Researcher Database

（Last updated : 2022-05-19 10:40:03）　

KUMAKI Takeshi

Department / Course College of Science and Engineering Department of Electronic and Computer Engineering

Title / Position Professor

Other Affiliations
1.	Research Organization of Science and Technology VLSI Center
2.	Graduate School of Science and Engineering

Academic background
1.	～2006/12	Doctoral Program (2nd Semester) │ Department of Semiconductor Electronics and Integration Science │ Graduate School of Advanced Sciences of Matter │ Hiroshima University │ Completed
2.	～2003/03	Doctoral Program (1st Semester) │ Mathematics and Computer Science Course │ Graduate School, Division of Science and Engineering │ National Defense Academy │ Completed
3.	2006/12 Degree Acquisition	│ Hiroshima University Ph.D. (Engineering)
4.	2003/09 Degree Acquisition	│ National Defense Academy M.E.
5.	～1998/03	Department of Mathematics and Physics │ Science and Engineering Major │ National Defense Academy │ Graduated

Business career
1.	2007/04	Researcher │ │

Committee and society
1.	2018/04	電子情報通信学会会誌編集委員会委員[A]
2.	2017/01	IEEE IEEE kansai section WIE secretary
3.	2014/01 ～ 2016/12	IEEE A-SSCC TPC SoC & signal processing sub-committee
4.	2011/01 ～ 2014/12	IEEE IEEE kansai section MDC secretary

Research activities
1.		Research Institute of Signal Processing (RISP)
2.		IEEJ
3.		The Institute of Electronics, Information and Communication Engineers (IEICE)
4.		The Institute of Electrical and Electronics Engineers (IEEE)

Subject of research
1.	Massive-paralle memory-embedded SIMD matrix processor
2.	Hardware Trojan implementation and its detection circuit
3.	LED illumination-based spy photo prevention system
4.	Hierarchical masked image filtering technology on security-camera privacy protection
5.	Max-plus algebra-based morphological wavelet transform watermarking
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Research summary
Study on LSIs for mobile equipment and its multi-media security application ☆Study for the development and application of ultra-parallel SIMD type arithmetic processors.☆ . Develop low power consumption SIMD type arithmetic processor for multimedia processing enabling a maximum of 2,048 data to be processed in parallel, for effective image, encryption, and detection processing studies. ☆ Studies for performance enhancements on associative memory and its application☆ . Propose and develop multiport associated memory to check database in parallel. Multiport associated memories have multiple I/O ports unlike normal associated memories, and is known to achieve high speed network routing. ☆ Development of hardware hacking proof secure LSI to prevent information leaks from Hardware Trojan Horse ☆ In recent years, there are concerns for circuits known as hardware Trojan horse (HTH) that are incorporated by the hands of LSI terrorists becoming a realistic threat. Currently, related studies are being conducted with the US in the center, but is still in its very early stages in Japan. In this study, surveys will be made on related status and research, a verification board shall be developed, to create an HTH that will be incorporated into triple DES and AES encryption circuit to check the damage caused by the invalidation of encryption process and the outflow of the private key. Furthermore, a circuit to monitor operations effectively on an architecture level will be developed. ☆ Development of layered type image masking technology for privacy protection from security cameras ☆ . Many security cameras are installed around us for crime prevention however, personal information such as the face of a person, is being shot without any notice, and the method of their handling largely remains unclear. In this study, the face, etc., of the individual in the shot image is automatically masked by a technology known as HMF developed to protect the information, while allowing the masking to be removed in accordance with the authorization granted to be viewer. ☆ Study for a digital watermarking technology for mobile equipment using morphological wavelet conversion.☆ Digital watermarking is a technology to incorporate information, such as copyrights, etc., into images. This study has developed a method to incorporate information swiftly and safely for mobile equipment based on morphological wavelet conversion. This technology is resistant to compression or cut-out attacks and is possible to process it at high speed. ☆ Study of image falsification detection technology using morphological pattern spectrum☆ Wile digital images are easy to handle, on the other hand, it can be easily falsified by others. This being the case, in many cases, its authenticity is contested in courts. In this study, a technology has been developed to detect minor falsifications while noise and rotation are not judged to be falsifications, and is aimed at closing the gap between falsification detection judged by human beings. ☆ Development of secret photography prevention technology using visual light communications and image sensor.☆ With the spread of mobile phone cameras, secret photography and digital shoplifting is becoming rampant. In this study, jamming technology using visual light communication and image processing is developed to prevent these kinds of damage. This will be used to identify the restricted area and to freely select the restriction functions to achieve much secure photography. ☆ Development of low power consumption sensor node GSSE mounted with infra-red array sensor and image sensor.☆ Mounting of image sensors was difficult for sensor nodes as low power consumption was required. In this study, a drastic reduction in power consumption has been achieved by allowing image to be acquired only when an event is detected by developing an effective person detection method by the addition of an infra-red sensor.

