Kensuke Tobitani

• Professor (Associate) at University of Nagasaki

The aim of this study is to construct a model for estimating impressions and emotions based on the hierarchical structure of emotions, focusing on the emotional quality of textured patterns on clothing. Impressions and emotions are quantified in subjective evaluation experiments on pattern images, and a sensitivity estimation model is constructed u...

We propose a texture synthesis method that controls the desired visual impressions using CNN style features and content features. Diversifying user needs has led to the personalization of products according to individual needs. In the custom made garment service, users can select and combine fabrics, patterns, and shapes of garments prepared in adv...

In the eld of fashion design, impressions evoked by the texture of materials, such as ashy and cool (affective texture), attract attention. The affective texture is considered necessary in evaluating and judging the quality of an object and personal preferences. In the fashion domain, there is a high demand for personalization of designs when diver...

We propose a texture synthesis method that controls the desired visual impression by using CNN style features and content features. Diversifying user needs has led to the personalization of products according to individual needs. In the custom-made garment service, users can select and combine fabrics, patterns, and shapes of garments prepared in a...

In this paper, we propose a method for indexing, analyzing, and evaluating of the stroking movement based on vibration features as a measurement method that mimics the response characteristics of finger associated with active touch. We developed the tactile information acquisition system to obtain the vibration information during stroking. Moreover...

The ultimate goal of this study is to provide intuitive design support for 3D objects. As a first attempt, we propose a method for estimating impressions of common 3D objects with various characteristics. Although many studies have been conducted to estimate objects’ aesthetics, not enough research has been conducted to estimate the various impress...

The impressions evoked by textures are called affective textures, and are considered to be important in evaluating and judging the quality of an object. And, technologies for understanding and controlling sensory textures are needed in product design. In this study, we propose a BTF prediction method using DNN as a first attempt to generate texture...

In this study, propose a method for estimating the impressions evoked by the style (texture and shape) of a suit for the purpose of a bespoke suit (recommendation) service. We collected 3398 images of suits and used Random Forest to model the relationship between the subjective impressions of 25 words assigned by psychological experiments and CNN f...

The titanium oxide layer undergoes diverse color changes due to thin film interference. Because of its high designability, expectations for various applications are increasing. Accurate representation of the interference color and texture of the oxide layer formation in simulation will lead to design support. In this study, we investigated the simu...

Customized products that can be manufactured according to customers' preferences and applications are attracting attention in the fashion field. One example of a customized product in the fashion field is the "bespoke" suit. Bespoke requires a tailor with expertise. A system that can automatically recommend the impression the user wants would be be...

We aim to provide cosmetics that appeal to users' “sensibility” and have accordingly developed cosmetics based on a sensibility evaluation. As the research subject, we chose exfoliating lotions. Our method correlates the visualized psychological structure with measured physical quantities. To visualize the psychological structure when using an exfo...

The platform of personal fabrication is developed by technologies such as 3D printing. However, most people do not have enough professional knowledge or skills to design these products. A promising approach relates subjective impressions to physical parameters to support intuitive design. This study aimed to build a model that predicts a “high-clas...

In the computer graphics field, the microfacets theory has been a hypothesis in many studies as an effective model for expressing light's reflection from a rough surface, but no studies actually observe microfacets as images. To establish a thin-film interference color simulation of a titanium oxide film based on a physical model in this study, we...

In this article, the authors study the relationships between the principal impressions of crinkle-finished surfaces, which are found on camera exteriors, and the characteristics of test images of crinkle-finished surfaces. They extracted impression words for the surfaces through subjective experiments with humans. The results suggest that the impre...

In product design, the impressions evoked by surface properties of objects attract attention. These impressions are called affective texture and demand is growing for technologies that quantify, index, and model it. Even in the fashion industry, the diversification of user needs necessitates the customization and personalization of products. Conseq...

In this article, the authors study the relationships between the principal impressions of crinkle-finished surfaces, which arefound on camera exteriors, and the characteristics of test images of crinkle-finished surfaces. They extracted impression words for the surfaces through subjective experiments with humans. The results suggest that the impres...

In order to increase the Kansei value of the glove box, we constructed a model to predict the opening behavior preferred from the relationship between impression evaluation and opening behavior characteristics. Based on this prediction model, we created a preferred opening behavior and verified its effect. From a result of the effect verification,...

The demand for a Kansei (sensibility) value-based product design has recently increased. Accordingly, the digitalization of sensory information is needed to realize the construction of a design framework that realizes the product design based on the Kansei value. No standard framework for digitalization has particularly been presented with regard t...

