Faculty Profiles - HARADA Toshinobu

Published Papers - HARADA Toshinobu

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Clarification of the Causes of the Unaesthetic Curved Surface Generation Based on Analyses of the Curves on Specular Reflected Images

Hirano Ryo, Harada Toshinobu, Inoue Jiro

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 61 ( 4 ) 4_85 - 4_94 2014 [Refereed]

In evaluation process of industrial products, designers evaluate curved surfaces using the specular reflected images on curved surfaces. However, designers have not been able to clarify control parameters' values that generate the intended specular reflected image before its modeling. Accordingly, designers have to search the curved surface generate's intended specular reflected image by adjusting roundness and torsion of the curved surface gradually using their intuition and experience.<br> Therefore, in this study, we analyzed relations between log-aesthetic curved surfaces generated by 256 types of combinations of control parameters' values and specular reflected images and bewtween seven eye positions and specular reflected images. As a result, we clarified the control parameters' values and eye positions that generated unaesthetic curved surface among log-aesthetic curved surfaces.

Proposal of Design Indexes in Pictograms Using Dynamic Expression

OONO Shintaro, HARADA Toshinobu, MUNEMORI Jun

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 60 ( 1 ) 95 - 102 2013.05 [Refereed]

Pictograms are signs which convey meanings without using characters. They attract attention in supporting the non-verbal communication. However, there are few studies which analyzed the design. Therefore, designers must create them intuitively. In our previous study, we proposed the design indexes for "static pictograms" conveying meanings of verbs and verified its usefulness. As a result, we clarified that a limit was shown in expressing the pictograms of some verbs only with still pictures.Then, this study proposes the design indexes and the design method of the "dynamic pictograms" conveying meanings of verbs. Concretely, we analyzed intelligibility of the existing pictograms of 100 verbs through the questionnaire to 80 persons. On the basis of this result, we proposed the design indexes for the dynamic pictograms and verified its usefulness. Moreover, taking the result of our previous study into consideration, we proposed the design method for the dynamic pictograms and verified its usefulness.

Analyses of the Characteristics of Japanese External Noses' Curves and Creating Templates for the Plastic Surgical Reconstruction

HARADA Toshinobu, SATO Akira, YAMADA Akira

Transactions of Japan Society of Kansei Engineering ( Japan Society of Kansei Engineering ) 12 ( 4 ) 471 - 480 2013 [Refereed]

Plastic surgeons create of external noses based on their <i>kansei</i>. The outcome of the rhinoplasty depends on the surgeons' technique and artistic sense. We consider that reconstructing an external nose by using a template would solve the inconsistency of the outcome. However, there are few studies about curves of outlines of external noses. Thus, the aims of our study were to analyze curves of outlines of external noses of 84 normal subjects and to classify the curves in order to create templates as a guide for total nasal reconstruction. Concretely, we took photographs of 84 subjects' external noses and abstracted the curves of their profile outlines of external noses from the photographs by image processing. Next, we analyzed characteristics of the curves by using those profiles of curvature and classified the curves into 5 types of curves. Lastly we made innovative 380 (= 5 types × 76 sizes) nose templates based on our study in order to express the individual subtle differences of the reconstructed new nose.

A Study of Simulating Log-aesthetic Curved Surfaces under Various Light Source Environments with Augmented Reality

平野亮, 原田利宣, 床井浩平

情報処理学会論文誌 ( 情報処理学会 ) 53 ( 8 ) 2028 - 2035 2012.08 [Refereed]

In this study, we developed a simulation system that reproduced the light source environment in a real world with Augmented Reality, and simulated log-aesthetic curved surfaces in the system. Concretely, this system renders the curved surfaces using the result of spherical harmonics analysis of the light source environment image that is reflected on the metallic hemisphere in order to reproduce the diffuse reflection of the curved surface. Moreover, we experimented in the impression evaluation of the curved surfaces under various environments (fine, cloudy, and evening sun, etc.) with the developed systems and clarified the influence of the light source environment to the impression of curved surfaces.