Research summary(Photo/Image)

Present specialized field
Fundamental Informatics, Software, Intelligent Informatics, Electric Power Engineering/Electric Equipment Engineering, Electron device/ Electronic equipment, Communication/ Network engineering, System Engineering, Computer System Network, Perception Information Processing/Intelligent Robotics (Keyword：matrix-processing architecture, SIMD, bit-serial and word-parallel, image processing, JPEG, cipher, cryptography, AES, face detection, Haar-like feature, AdaBoost, speech processing, voice recognition, Hash function, content addressable memory, CAM, cellar automaton, CA, multiport, Routing, FMCAM, Pseudo random number, security, Secure LSI, Hardware Trojan, Anti-hardware hacking LSI, LED, SEI, Plants factory, ultra sonic, bio-logging)

Papers
1.	2018/03	Morphological methods in image processing for embedded processors │ Journal of Signal Processing │ 22 (2),pp.25-45
2.	2017/10	Hierarchical-masked image filtering for privacy-protection │ IEICE Transactions on Information & Systems │ E100-D (10),pp.2327-2338
3.	2017/01	Secure data processing with massive-parallel SIMD matrix for embedded SoC in digital-convergence mobile devices │ IEEJ Transactions on Electrical and Electronic Engineering │ 12 (1),pp.96-104
4.	2016/11	Method of video transcoding from MPEG-2 to HEVC with picture structure information │ Journal of Signal Processing │ 20 (6),pp.283-290
5.	2016/07	FPGA implementation and evaluation of ternary content addressable memory with individuality, │ Journal of Signal Processing │ 20 (4),pp.137-140
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Academic conference presentation
1.	2020/10/11	Live demonstration: Development of LED-Based Stego-Panel for New smartphone Usage
2.	2020	A study on specific emitter identification method using allan variance
3.	2020	Development of flicker-noise-based lightiing communication mathod
4.	2020	Effectiveness of plant growth under 1/f fluctuation LED light based on photosynthetic photon flux density
5.	2020	Extraction of radio fingerprinting from software defined radio devices for development of specific emitter identification system
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Other research achievements
1.	2018/08	UDAYAVANI - KANNADA DAILY - MANIPAL

Winning science prize
1.	2012/09	情報ハインディング及びその評価委員会 3. 第1回電子透かしコンテスト認定方式
2.	2014/03	Proc. of International Conference on Advances in Engineering and Technology，Session Best Paper Certificate (Reset signal aware hardware Trojan trigger)
3.	2014/05	Journal of Signal Processing (Max-plus algebra-based morphological wavelet transform watermarking for highly-parallel processing with mobile embedded processor)
4.	2014/05	IEEE SSCS Kansai chapter IEEE SSCS Kansai Chapter Academic Research Award (可視光ビーコンを利用した犯罪防止システムの実装及び評価)
5.	2015/03	Nonlinear circuits, Communications and Signal Processing (NCSP) 2015，Student Paper Award (Human-like image manipulation detection using morphological pattern spectrum)
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Acquisition patent
1.	2009/12	Compression processing apparatus and compression processing method （PCT/JP2008/002065）
2.	2017/02	Light emission control system, light emission control unit, light emission control method, and light emission control program （PCT/JP2017/007446）