All issues
Predecessor
40.40 Information Sensing Technologies(IST)
Displaying 1-23 of 23 articles from this issue
- |<
- <
- 1
- >
- >|
-
Pages Cover1-
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (136K) -
Pages Cover2-
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (76K) -
Takuya Yoda, Hajime Nagahara, Rin-ichiro Taniguchi, Keiichiro Kaga ...Session ID: IST2016-48
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSPhotometric stereo enables the estimation of surface normals from images that were captured using different known lighting directions. The classical photometric stereo method requires at least three images to determine the normals of a given scene. This method therefore cannot be applied to a dynamic scene, because it is assumed that the scene should remain static while the required images are captured. We present a dynamic photometric stereo method to estimate the surface normals in a dynamic scene. We use a multi-tap CMOS image sensor to capture the input images for the photometric stereo method. The image sensor can divide the electrons from the photodiode of a single pixel into different taps of exposures, and can therefore capture multiple images under different lighting conditions with almost the same timing. We implemented a prototype camera that was synchronized with a lighting system, and subsequently realized photometric stereo of a dynamic scene.View full abstractDownload PDF (618K) -
Kuniyuki Kugenuma, Takashi Komuro, Bo Zhang, Keiichiro Kagawa, Sho ...Session ID: IST2016-49
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSIn this study, we propose a method for estimating a depth map from images captured by the multi-aperture camera, which places CMOS image sensors and lenses in a two dimensional array. By employing a global estimation method, we succeeded in estimating a depth map even from noisy images which are captured in a low light condition. We also succeeded in obtaining an improved quality image by synthesizing the multi-aperture images with disparity compensation.View full abstractDownload PDF (640K) -
Biay-Cheng Hseih, Khoi Le, Keith Honea, Sami Khawam, Hasib Siddiq ...Session ID: IST2016-50
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSCurrent camera systems present a huge image signal processing (ISP) programmable limitation, since the ISP algorithm is mainly hard-coded via Application Processor. We'll present the prototype development result of a Re-Configurable Instruction Cell Array (RICA), a real time, low power reprogrammable ISP engine stacked with 8MP detector array fabricated in 40nm BSI CMOS imager technology. We believe this RICA stacked image sensor technology presents an efficient programmability solution to support adjacent IOT markets, and next generation computational camera technologies.View full abstractDownload PDF (272K) -
Yusuke Nakamura, Takeshi Shimano, Kazuyuki Tajima, Mayu Sao, Taku ...Session ID: IST2016-51
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSAttractive revolutions of imaging technologies, such as Light Field Camera and Lensless Camera, are expected to innovate various imaging applications. We propose another technology to realize a lensless light-field imaging method. The device consists of an image sensor and a Fresnel zone aperture (FZA) slightly separated in a few millimeter spacing. Synthesized shadows of it with the incident light are detected and generate moiré fringes interfering with another virtual FZA in a computer. Images are reconstructed by FFT of the fringes. Re-focusing is available by changing the size of the virtual FZA. We experimentally confirmed feasibility of the method by using a prototype which can reconstruct image at over 30 fps.View full abstractDownload PDF (574K) -
Toshiki Sonoda, Hajime Nagahara, Kenta Endo, Yukinobu Sugiyama, Ri ...Session ID: IST2016-52
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSRecent studies based on the concept of compressive sensing have been realized scene capture beyond the trade-off limit between spatial resolution and temporal resolution, but the feasibility is low. We proposed co-designed CMOS sensor architecture and its controlling method that performs high-speed imaging with sufficient feasibility. We fabricated a prototype camera and demonstrated the realization.View full abstractDownload PDF (640K) -
Zhonghui Liu, Min-Woong Seo, Masatsugu Niwayama, Keiichiro Kagawa, ...Session ID: IST2016-53
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSA CMOS lock-in pixel image sensor with lateral electric field charge modulation (LEFM) is used for time-resolved NIRS (near-infrared spectroscopy) measurement. The developed imager with LEFM achieves a very high time-resolution of tens of picoseconds and a very short intrinsic response time of hundreds of picoseconds. These sensor characteristics help to measure the absorption and scattering coefficients of the biological tissues as well as highly time-resolved images.View full abstractDownload PDF (601K) -
Sumeet Shrestha, Hiroki Kamehama, Keita Yasutomi, Keiichiro Kagawa ...Session ID: IST2016-54
