ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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40.15 Information Sensing Technologies(IST)
Displaying 1-11 of 11 articles from this issue
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  • Information Sensing Technologies (IST)
    Pages Cover1-
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Contents
    Pages cover2-
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_cover2
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • A study on auto focus for 8K camera using on sensor phase-difference detection
    Takahiro Yamasaki, Ryohei Funatsu, Tomohiro Nakamura, Tetsuya Hayashid ...
    Session ID: IST2016-21
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    It is not easy to adjust 8K camera's focus precisely. To resolve this problem, we are researching for on sensor phase-difference detection system that is a fast auto focus system. In this report, we describe the new signal processing to suppress crosstalks between phase-difference detection sensor pixels. This can improve error-rates of phase-difference detection. Actually, we had done experiments about auto focus using 8K sensor with on sensor phase-difference detection, and verified that our new signal processing is effective for improvement of its accuracy.
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  • Differential Spectral Response Based Ultraviolet Radiation Sensor Using Silicon Photodiodes
    Yhang Ricardo Sipauba Carvalho da Silva, Yasumasa Koda, Satoshi Nasu ...
    Session ID: IST2016-22
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_5
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A bulk-Si ultraviolet radiation sensor was developed by extracting the differential spectral response of a high UV sensitivity and a low UV sensitivity photodiodes. Both types of photodiodes were fabricated together in the same chip, by adjusting the dopant concentration profiles. The developed sensor showed a sensitivity of 0.132 A/W at 310 nm and a residual sensitivity lower than 0.014 A/W for wavelengths longer than 500 nm. In this paper, the operating principle of this sensor, its fabrication method and the measurement results are discussed.
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  • [Poster Session]A Lateral Electric Field Charge Modulator without Negative Gate Bias
    Yuki Morikawa, Keita Yasutomi, Shoma Imanishi, Taishi Takasawa, Ke ...
    Session ID: IST2016-23
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_9
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This paper presents a new pixel structure for a lateral electric field charge modulator without negative gate bias. The proposed pixel structure employs p-type gates as well as n-type gates unlike the conventional structure in which the only n-type gates is used. Since the bipolar-gates structure helps to attract holes at zero bias by work function difference between the p-type gate and p-substrate. The negative gate bias is not required in the modulation pulses. It makes easy to introduce an in-pixel buffer, which plays an important role for high-speed charge modulation. The test chip fabricated in 0.11 um CIS technology demonstrates the hole attraction effect, and the modulation contrast is measured to be 97%.
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  • Ultraviolet Spectral Imaging using High Light Resistance Wide Dynamic Range CMOS Image Sensor
    Yasuyuki Fujihara, Satoshi Nasuno, Shunichi Wakashima, Fumiaki Kus ...
    Session ID: IST2016-24
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This paper reports ultraviolet spectral imaging technology using a high light resistance wide dynamic range CMOS image sensor. The CMOS image sensor has been designed, fabricated and evaluated. It achieved a wide spectral response for 190-1000nm, a 94dB dynamic range, a full well capacity of 87ke-, a maximum frame rate of 1.2kfps and a high light resistance to UV light exposure. An ultraviolet spectral imaging system was developed by using the CMOS image sensor and captured real-time images of the chemical substances’ diffusion in a liquid which cannot be observed under visible light.
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  • [Poster Session] Ultra-high sensitivity multi-aperture camera using a photon counting image sensor
    Haruki Ishida, Bo Zhang , Keiichiro Kagawa, Min-Woong Seo , Taishi ...
    Session ID: IST2016-25
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_17
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We are aiming at realizing the ultra-high sensitivity camera with an F-number less than 1, which is hard to implement in a single-aperture optical system. In this study, we study applicability of a photon-counting-level ultra-low-noise CMOS image sensor. CMOS image sensors have an in-pixel amplifier for each pixel. Therefore, the noise level differs pixel by pixel. Moreover, extremely large noise called random telegraph signal (RTS) noise appear at not a few pixels. In the simulation, the noise performance in 3 × 3 aperture system using real read noise data is investigated with the read noise data measured by a prototype ultra-low-noise CMOS image sensor. In the raw image, the effective noise of the pixel which has RTS noise is 6.47 e-RMS. After simple averaging, effective noise becomes 0.80 e-RMS. With the proposed selective averaging method which minimizes synthetic sensor noise, the effective noise becomes 0.18 e-RMS and RTS noise is removed.
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  • Light-adaptive imaging method using interleave-exposure-control image sensor
    Takuro KOSAKA, Takashi KOBAYASHI , Takayuki HAMAMOTO
    Session ID: IST2016-26
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_21
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We propose the method of light-adaptive imaging. Using interleave-integration-control image sensor, we resolve the problem that ratio of the sensitivity is invariable in conventional SVE systems. The ratio of sensitivity is variable by controlling the exposure time pattern in a 2×2 pixel block unit. In this paper, we explain how to adjust the brightness range for the contrast of the object. Furthermore, we show the effectiveness by a simulation and the proposed system constructed using the image sensor and FPGA.
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  • Image Sensor with the Selectable Gain Amplifier for Signal Readout
    Shintaro MAEKAWA , Toshinori OOTAKA, Takayuki HAMAMOTO
    Session ID: IST2016-27
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_25
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The brightness range that a CMOS image sensor can capture is limited. This range is commonly referred to as a dynamic range and generally 60~70dB. If the contrast of subject is beyond the dynamic range, there is a problem that either whiteout or blackout occurs. Changing the sensitivity for each pixel is one of the ways to expand the dynamic range on the assumption that we execute image reconstruction. However, the conventional techniques of changing the sensitivity for each pixel have some problems. Therefore, we consider switching the read-out gain from pixel circuit to improve the problems of the conventional techniques. This paper proposes a pixel circuit for realizing that and shows the simulation results.
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  • A television camera to capture HDR and SDR images simultaneously
    Yoshitaka IKEDA, Kenichiro MASAOKA, Yukihiro NISHIDA
    Session ID: IST2016-28
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_29
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Ultra High Definition Television (UHDTV) test broadcasting is planned to start in 2016 in Japan. This will include High Dynamic Range (HDR) television. On the other hand, HDTV with Standard Dynamic Range (SDR) is continued in the existing terrestrial and satellite broadcasting. It would be necessary to produce both HDR and SDR programs simultaneously. In an outdoor shooting environment where the luminance of objects cannot be controlled by producers, HDR and SDR require different iris control. We have devised a television camera that can capture both HDR and SDR images simultaneously. This camera is equipped with “an electronic iris” in addition to a conventional optical iris so that HDR and SDR images can be produced with different aperture adjustments. We have developed a prototype of a camera and confirmed the effectiveness by an experimental shooting.
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  • Information Sensing Technologies (IST)
    Pages 33-
    Published: 2016
    Released on J-STAGE: May 16, 2019
    DOIhttps://doi.org/10.11485/itetr.40.15.0_33
    CONFERENCE PROCEEDINGS FREE ACCESS
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