Projects

NAP2023
Microtonal Music Dataset

Tatsunori Hirai, Lamo Nagasaka,Takuya Kato
CMMR 2023

We have constructed a dataset consisting of 100 manually created microtonal music tracks. It is intended for use in research purposes.
[Project page]
NAP2023
Create Music with Your Own Generative Model

Tatsunori Hirai
Neural Audio Plugin Competition 2023

This is a VST plugin utilizing deep generative models. This plugin suggests continuations of melodies as users input them on the piano roll. The suggestions are based on a deep learning model constructed with the user's input data as training data.
[YouTube], [GitHub]
QuantumMusic
Melody Generation with Quantum Computing

Tatsunori Hirai
CMMR 2023

In this study, we propose a method for the automatic design of quantum circuits for melody generation using quantum computers. We successfully created quantum circuits that realize note transitions of the melody serving as teacher data by utilizing a genetic algorithm.
ExtendedPianoRoll
Redesigning a Piano Roll: A Microtonal Piano Roll with a Temperament Design Interface

Tatsunori Hirai
SMC 2022

In this study, we have expanded the capabilities of the piano roll, which until now could only accept input of notes in the 12-tone equal temperament. It now allows for the input of melodies using notes from any temperament, including microtones. Accompanying this, we have implemented an interface that enables users to design their own original temperaments. We propose features such as the automatic generation of temperaments using frequencies contained in specific sounds, such as bird songs.
[YouTube], [Paper PDF]
Melody2Vec
Melody2Vec: Distributed Representations of Melodic Phrases based on Melody Segmentation

Tatsunori Hirai, Shun Sawada
JIP (2019)

In this study, we propose a technique for distributed representation (vectorization) to handle musical melodies numerically on a computer. In order to apply Word2vec, a distributed representation technique for words, to musical melodies, we suggest a method for dividing musical melodies into words based on a rule called GPT, and a modeling technique using this method.
[Paper PDF]
MusicMixer
MusicMixer: Computer-Aided DJ System based on an Automatic Music Mixing

Tatsunori Hirai, Hironori Doi, Shigeo Morishima
JIP (2018), ACE2015, MMM2016

In this project, we focus on the typical DJ technique of smoothly transitioning between tracks, known as "mixing." We propose an automation system for this technique and a support system for DJ performances utilizing it.
[Paper PDF]
Video
Frame-Wise Video Summarization and Stretching

Tatsunori Hirai, Shigeo Morishima
JOGMS (2018), MMM2016

In this project, we focus on the redundancy and continuity of video audio and visuals. We propose a method to expand or shrink the length of a video by selectively thinning out and inserting frames. With this approach, viewing time, which traditionally had to be adjusted to the length of the video, can now be adapted to the viewer's available time, making it possible to enjoy the video in a more flexible manner.
[PDF]
SeamlessVideoTransition
Seamless Video Scene Transition Using Hierarchical Graph Cuts

Tatsunori Hirai
SIGGRAPH Asia 2017 (poster), VC Symposium 2017

In this research, we propose a technique for transitioning as seamlessly as possible between two video scenes shot in the same location. By using a hierarchical graph cut, we have achieved a method to transition scenes at the pixel level for each frame of the video.
VRMixer
VRMixer: Mixing video and real world

Tatsunori Hirai, Satoshi Nakamura, Tsubasa Yumura, Shigeo Morishima
ACE2014 [PDF]
In this project, we propose new ways of viewing and generating content by blending the worlds within video content with the real world. For example, this allows for possibilities such as dancing with characters in a video or stepping into a film to practice acting.
MusicMean
Development of Average-Song Generator

Tatsunori Hirai, Shoto Sasaki, Shigeo Morishima
SMC2015, IPA MITOH Program 2012, WISS2013

In this project, we have developed a system to create a composite song by blending multiple tracks together. This system aims to enable a society of user-generated content where even general listeners without songwriting experience can create new songs suited to their preferences, in continuation with their music-listening activities.
FacialTemporalContinuum
Automatic Video Annotation based on Face Recoganization and Singing Scene Detection

Tatsunori Hirai, Tomoyasu Nakano, Masataka Goto, Shigeo Morishima
Journal on ITE (2012), SIGMUS94 (2012), etc.

In this study, we proposed a facial recognition technique that leverages the characteristics of video content and achieved the extraction of the same individual from multiple videos. By combining singing scene estimation technology (acoustic signal processing), we proposed a method for extracting singing individuals within video content. Based on facial images labeled with names, we are automatically annotating video content with people's names.

MuVieS
Automatic Music Video Generation System Considering Synchronization between Music and Video

Tatsunori Hirai, Hayato Ohya, Shigeo Morishima
Transactions of IPSJ (2013), SIGGRAPH2012 (Poster) [PDF],VC/GCAD Symposium 2012, etc.
This system generates new music videos by automatically cutting and pasting footage from a video database to match an inputted music. This system aims to assist users with no video editing experience in easily creating new music video content. By doing so, it helps push forward the first step towards making everyone a creator.





























































































Projects (as a co-worker)

hattori2020
Inside-out Tracking Controller for VR/AR HMD using Image Recognition with Smartphones

Keisuke Hattori, Tatsunori Hirai
SIGGRAPH2020 (Poster), VC symposium 2020
hattori2019
An Intuitive and Educational Programming Tool with Tangible Blocks and AR

Keisuke Hattori, Tatsunori Hirai
SIGGRAPH2019 (Poster), VC symposium 2019,etc.
akahori
Dynamic Subtitle Placement Considering the Region of Interest and Speaker Location

Wataru Akahori, Tatsunori Hirai, Shunya Kawamura, Shigeo Morishima
VISIGRAPP 2017, TVX 2016, etc.
sato
A Music Video Authoring System Synchronizing Climax of Video Clips and Music via Rearrangement of Musical Bars

Haruki Sato, Tatsunori Hirai, Tomoyasu Nakano, Masataka Goto, Shigeo Morishima
ICME2016 (Oral), SIGGRAPH2015 (Poster), VC/GCAD symposium 2015,etc.
quasi
Quasi-3D Rotation for Hand-drawn Characters

Chie Furusawa, Tsukasa Fukusato, Narumi Okada, Tatsunori Hirai, Shigeo Morishima
SIGGRAPH2014 (Poster) [PDF],VC/GCAD symposium 2014,etc.
videosummarization
A System for Viewing Racquet Sports Video with Automatic Summarization Focusing on Rally Scene

Shunya Kawamura, Tsukasa Fukusato, Tatsunori Hirai, Shigeo Morishima
IVAPP2016, Transactions of IPSJ (2015), SIGGRAPH2014 (Poster) [PDF],VC/GCAD symposium 2014,etc.
manga
Automatic Comic-Style Video Summarization of Anime Films by Key-frame Detection

Tsukasa Fukusato, Tatsunori Hirai, Hayato Ohya, Shigeo Morishima
MMM2016, Journal of IIEEJ (2013), Expressive2013 (Poster) [PDF],VC/GCAD symposium 2013,etc.
recomusi
Affective Music Recommendation System Reflecting the Mood of Input Image

Shoto Sasaki, Tatsunori Hirai, Hayato Ohya, Shigeo Morishima
SIGGRAPH2013 (Poster) [PDF],Culture and Computing 2013 [PDF],VC/GCAD symposium 2013,etc.