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSHigh energy particle imaging requires a detector with wide bandpass spectral response and high hit position pixel readout time. This paper presents the event driven wide dynamic range high energy particle detector for astronomical application. Silicon on insulator (SOI) based fully depleted pixel detector with high charge collection efficiency and high conversion gain has a pixel circuit with in-pixel event detection circuit and variable gain selection logic. Event detection circuit detects the incoming of the high energy particle in the detector. Strength of the detected signal is then compared within the circuit with minimum threshold energy for the amplification. In-pixel gain for an incoming energy is applied for low noise and wide dynamic range X-ray imaging.View full abstractDownload PDF (569K) -
Yuki Morikawa, Keita Yasutomi, Shoma Imanishi, Taishi Takasawa, Ke ...Session ID: IST2016-55
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSThis paper reports high time-resolved imaging technique using a lateral electric field charge modulator with bipolar-gates. The proposed pixel structure achieved high time-resolved signal detection by using negative bias effect by work function difference between the p-type gate and p-substrate. The test chip fabricated in 0.11 um CIS technology demonstrates the hole attraction effect, and the modulation contrast is measured to be 97%.View full abstractDownload PDF (564K) -
Yuya Shirakawa, Min Woong Seo, Keita Yasutomi, Keiichiro Kagawa, N ...Session ID: IST2016-56
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSIn this paper, we has proposed a new pixel design, which detects and transfers photo-induced charges to eight storage diodes (SD), and its effectiveness is demonstrated by a device simulation. The proposed pixel makes possible to measure the highly time-resolved imaging with a high signal to noise ratio and to observe various imaging of cells having different fluorescence lifetime in real time.View full abstractDownload PDF (654K) -
Atsutaka Miyamichi, Atsushi Ono, Hiroki Kamehama, Keiichiro Kagawa ...Session ID: IST2016-57
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSThe purpose of our study is the development of optical color filter having high color selectivity for image sensor. In order to achieve our purpose, we propose a new optical color filter of periodic corrugated metallic nano-structures based on surface plasmon resonance. By patterning the metal surface with a concentric periodic corrugation, light of the wavelength coupled with surface plasmons is transmitted as a beaming light through the sub-wavelength aperture. The beaming light transmission has an advantage to reduce the spatial color cross-talk in the conventional image sensor. We demonstrated the proposed corrugated metallic thin film filter had transmission color selectivity.View full abstractDownload PDF (391K) -
Unghyun Kim, Makoto IkedaSession ID: IST2016-58
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESS3D range finding is a very challenging topic in strong ambient light like sunlight. There are various methods using the amplitude of the reflected light to overcome the strong ambient light in 3D range finding. In this paper, we propose a 3-D range finding system based on triangulation with the structured light encoded in the frequency and the image sensor that can detect the specific frequency information of light while suppressing the background light. The simulated signal to background ratio (SBR) is 40.2dB.View full abstractDownload PDF (1142K) -
Yoko Shida, Mototaka Ochi, Hiroshi Goto, Hiroyuki Okuno, Moriyoshi ...Session ID: IST2016-59
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSWe have developed new aluminum alloy films for a light-shielding metal layer in image sensors. Unlike conventional tungsten films, which are widely used for light shielding in image sensor but easily peel off due to their high membrane stress of the film, the proposed aluminum alloy films have lesser membrane stress and show good adhesion properties as well as good thermal resistance.View full abstractDownload PDF (322K) -
Synchronization-free single-shot detection of imperceptible AR markers in a high-speed video displayTsutomu Kusanagi, Shingo Kagami, Koichi HashimotoSession ID: IST2016-60
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSIn this paper, we propose a method of embedding augmented reality (AR) markers in a displayed video so that they are imperceptible to human eyes. Using a high-speed projector, we display a set of markers that change their positions rapidly so that human eyes cannot perceive them, while a camera with a sufficiently short exposure time is able to detect at least one marker in the image even if there is no means of synchronization between the projector and the camera. Details of the marker design are presented.View full abstractDownload PDF (287K) -
Takuro Kosaka, Takayuki HamamotoSession ID: IST2016-61