In recent years, there has been concern regarding the frequent occurrence of nighttime collisions. This research aims to clarify how differences in tail lamp design affect their visibility to other drivers, with a view to develop a design that will make tail lamps more conspicuous. By focusing on visibility in human face recognition abilities, we c...

In the field of Kansei (affective) engineering, the approach is often taken of modeling product's Kansei index to meet user's affective needs. This study work on modeling Kansei index automatically by machine learning using review text and images of products on the web. The proposed method follows: (1) Extraction of the main impressions of target d...

In the field of Kansei engineering, the approach is often taken of Kansei evaluation modeling expressing the relationships between physical features and impression of an object. However, in the conventional modeling method, personnel and time costs are very high because multiple experiments and analyses are needed to high precision modeling. In con...

In this study, we aimed to construct impression estimation models of clothing patterns based on style features and Kansei metric. We first conducted a subjective evaluation experiment and a factor analysis, and quantified visual impressions of flower patterns. Following that, we used style features using CNN as image features suitable for represent...

It is said that the form of the perceptual cross-modal integration, including visuo-tactile integration, is basically weighted average. In this study, we investigated whether the visuo-tactile information about the impression, the product of the higher-level cognitive process, integrates in this way or not. The results suggested that the visuo-tact...

We aim to provide cosmetics that appeal to users' "sensibility" and have accordingly developed cosmetics based on a sensibility evaluation. We examined exfoliating lotions that can be applied to a cotton pad and gently wiped across the stratum corneum, i.e., the outermost layer of the skin. Our method correlates the visualized psychological structu...

In this study, by proposing a model with a hierarchical relationship, we reconsidered the methodology utilizing the semantic differential technique. The proposed approach divided the subjective evaluation into the evaluative aspect and descriptive aspect, and identified the former as the upper layer expressing the level of value and the latter as a...

There is a wide range of requirements for representing skin quality in various fields, such as computer graphics and cosmetics. However, accurate representation of skin quality is a difficult technical issue, because of the complex physical characteristics of skin and its constituent substances and structure. The objective of this study is to clari...

We present a method to compare visual impressions given by the textures of real surfaces and 3D synthesized images of synthetic resins to improve the reality of CG images. We analyzed the structures of the visual impressions by conducting subjective evaluation experiments using real textures and generated images of the textures based on measurement...

In the present study, the subjective evaluation experiment for abstract 3D shapes was conducted as the first step of construction of a system that allows non-design-professional users to design 3D shapes via subjective evaluation words intuitively. In particular, the structure of the subjective evaluation for 3D shapes and the reliability of the ev...

The visual expression of a surface quality of human skin is required in a wide range of fields, such as in cosmetics industry. It is much harder, however, to generate intuitively and accurately a computer graphics (CG) image of human skin that has a desired impression without professional knowledge and skills because of its complex physical propert...

The platform of personal fabrication is developed by technologies such as 3D printing. However, most people do not have enough professional knowledge or skills to design these products. One promising approach involves relating subjective impressions to physical parameters in order to support intuitive design. This study aimed to build a model that...

In recent years, there has been concern about collision accidents involving vehicles driving at nighttime. In order to prevent such accidents from occurring, it is necessary to develop tail lamps with high visibility. In our study, we examined how differences in tail lamp design affect visibility with a view to developing a tail lamp design that of...

Pearls have attracted attention for their elegant beauty. The unique luster of pearls is the result of complex optical phenomena caused by their multilayer structure which creates a lustrous appearance. Our aim was to apply the same lustrous effect to base makeup products. We conducted research on the influence of the optical phenomena of pearls em...

Realistic and interactively generated computer graphics are needed in various fields, such as for CGI-animated movie and in education. To express the realistic appearance of various materials, it is important to represent the specific optical properties for each material.

To represent the texture of woven fabrics in computer graphics (CG), it is important to reveal the relation between their physical properties and the texture caused by them. For efficient representation of a realistic texture, a new layered model that links visual impressions with physical properties is required. Physical properties of woven fabric...

As the recent improvements in appearance rendering capabilities of computer graphics(CG), CG technologies are widely applied to various field. In this research, we intend to generate high quality CG of woven cloth, and focus attention on fluorescence and transparent characteristics. First of all, we measure excitation spectra, fluorescence spectra...

Short summary Pearls have long attracted attention for their elegant beauty. In this study, we attempt to formulate a base makeup that gives a pearl-like luster to human face. Applying an optical property of pearls called "blurring" to face images reproduced in three-dimensional computer graphics (3DCG) increased the visual appeal. Therefore, in th...