日本人の人中形態の曲線分析

山田朗, 上田晃一, 秋山伸子, 原田利宣

日本口蓋裂学会雑誌 ( (一社)日本口蓋裂学会 ) 37 ( 2 ) 130 - 130 2012.04 [Refereed]

【日常形成外科診療における私の工夫-術前・術中編-】術中の工夫(アイディア) 小耳症における全耳介再建術の工夫

山田朗, 上田晃一, 原田利宣

PEPARS ( (株)全日本病院出版会 ) 0 ( 63 ) 77 - 94 2012.03 [Refereed]

小耳症に対する耳介再建術は、適切な訓練を積めば、造形的な楽しみを純粋に享受できる手術である。いわゆる造形との違いは、限られた肋軟骨量、限られた皮膚の表面積の中で形態を出すことが要求されることで、症例ごとの術前の詳細な評価、手術計画が成功の鍵を握る。全耳介再建の目標は、他人から、手術で作った耳と気付かれない自然な耳介を作ることにある。と筆者は考える。その意味で術後に、女性の自由なヘアスタイルを可能にする耳介は成功と言ってよい。耳介は顔面中央に位置する目、鼻、口唇(facial triangle)とは違い、他人の注意を引く部位には存在せず、Face maskのすぐ後ろに位置している。したがって、注意深い耳介の位置決めは、自然で作ったと気付かれないような、目立たない耳介再建を行う上で、極めて重要である。(著者抄録)

Decision Rule Visualization System for Knowledge Discovery by Means of the Rough Set Approach

OHKI Motoyuki, HARADA Toshinobu, INUIGUCHI Masahiro

Journal of Japan Society for Fuzzy Theory and Intelligent Informatics ( Japan Society for Fuzzy Theory and Intelligent Informatics ) 24 ( 2 ) 660 - 670 2012

Recently, the applications of rough set theory to real problems have been studied actively. However, when the number of induced decision rules by rough set approach is large, finding useful decision rules becomes often a formidable task. This fact may become a bottlenek in actual use of induced decision rules. In this study, we develop the decision rule visualization system for supporting the discovery of useful decision rules. The system visualizes decision rules having same conclusions in three-dimensional space using co-occurrence rates between atomic formulae and conclusions, those between atomic formulae and Hayashi's quantification method IV. An evaluation experiment is conducted. The results show that useful decision rules are discovered efficiently from many decision rules induced by the rough set approach. Some additional functions are implemented to the system in order to overcome the problems pointed out by examinees.

Development of the Product Recommendation System by Using Fuzzy AHP

INOUE Hiroko, HARADA Toshinobu

Transactions of Japan Society of Kansei Engineering ( Japan Society of Kansei Engineering ) 11 ( 2 ) 255 - 263 2012 [Refereed]

Recently, recommendation systems and user reviews have attracted attention as aids in searching for desired products by using web information on the products. However, existing recommendation systems require analyzing a user's activity on the web and collecting information from many reviews. Therefore, in this study, we aimed to develop a product recommendation system that does not have these requirements. We used digital cameras and earphones as case studies and, on the basis of perception-of-value information obtained from questionnaires to users, we applied an analytic hierarchy process (AHP) to an analysis and calculated the degree-of-importance values of the evaluation items for each product. We then calculated the product evaluation values of each evaluation item by using user evaluations of products acquired from Kakaku.com Application Program Interface (API). We developed a system that decides the recommendation order of each product by multiplying the degree-of-importance values and evaluation values together by Fuzzy AHP.

Aesthetic curve analysis of the normal auricle: development of normal ear templates and its clinical application for total auricular reconstruction

山田朗, 原田利宣, 上田晃一

Japanese journal of plastic surgery ( 克誠堂出版 ) 54 ( 3 ) 251 - 259 2011.03 [Refereed]

Decision rule visualization for knowledge discovery by means of rough set approach.

