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Predecessor
39.17
Displaying 1-16 of 16 articles from this issue
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Article type: Cover
Pages Cover1-
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (11K) -
Article type: Index
Pages Toc1-
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (52K) -
Natsumi MINAMITANI, Vu Truong Son Dao, Kazuhiro SHIMONOMURA, Takeharu ...Article type: Article
Session ID: IST2015-24
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA simulation study is presented to investigate the avalanche multiplication effect on the performance of ultra-high speed backside illuminated (BSI) image sensor. We employ the full-band Monte simulation method for Si to simulate the trajectories of photoelectrons until they reach to the charge collection gate. Avalanche multiplication processes are simulated in the high-field region inserted in the device, and then we discuss the trade-off relationship between the multiplication factor and the electron transit time variation, which ultimately limits the frame rate of the image sensor.View full abstractDownload PDF (562K) -
Kuniyuki Kugenuma, Takashi Komuro, Bo Zhang, Keiichiro Kagawa, Shoji K ...Article type: Article
Session ID: IST2015-25
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn this study, we estimated the depth map from low SNR images captured by the multi-aperture camera system that placed CMOS image sensors in a two dimensional array to synthesize the images with disparity compensation. In general stereo matching, correspondence mismatch occurs in a textureless area. Therefore, we employed a global estimation using a probabilistic graphical model. By solving a maximum posterior problem using belief propagation, we confirmed that it is possible to estimate a depth map even from images under low illumination.View full abstractDownload PDF (15826K) -
Ryo HASEGAWA, Keita YASUTOMI, Hiroki KAMEHAMA, Sumeet Shrestha, Hyungj ...Article type: Article
Session ID: IST2015-26
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper proposes a lock-in pixel using a fully-depleted SOI pixel structure, which has high sensitivity for near-infrared light. The fully depleted structure also enables the high-speed detection and modulation of careers generated by near infrared light. In this paper, simulation results with a device simulator and preliminary evaluation results of the test chip are shown.View full abstractDownload PDF (480K) -
Trang HANH, Taichi KASUGAI, Sangman HAN, De Xing LIOE, Keita YASUTOMI, ...Article type: Article
Session ID: IST2015-27
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn this paper, we will discuss about a 3 taps lock-in pixel with the structure of a lateral electric field modulation (LEFM). A large-area high-speed photodiode for charge transfer is utilized to reduce the power consumption of a semiconductor integrated circuit and the dark current arising from the multiple connections of floating diffusions. The Simulation results of the charge transfer behaviors of the 3 taps lock-in pixel will be presented.View full abstractDownload PDF (502K) -
Hiroki YAMASHITA, Dasisuke SUGIMURA, Takayuki HAMAMOTOArticle type: Article
Session ID: IST2015-28
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn low light scene, heavy noise deteriorates the quality of captured color images. In this paper, we propose a method for enhancing color images of low light scene using near-infrared (NIR) information. We make use of a single sensor that captures red, green, blue (RGB) and NIR information. Using RGB and NIR information captured by our sensor, we reconstruct clear color images by performing a joint demosaicking and denoisig scheme. Experimental results show the effectiveness of our method.View full abstractDownload PDF (7402K) -
Atsushi IWATA, Keiichiro KAGAWA, Shoji KAWAHITO, Chizuko OGATA, JUN Ta ...Article type: Article
Session ID: IST2015-29
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIt is said that 80% of the Japanese are affected with Periodontal Diseases. Its examination is usually done in a qualitative way, and not only time consuming but depended on the doctor's skills. Therefore, a quantitative and quick technique easily applied to a group examination, where a doctor sees many patients for a short time, is required. We have been developing a compact imaging device called a digital dental mirror for capturing three-dimensional shape of gums and images of oxygen saturation, total hemoglobin and alveolar mucosa's border in a quantitative way. In this report, we measured a three-dimensional shape of stocked cork boards by using the multiple-baseline stereo method as a preliminary experiment.View full abstractDownload PDF (4643K) -
Suguru KOBAYASHI, Hiroshi OOTAKE, Takayuki HAMAMOTOArticle type: Article
Session ID: IST2015-30
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn this paper, we propose a layered structured imaging with arrayed multicolor organic film and crystalline selenium film. A specific wavelength is converted by the organic film, and another wavelength through the organic film is converted by the crystalline selenium film. By adding the signal values in the stacking direction, it is possible to obtain the luminance signal in the entire image. Referring to the gradient information of the luminance image, signal values can be demosaicked highly accurately. Furthermore, we reconstruct the RGB image and multispectral image from the demosaicked image. And, we show the effectiveness of the proposed imaging by simulation.View full abstractDownload PDF (6431K) -
Keita SOBUE, Min-Woong SEO, Masatsugu NIWAYAMA, Keiichiro KAGAWA, Keit ...Article type: Article
Session ID: IST2015-31
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have been developing a time-resolved image sensor with lock-in pixels which uses a lateral electric field charge modulator (LEFM) for high speed modulation. This image sensor can measure the time response of the Nano second order of the repetitive phenomenon by the resolution of tens of pico seconds. In the paper is applied to the time-resolved NIRS (near-infrared spectroscopy) measurement the time-resolved image sensor. The time-resolved NIRS measurement is reported for the fundamental testing of the time-resolved image sensor.View full abstractDownload PDF (3786K) -
Toshikazu KAWAMURA, Tomohiro HIRAI, Hiroaki TAKEHARA, Toshihiko NODA, ...Article type: Article
Session ID: IST2015-32
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe are developing an implantable glucose sensor with a long lifetime. Recently, glucose-responsive fluorescent hydrogel whose fluorescent intensity depends on the glucose concentration was developed. We develop an implantable glucose sensor combining the hydrogel with an implantable CMOS sensor. In this work, response time was improved by an optimization of the device structure. The fabricated glucose sensor was evaluated in in vitro and in vivo experiments. An improved response performance of the sensor was confirmed.View full abstractDownload PDF (4404K) -
Rihito KURODA, Toshiki OBARA, Tetsuya GOTO, Naoya AKAGAWA, Daiki KIMOT ...Article type: Article
Session ID: IST2015-33
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe atomically flattening technology of gate insulator film/Si interface has been successfully introduced into 0.22 μm CMOS technology with shallow trench isolation process. A reduction of random telegraph noise (RTN) due to the introduction of atomically flat gate insulator/Si interface was confirmed by the measured data from over one million MOSFETs using fabricated array test circuit. The effect of RTN reduction by atomically flat gate insulator film/Si interface is reported.View full abstractDownload PDF (8304K) -
Keiichiro KAGAWAArticle type: Article
Session ID: IST2015-34
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIf we give the name, camera, to the systems that observe two or higher dimensional optical information, a variety of systems can be categorized as camera. If we give the name, image sensor, to the devices that convert two or higher dimensional optical information to electric signals, a variety of image sensors can be. Apart from seeing like human beings, a concept of new camera system is created. Then, we notice that there is no device that can implement the camera in the world. Therefore, I create a new image sensor, and build a new camera system based on that.View full abstractDownload PDF (4699K) -
Article type: Appendix
Pages App1-
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K) -
Article type: Appendix
Pages App2-
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K) -
Article type: Appendix
Pages App3-
Published: May 01, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K)
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