We propose a new method in which scents are emitted through the display screen in the direction of the viewer to enhance the reality effect of the visual images. A thin LED display panel filled with tiny pores was made for this experiment and an air control system with a blower was placed behind the screen. We experimentally proved that the direction of airflow could be controlled and scents could properly travel through the pores to the front side of the screen aimed at the viewer. The effectiveness of the scents and the psychological effects were evaluated by the subjects' biological responses and answers to a questionnaire. By analyzing their biological responses, more significant changes in skin conductance were detected when the advertisements were presented with visuals and scents than with visuals alone. Therefore, we had a lot of good reasons to objectively evaluate the psychological effects of visuals with scents.
We introduce a prototype of a rotatable ray scan system for flatbed autostereoscopic display systems. The main feature of the new system is the rotatable scanning unit for capturing objects at a depression angle. The scanning unit of the new system can be easily rotated with the case. Both depth correction and vertical perspective correction are necessary for flatbed 3-D image synthesis. Since the rays acquired by this system are very high density, an adaptive 3-D image can be synthesized for flatbed autostereoscopic displays.
The purity discrimination threshold of monochromatic light and mixed light was investigated in the mesopic condition. Monochromatic light and mixed light were first resolved into their components of pure color light of dominant wavelength and white light. By Using the definition of colorimetric purity, the luminance ratios of the pure color light to white light were obtained. The pure color light component in mixed light was calculated Using the luminance ratios. The purity discrimination threshold of monochromatic and mixed light is expressed by the ratio of the pure color component to the white light of a reference field. Therefore, this purity discrimination threshold can be expressed in a unified manner.
We provide a subjective and objective evaluation of the viewability of high-definition images. First, we examined the preferred viewing distance for images of different sizes, including monoscopic and stereoscopic ones. Second, we measured the eye movements of participants on comparing the preferred with the non-preferred viewing distance. The results indicate two points. First, for larger images (greater than 70 in.), including either stereoscopic or monoscopic images, the preferred viewing distance is 2.0 to 2.5 times the absolute display height. Second, eye movement may determine a person's preferred viewing distances. These results could provide a guideline for the design of the visual environment, including larger, stereoscopic display systems with high-definition.
We have developed wire-grid polarizers with low reflectivity in the visible region. The polarizers consist of a bilayered structure of an absorptive layer and a (transparent) gap layer on sub-wavelength pitch gratings made of aluminum. The bilayered structure functions as a highly effective antireflection coating for wire-grid with high reflectance. In order to realize these multilayered wire-grid, the glancing angle deposition technique was used to deposit the absorptive layer just above the Al wire-grid covered with the SiO2 gap layer. Both low reflectance and high transmittance in the desired wavelength range were achieved by optimizing the thickness of each layer.
Recently, many methods for simulating natural phenomena on the basis of fluid simulation have been proposed. A method for simulating explosions was also proposed, but the shapes of the simulated explosions depend on many simulation parameters. Therefore, creating the desired shape for an explosion as specified by the user is difficult. In this paper, we propose a method for controlling explosion simulations in order to form the desired shapes. Our method optimizes the initial intensity distribution of an explosion and controls the simulation to minimize the difference between the target shape and the shape of the simulated explosion. We use a predictive approach to control the explosion simulation accurately. Using the proposed method, animations of explosions controlled into specified shapes can be generated.
Two people usually walk through a corridor in a parallel position. However, they spontaneously switch their positions from the parallel to the cascade position when they pass oncoming people. We propose a method for enabling a robot to switch the parallel and the cascade positions autonomously with the movement of oncoming people and obstacles when it moves with a user in a daily environment. The robot uses two laser range finders to detect walls, the user's position, as well as surrounding people and obstacles. It autonomously decides whether to go on ahead or to give way to the user. Experimental results using a robot in a daily environment show that our method was effective.