VIMS and the degree of effect of VIMS. However, guidelines may not be sufficient. A guideline basically has no binding power even if it becomes the international standard of the International Organization for Standardization (ISO).For the guideline to be effectively utilized, it is necessary to create and review the guideline under the cooperation of the parties involved in production and distribution such as the image providers that use the guideline. There are a few points that must be considered. First, the image provider needs to understand that some effects of VIMS cannot be neglected. In general, many people may consider VIMS as a minor problem and whatever measures may be taken lightly. However, over 10 % of the students had to receive hospital treatment in the case of Shimane junior high school mentioned earlier,[3] and it may be dangerous for people to engage in certain works immediately after viewing. Second, sufficient consideration must be given to the freedom of expression and freedom of artistic creativity. Guidelines and international standards are often taken as agents that limit the art of image production, and the image providers are concerned that they may unjustly threaten the freedom of expression and artistic creativity. It is necessary to make considerations so people would not reject image safety. The following methods may be useful.(1)Prior to the creation of the image guideline to reduce VIMS, the importance of image safety including VIMS must be communicated in various ways.(2)A method that enables the image provider to specifically check the degree by which VIMS may occur by viewing certain images is developed, and this tool is used to raise the awareness for VIMS.While issue (1) deviates from the topic of this paper, issue (2) is the origin from which we developed the VIMS evaluation system described in this paper.2.2 Necessity of R&DThe VIMS evaluation system is a system to evaluate the degree of VIMS that may occur in people who view certain images. By entering the image that one wishes to evaluate, the degree of VIMS that may occur in the viewer is displayed as variation over time. This system is essential from the perspective of having the image providers understand the seriousness of VIMS and to reduce the occurrence of VIMS by utilizing the image guideline that will be created in the future (Fig. 1).First, the system will be the tool that enables the image providers to specifically understand the degree and Fig. 1 Effect of use of the VIMS evaluation system on reduction of VIMSReduction of VIMSUtilization of the image guidelineAwareness of the importance of VIMSImage providerConsideration of coping strategies for dealing with the image scenes that the results of evaluation indicate the necessity of the reviewChecking theproduced imageby objectiveevaluationUnderstanding theVIMS conditions beforeimage productionUse of the system in each phase of image productionEstimation ofthe temporalvariation of VIMSVIMS evaluation systemMovingimagesFunction of the VIMS evaluation system

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