Engineering-Research-Activity2015｜SHINSHU UNIV.

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YamamotoLabYamamotoLab.isstudyingondevelopingalgorithmsforsecureandefficientsearchandXMLdata.Asecuresearchtechniqueisoneofthemostimportanttechnologiesincloudcomputingbecauseitcanpreserveaprivacyandsensitivedata.AlsoasearchtechniqueforXML(eXtensibleMarkupLanguage)dataisacriticalissuebecauseXMLisbecomingastandardlanguagesovertheInternet.Thereforeweaimatdevelopingefficientsearchalgorithmsfortheseissues.Inubiquitousnetworksociety,asecuresearchtechniqueforpreservingaprivacyandsensitivedataisoneofthemostimportanttechnologies.FurthermoreasearchtechniqueforXMLdataisalsoacriticaltechnology.YamamotoLab.isaimingatdevelopingnewmethodsfortheseissues.Hiroaki YamamotoProfessorIn 1988, he joined ShinshuUniversity. His research interests include pattern matching algorithms, automata theory, and information retrieval. GPU (Graphical Processing Unit): A GPU has many cores, and plays an important role in developing efficient algorithms.Study on Secure and efficient SearchesSearchable encryption system: A user sends an encrypted query to a server. The server searches for documents using the encrypted query.Studentsgetmainlyjobsrelatedtotheinformationtechnology.ComputerScience &EngineeringAfter GraduationIn the FutureShiraiLabDoyouhavearegrettableexperiencethatyourbestshotisactuallynotsogood?Inparticular,darkplacephotographingorbacklightphotographingaredifficultforus.However,thedifficultyofhardwarecanbeaddressedbysoftware.Forexample,Ifyoutakeanotherimageandmakeapairofflashandno-flashimages,youcanobtainanoise-lessandblur-lessclearimageusingarecentcomputationmethod.Ourlaboratorydevelopsmethodstoobtainmorenaturalandhighresolutionimageslikewearefeeling.Imageprocessing,especiallythecategoryofimagerestoration,stillhasamountainofproblemstoaddress.Forexample,deblurringofimagestakenwithhandheldcameraisstilldifficultone.However,iftheycanbesolved,wecanobtainmoreclearandhighresolutionimages.Inaddition,thebenefitsimprovetheaccuracyofitsapplicationfieldssuchasimagerecognitionforroboticsandsecuritysystem.KeiichiroShiraiAssistant Professorreceived the Ph.D. degree from Keio University in 2006. The research filed is multi-dimensional signal processing dealing with 2D image and 3D model.Denoisingby synthesizing textures of a flash image (left) and colors (also shadows) of a no-flash image (middle), and its output clear image (right).Image processingfor more clear image creationCreation of images based on human perceptual feeling. In an original image (left), the regions of photographic subjects (middle) are enhanced while other background regions are blurred.Mainlyimageprocessingisassociatedwithmakersproducingcameras,projectors,printers,andscanners.Thedemand,however,isspreadinginindustryalongwiththedemandsofimagerecognition.Ouralumniisnowactiveinelectronicsandcarmanufactures.ComputerScience &EngineeringAfter GraduationIn the Future60

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