Abstract
We have prototyped a KANSEI multimedia display (KMMD) that is able to release scent through the screen in order to realize collaboration between images and scents. Two types of “sukiyaki” food videos were presented to subjects using this device, and a method for objectively evaluating the realistic sensation of the food videos was examined using biological reaction measurements. The sukiyaki scent was added to one type of video to improve appetite. Viewers’ saliva flow rate, line of sight, pupil diameter, autonomic nerve activity, and cerebral blood flow were measured at the same time, and changes in these measured values were analyzed. As a result, the scent was effective in improving the sensation, as if the food was present in front of the eyes and increasing the saliva flow rate. Additionally, in a realistic scene, it was found that the line of sight follows the performer’s eating behavior as if the viewers themselves are eating. The sympathetic nervous system temporarily increases, mydriasis occurs, and the frontal lobe is activated. Furthermore, the possibility of objective evaluation of realistic sensations was demonstrated by the correlation between appetite, accompanied by salivary sensation, and the biological reaction measurement results.
Highlights
As eating is a basic behavior, humans have a strong desire for delicious food
We have proposed and prototyped a device called KANSEI multimedia display (KMMD) (Kansei multimedia display) that enables the discharge of scents from the screen for the purpose of realizing collaboration between images and scents on large-screen displays such as electronic advertisements [7]
In this experiment, we focused on how appetite changes while watching a video, whether there is a difference in saliva flow rate, length of video viewing, differences in excitement and relaxation depending on the scene, and whether the scent presentation improves appetite
Summary
As eating is a basic behavior, humans have a strong desire for delicious food This is why the food industry is expected to grow more and more steadily. Suppliers of foodstuffs try to develop and use various video advertisements that make food look more delicious. As cooking videos are effective in increasing our appetite, they are expected to urge those people with little appetite due to aging or anorexia to eat regularly. In this way, food video contents that affect human senses could have great potential in terms of multiple uses in the food industry. There are tasks yet to be considered regarding the development of displays to make dishes look more realistic, their contents, and the method of evaluation to measure realistic sensations
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