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSIn this paper, we propose a new method for obtaining high dynamic range images with low motion blur and noise called “multiple temporal resolution imaging and processing” by controlling the exposure pattern of a 4×4 pixel block unit in a single image sensor. We demonstrate the effectiveness of our method through a simulation.View full abstractDownload PDF (1162K) -
Kosuke Wakita, Masayuki Ikebe, Yuma Takida, Hiroaki Minamide, Eiic ...Session ID: IST2016-62
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSA low power terahertz imaging using CMOS detector and analog-to-digital conversion (ADC) is proposed. For terahertz detection, a CMOS cascade amplifier, biased near the threshold voltage of a MOSFET, is utilized. A 16 x 16 pixel imaging array with the 256 column ADCs is designed using 180 nm CMOS process technology. Measured result for the pixel circuit is presented. The imaging pixel consists of a microstrip patch antenna, an impedance-matching circuit, and a direct detector. It achieves a responsivity of 51.9 kV/W at 0.915 THz and noise equivalent power (NEP) of 358 pW/Hz1/2 at modulation frequency of 31 Hz. NEP is estimated to be reduced to 42 pW/Hz1/2 at 100 kHz. The detector only draws about 3 µA from a power supply (Vdd) of 1.5 V.View full abstractDownload PDF (1966K) -
Myunghan Bae, Byoung-Soo Choi, Sang-Hwan Kim, Jimin Lee, Chang-Woo ...Session ID: IST2016-63
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSWe propose a linear-logarithmic CMOS image sensor with a modifiable dynamic range by adjusting the reference voltages. To implement these characteristics, a photogate and a MOS cascode are integrated with the pixel structure in conjunction with the photodiode. The new linear-logarithmic pixel is based on a conventional 3-transistor active pixel sensor structure. In addition, we propose the optimized pixel with reduced knee point variation in the logarithmic response. The proposed pixel has been designed and fabricated using a 0.35-μm 2-poly 4-metal standard CMOS process.View full abstractDownload PDF (540K) -
Sang-Hwan Kim, Byoung-Soo Choi, Myunghan Bae, Jimin Lee, Chang-Woo ...Session ID: IST2016-64
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSIn this paper, an averaging circuits using dual exposure technique for extending dynamic range of CMOS image sensor is proposed. The proposed CMOS image sensor has been implemented by a chip which is consisted of a pixel array, scanners, and proposed averaging circuits. Despite the equal number of transistors in pixels, it is possible to extend dynamic range of CMOS image sensor by using averaging circuit. In addition, comparing with conventional 3-transistor CMOS image sensor, it was demonstrated that dynamic range is improved from 70dB to 90dB after using average circuit by experimentally. The designed circuit has been fabricated by using 0.18μm 1-poly 6-metal standard CMOS process, and its characteristics are simulated and measured.View full abstractDownload PDF (499K) -
Byoung-Soo Choi, Myunghan Bae, Sang-Hwan Kim, Seunghyuk Chang, Jon ...Session ID: IST2016-65
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSComplementary metal-oxide-semiconductor (CMOS) pixel aperture structure for extracting depth information is presented. The proposed structure uses RGBW pixel patterns and the aperture is located in the white pixel. The focused image is obtained by white pixels and the defocused image by RGB pixels. Both the focused image and the defocused image can be used to obtain depth information of the object.View full abstractDownload PDF (552K) -
Yasuyuki Fujihara, Satoshi Nasuno, Shunichi Wakashima, Yusuke Aoya ...Session ID: IST2016-66
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSA 190-1100nm waveband multispectral imaging system is developed utilizing a highly UV-light sensitive and robust, wide dynamic range CMOS image sensor. A time-sharing LED illumination optical system with small chromatic aberration using achromatic lens is introduced to the multispectral imaging system. With the developed system, a 60fps real-time multispectral imaging using LEDs with eight different wavelengths from UV-Visible-Near IR was successfully conducted.View full abstractDownload PDF (1360K) -
Hyeon-June Kim, Sun-Il Hwang, Seung-Tak RyuSession ID: IST2016-67
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSThis paper presents a high-speed low-power readout scheme for CMOS image sensors (CISs) that utilizes the image properties. The proposed delta and interpolation readout (DI-readout) scheme reads the signal difference between two adjacent pixels (Δpixel) by utilizing MSBs information of the previous pixel, using large Δpixel for interpolation and small Δpixel for delta readout. By effectively reducing the dynamic range of the signal, the proposed readout scheme can reduce the number of decision cycles and the power consumption of SAR ADC. A prototype QQVGA CIS with ten 10-bit SAR ADCs was fabricated in a 0.18 μm 1P4M CIS process with a 4.4 μm pixel pitch. The measurement results of the implemented prototype CIS showed a figure-of-merit (FoM) for imager of 0.35 e-nJ.View full abstractDownload PDF (502K) -
Pages 41-
Published: 2016
Released on J-STAGE: November 07, 2019
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (131K)
- |<
- <
- 1
- >
- >|