Takashi Kajinami

Augmented perception of satiety: controlling food consumption by changing apparent size of food with augmented reality

The main contribution of this paper is to realize a method for modifying perception of satiety and controlling nutritional intake by changing the apparent size of food with augmented reality. As a possible method for decreasing rates of obesity, we focused on controlling food intake implicitly without any effort. We hypothesized that ambiguous perception of satiety can be applied to control our food intake. Recent psychological studies have revealed that the amount of food consumed is influenced by both its actual volume and external factors during eating. Based on this knowledge, we sought to control perception of satiety gained from the same amount of food by changing its apparent size. We also proposed a method for food-volume augmentation using real-time shape deformation. Our results suggest that this augmentation can control the perception of satiety and food intake.

Modifying an identified curved surface shape using pseudo-haptic effect

In our research, we aim to construct a visuo-haptic system that can provide users with the sensation of touching virtual objects of varying shapes, using pseudo-haptic effects. In this paper, we focus on modifying the identification of a shape of a curved surface when touching it with a pointing finger, by displacing the visual representation of the users hand. We compose a video see-through system through which we can change the shapes of objects the user is visually touching, and displace the visual representation of the users hand as if he were touching the visual shape although in actuality he is touching another shape. Using this system we perform an experiment to investigate the effects of visuo-haptic interaction and we evaluate its effectiveness. The results show that over 80% of the participants answered that they perceived the virtual objects shape to be different from the actual shape they touched, which proves the possibility for constructing a novel visuo-haptic system.

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So far, gustatory information has rarely been studied in relation to computers, even though there are lots of studies on visual, auditory, haptic and olfactory information. This scarcity of research on gustatory information has several reasons. One reason is that gustatory sensation is based on chemical signals, whose functions have not been fully understood yet. Another reason is that perception of gustatory sensation is affected by other factors, such as vision, olfaction, thermal sensation, and memories. Thus, complexity of cognition mechanism for gustatory sensation as described above makes it difficult to build up a gustatory display.

Modifying an identified angle of edged shapes using pseudo-haptic effects

In this paper, we focus on modifying the identification of an angle of edges when touching it with a pointing finger, by displacing the visual representation of the users hand in order to construct a novel visuo-haptic system. We compose a video see-through system, which enables us to change the perception of the shape of an object a user is visually touching, by displacing the visual representation of the users hand as if s/he was touching the visual shape, when in actuality s/he is touching another shape. We had experiments and showed participants perceived angles of edges that was the same as the one they were visually touching, even though the angles of edges they were actually touching was different. These results prove that the perceived angles of edges could be modified if the difference of angles between edges is in the range of −35° to 30°.

Digital Display Case: Museum exhibition system to convey background information about exhibits

In our research, we aim to construct the Digital Display Case system which we can introduce into exhibition rooms in museums like conventional display cases, to tell visitors the background information about the exhibit more effectively. We categorize the background information into diachronicity and synchronicity, and decide specifications of the system to convey these information. Then we construct the prototype of the system based on them. With this prototype, we make sample exhibitions to tell the background information about the exhibits, and get review from museum over it.

Digital display case: the exhibition sysytem for conveying the background information

In our research, we aim to construct an interactive exhibition system for museums to convey the background information about its exhibit, which todays museums need. Museums have to preserve their exhibits, and that was a limitation on the exhibition form. They cannot hold a quite new type of exhibition because it might jeopardize their exhibits. So they cannot do more than the exhibition with conventional display cases and panels, in other words a passive exhibition to convey the background information. Digital technologies untie them from this limitation. We can convey the background information effectively using CG in exhibitions, without jeopardizing real exhibits.

Virtual Jizai-Ryu: Hi-Fidelity Interactive Virtual Exhibit with Digital Display Case

This paper proposes a high-definition digital display case for manipulating a virtual exhibit that has linking mechanisms. This technique enhances the understanding of dynamic exhibits. It is difficult to construct interactive contents of dynamic virtual exhibits, because measuring the mechanism invokes the risk of an exhibit’s deterioration, and it takes tremendous efforts to create a fine spun computer graphics (CG) model for mechanisms. Therefore, we propose an image-based interaction method that uses image-based rendering to construct interactive contents for dynamic virtual exhibits using the interpolation between exhibit pictures with a number of deformational conditions and viewpoints. Using this method, we construct a high-definition digital showcase and exhibit the interactive content at a museum to evaluate the availability of our system.

High-definition digital display case with the image-based interaction

This paper proposes a high-definition digital display case for manipulating a virtual exhibit that has linking mechanisms. This technique enhances the understanding of dynamic exhibits. It is difficult to construct interactive contents of dynamic virtual exhibits, because measuring the mechanism invokes the risk of an exhibits deterioration, and it takes tremendous efforts to create a fine spun computer graphics (CG) model for mechanisms. Therefore, we propose an image-based interaction method that uses image-based rendering to construct interactive contents for dynamic virtual exhibits using the interpolation between exhibit pictures with a number of deformational conditions and viewpoints. Using this method, we construct a high-definition digital showcase and exhibit the interactive content at a museum to evaluate the availability of our system.

Digital display case: a study on the realization of a virtual transportation system for a museum collection

This paper describes our proposed virtual transportation system. Our proposed system is a display case for use at art museums, which is based on computer graphics and image-based rendering (IBR) techniques. Using this system, anyone can simply create and realistically represent virtual cultural assets. This system consists of two main components: a display unit and a capture unit. The display unit is in the shape of a conventional display case in order to represent virtual cultural assets. The capture unit, which is created by attaching cameras to a conventional display case, reconstructs cultural assets using IBR techniques. In our experiment, we implemented a basic system using View Morphing as the IBR technique. The results show that this system can represent virtual cultural assets as 3D objects on the display unit by using arbitrary view images that are interpolated by View Morphing.

Meta-ryoshka: haptic illusion on perceiving shape

Meta-ryoshka is a system which enables us to experience a haptic illusion as if we were touching variety of shapes even though we are touching onlu a simple cylinder in faict (Fig.1).