Motoyuki Ohki, Masahiro Inuiguchi, Toshinobu Harada

2011 IEEE International Conference on Granular Computing(GrC) ( IEEE Computer Society ) 502 - 507 2011 [Refereed]

Pictogram Design Support System Based on Information Analysis of "Verbs"

Oono Shintaro, Harada Toshinobu, Munemori Jun

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 58 ( 2 ) 55 - 64 2011 [Refereed]

In the spread of universal design, the necessity of pictograms rises as tools for the nonverbal communication. However, there are few studies developing the guides for designing the pictograms. Then, we aimed to develop the guides for designing the pictograms and a support system by using the guides. Concretely, we extracted key elements for twenty "verbs" selected and considered what kind of elements constructed the images of the "verbs". Next, we calculated information entropy of each "verbs" by using the probability of the presentment of the elements and classified the "verbs" into three types by the difference of the graphs of the information entropy. We developed the guides for designing the pictograms by considering the kinds of the elements and the types of the graphs. Furthermore, we developed the design support system using the guides and confirmed the availability of the system.

Analysis of the Characteristics of External Ears' Curves and the Development of the Templates

Harada Toshinobu, Yamada Akira, Sato Akira, Tomita Ikunari

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 57 ( 5 ) 21 - 26 2011 [Refereed]

Plastic surgeons create frame-works of external ears based on their kansei. The performances of the frame-works differ widely by surgeons' technique and artistic sense. Although the outcome of Yanada's external ear reconstruction using a single ear template is stable, it is too difficult to apply a single type of template to express the individual variations of patients' external ears. Thus, the aims of our study were to analyze curves of outlines of helix and antihelices of 50 normal subjects and to classify the curves in order to create templates as a guide for total ear reconstruction. Concretely, we took photographs of 50 subjects' external ears and abstracted the curves of their helix and antihelices from the photographs by image processing. Next, we analyzed characteristics of the curves by using those profiles of curvature and classified the curves into 3 types of curves in helix and 2 types of curves in antihelices. Lastly we made innovative 90(= 3 types*2 types*15 sizes) ear templates based on our study in order to express the individual subtle differences of the reconstructed new ear.

Development of a Support System for Making Design Concepts by Using Images in Web and Kansei Words

Harada Toshinobu, Miyao Kazuki

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 56 ( 6 ) 67 - 76 2010 [Refereed]

Design works contain not only the visual imaging phases but also the design concept making phases. Designers spend a lot of hours in making the design concepts that are important for designing efficiently. However, there are few systems for supporting the design works. Then, we aimed the development of a supporting system for making positioning maps of existing products in the early concept making phase. Actually, we developed the system that collected images of existing products in Web with the products' keywords and target kansei words. Next, we developed the system that applied PCA to analyze the collected images and showed the positioning maps of existing products to designers. Furthermore, we evaluated the availability of the system's functions for collecting URL of the images and kansei words. As a result, we clarified that the accuracy of image retrieval varied widely by combinations of products' keywords and kansei words. And, we surveyed the usability of the system by four subjects who experienced making the positioning maps, and improved the interface.

Proposal of an Analysis Method of Characteristics of Space Curves

Inoue Jiro, Harada Toshinobu, Imai Toshiyuki, Kojima Shiori

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 55 ( 5 ) 5_65 - 5_74 2009

<p>At present, in the field of industrial design, it is too difficult for designers to control keylines as they become aesthetic curves by using existing CAD systems. Therefore, modelers must finish the clay models which are shaved from the 3D data. However, the work needs a great deal of labor.<br> Then, the aims of this study were to propose of an analysis system of space curves and to clarify characteristics of aesthetic space curves. Concretely, first, we developed the analysis system of space curves. Second, we made logarithmic curvature graphs and logarithmic torsion graphs from radii of curvature and radii of torsion of space curves in several expressions and products. And we clarified characteristics of these space curves. Third, we analyzed the lines of curvature of some curved surfaces by applying this system. As a result, we clarified characteristics of the lines of curvature defining the curved surfaces, the connection positions, and the combinations. </p>