This study examined the psychological relaxation effects of micro-bubble bathing by employing psychological approach. Normal and two micro-bubble baths were compared in terms of their psychological effects; these were measured by subjective ratings. Using a subjective rating scale that consisted of multiple rating items, an investigation was carrie...

We are promoting research into the analysis and CG expression of realistic and natural piano-playing. This paper proposes a system that automatically generates an interactive animation of a pianist playing the piano from a musical score in real-time. In the first step, a generation of realistic piano performance animation from a musical score, this...

Recently, the number of emergency vehicles equipped with light-emitting diode (LED) warning lights has increased. Unlike traditional beanie lights, LED warning lights can display various flickering patterns because these patterns are controlled by computers. The purpose of this study was to develop flickering patterns that had a high level of visib...

The need for rendering woven fabrics arises frequently in computer graphics. Woven fabrics have a specific appearance, sheen, and transparency. A BRDF (bidirectional reflectance distribution function)/BTDF(bidirectional transmittance distribution function) model is well known as the basic technology for expressing the appearance of woven fabric. In...

Pearls have attracted attention because of their elegant beauty. In this study, we propose applying the luster of pearls to cosmetic products. We conducted research on the influence of the optical phenomena of pearls embodied on a human face using a three-dimensional computer graphic (3DCG) simulation. The unique luster of pearls is the result of a...

Woven fabric is frequently used in computer graphics. To express the realistic appearance of a woven fabric, it is important to represent its luster, transparency, and motion. In our previous study, we proposed a physically based BTDF model of woven cloth [Nomura et al. 2011] and a method of estimating the motion properties of woven cloth from subj...

In the area of materials development, preproduction using visual simulation has come to be considered essential. In this paper, we propose a simulation of pearl optical phenomena for cosmetic preproduction. Pearls manifest a very specific optical phenomenon caused by their multilayered thin-film structure, and most people have a common sense that p...

The need for rendering woven fabrics arises frequently in computer graphics. Woven fabrics have a specific appearance , luster, and transparency. A BRDF model is well known as the basic technology employed for expressing the appearance of a woven fabric. In order to represent the transparency of a woven fabric, a BTDF (bidirectional transmittance d...

抄録 Light-emitting diode (LED) lights are expected to improve the visibility of emergency vehicles. We propose a two-stage method for evaluating the flash patterns of LED warning lights. In the first stage, we identify the visibility of many kinds of flash patterns using the mental measure of “distinctness” from Scheffe's paired comparison. In the s...

Visual simulation using computer graphics and virtual reality has come to be used recently in the production process to enhance the quality of materials and products. In this paper, we propose a simulation of multilayer thin-film interference for pearl material preproduction such as cosmetic development. Pearls manifest a very specific optical phen...

This study assesses how people interpret human ages based on images of faces. We assigned the age of the people imagining how old they are as the “subjective age” and proposed an experiment to identify its mechanism. The participants in the experiment were presented with the facial images of other people and asked to estimate the ages of those in t...

In our lives, we look at a specific object mainly in central vision and peripheral vision is an auxiliary. However, peripheral vision has some outstanding features such as sensitiveness to light-dark change and moving target. In recent years, these features are focused on some fields such as sports vision and visual inspection, and many application...

The chord, along with melody and rhythm, is one of the important elements in constituting music, but the cause of music's psychological effects are, for the most part, yet to be clarified. There are previous studies that define chord characters on the basis of the levels of dissonance, tension and modality, but there is not enough research to discu...

The chord, along with melody and rhythm, is one of the important elements in constituting music, but the cause of music's psychological effects are, for the most part, yet to be clarified. There are previous studies that define chord characters on the basis of the levels of dissonance, tension and modality, but there is not enough research to discu...

In this study, we focused on the basic taste stimulation for the analysis of real facial expressions. We considered that the expressions caused by taste stimulation were unaffected by individuality or emotion, that is, such expressions were involuntary. We analyzed the movement of facial muscles by taste stimulation and compared real expressions wi...

In this study, we are concerned with calligraphy education support system. In current calligraphy education in Japan, teachers evaluate character written by students and they teach correct writing process based on the evaluation of the written character. Professionals in calligraphy can estimate writing process of character and balance of character...

In recent years, accidents of factories especially nuclear power plants by human errors and natural disaster by tsunami and earthquake has been happened so many times. Therefore, much research on computer warning systems at these various disasters has been done. Actually, these damages are decreased by these warning system. So it can be said that t...

In this research, we paid attention to calligraphy education. In current calligraphy education in Japan, teachers evaluate character written by students and they teaches based on the written character. Professional in calligraphy can estimate writing process and balance of character which are important points for evaluation from written character b...