Reconstruction of Rough Sketch by Connecting Visual Languages Aesthetically

Harada Toshinobu, Kono Masayuki

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 55 ( 5 ) 5_55 - 5_64 2009

<p>At present, when designers create the curves applied for shape design, they input the curves in their sketches to the computer. Next, they approximate the curves by using spline curves in CAD. Furthennore, they modify the curvature change and obtain the available curves for shape design. However, there are little systems supporting the operations efficiently. <br>Then, the aim of this study is to develop the system that can generate aesthetic curves from designers' sketches. First, we recognized the lines overlapped of the sketch as the figures and extracted "ToneMedian Lines (TMLs)" from them. Second, we divided TMLs into curves of monotone curvature and analyzed them. On the basis of these result, we replaced the curves with visual languages (VLs). Third, we placed VLs on their former positions and aesthetically connected them using knowledge got through analyses of mathematical expressions. As a result, we could obtain aesthetic curves from the sketches efficiently. </p>

Characteristics of Aesthetic Space Curves and Generation of the Space Curves

HARADA Toshinobu

Journal of Japan Society for Design Engineering ( 日本設計工学会 ) 43 ( 10 ) 537 - 543 2008.10 [Refereed]

Classification of SNS Web Sites and Construction of Prototype Based on Users' Sense of Values

Miyao Kazuki, Harada Toshinobu

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 55 ( 1 ) 81 - 90 2008 [Refereed]

Recentry, the number of users of social networking service sites (hereafter, SNS sites) is increasing quickly. However, many SNS sites emphasize the versatility of use, so many SNS sites are not always convenient for all users. Then, in this study, we clarified the relation between users' sense of values and functions of SNS sites, and aimed at developing some prototypes of optimum SNS sites for some users' sense of values. First, we classified 44 SNS sites operating in Japan into four clusters by quantification theory III and cluster analysis. Next, we conducted 101 subjects questionnaires about their purpose of use and impression of SNS sites, and evaluation questionnaires about nine samples of SNS sites made with design of experiment. In addition, we classified subjects by their purpose of use, and clarified the relationship between the purpose of use and the functions wanted by each subject cluster. As a result of verifying evaluations of SNS prototypes on the basis of the above result, we could show the possibility of controlling subject cluster's preference by optimization of function.

Thinning Method of Rough Sketch using Visual Language for Applying to a Plan

Kono Masayuki, Harada Toshinobu, Yoshimoto Fujiichi

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 55 ( 1 ) 47 - 54 2008 [Refereed]

Till now, when designers create curves used for shape design, they input a set of points that compose curves in these sketches to a computer first. Next, the set of points is approximated using a spline curve in CAD. They correct the radius of curvature of the spline curve. However, there are few systems supporting the operations efficiently. The aim of our study was development of a new system that made aesthetic curves from the plans sketched by designers. First, we recognized the overlapped lines of a sketch as a figure and extracted "Tone Median Line(TML)" from the figure. Second, we divided TML into curves of monotone curvature and analyzed them. On the basis of these results, we identified visual languages(VLs). Lastly, we replaced TMLs by VLs on former positions, and obtained aesthetic curves. As a result, we could generate aesthetic curves efficiently.

Reconsideration of an Aesthetic Curve for Designers

Harada Toshinobu

Bulletin of Japanese Society for the Science of Design ( Japanese Society for the Science of Design ) 55 ( 2 ) 75 - 82 2008 [Refereed]

Primarily, it is essential skill for designers to draw an aesthetic curve. However, even had designers drawn an aesthetic curve, they frequently got a curve having no impression intended by a limitations of tools and CAD systems when they drew a plan. Then, this paper explains our studies concerning "what are aesthetic curves for designers?", "How do we generate and use the curves?" for contributing as a reference for designers. Concretely, first, curve's departmental denominations, conventional curve generation methods and problems in the methods are explained. Second, an outline of a quantitative analysis method for the characteristics of a curve is shown. The results of analyzing a lot of curves in natural products etc. using the methods are explained. And, on the basis of the results, curve's visual languages (VLs) are generated. Third, a few instances applying these VLs to product designs are shown, the possibility of the design method using them are verified.

Industrial Design and Aesthetic Space Curves

HARADA Toshinobu

Journal of the Japan Society for Precision Engineering ( The Japan Society for Precision Engineering ) 73 ( 12 ) 1291 - 1294 2007.12 [Refereed] [Invited]

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