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Hiromitsu Shiraki, Takayuki Kimura
Article type: Article
Session ID: 24-5
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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A low dark-current CCD register driven through the barrier has been proposed for use in FT CCD image sensor. This paper describes the simulated results concerning with the connection of the buried photo-diodes and the CCD register. Charge transfer from photo-diode to CCD register and that in the CCD register were analyzed taking care of the dark-current. The results indicate that the combination is useful for reduction of dark-current in the IL CCD image sensor.
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Toshihisa Watabe, Hiroshi Ohtake, Masahide Goto, Hideki Kokubun, Toshi ...
Article type: Article
Session ID: 24-6
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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We developed a CMOS readout circuit with large S/N for a solid-state HARP imaging devices. A CMOS readout circuit is composed of a charge transfer type voltage multiplier and CDS circuit. We designed the charge transfer circuit to achieve a voltage gain of about 4 and realize large S/N. A prototype chip was fabricated with 1.5μm, 2metal, 2poly CMOS technology and the characteristics of the circuit were evaluated.
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S. Miyatake, M. Miyamoto, K. Ishida, T. Morimoto, Y. Masaki, H. Tanabe
Article type: Article
Session ID: 24-7
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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This paper presents a 320 x 240 pixel CMOS active pixel image sensor (APS) with a transversal readout architecture that eliminates the vertically striped fixed pattern noise (FPN). There are two kinds of FPNs for CMOS APSs. One originates from the pixel-to-pixel variation in dark current and source-follower threshold voltage, and the other is from the column-to-column variation in column readout structures. The former may become invisible in the future due to process improvements. However, the latter, which results in a vertically striped FPN, is and will be conspicuous without some subtraction because of the correlation in the vertical direction. The pixel consists of a photodiode, a row- and a column-reset transistor, a source follower input transistor, and a column-selected transistor instead of the row-select transistor in conventional CMOS APSs. The column-select transistor is connected to a signal line, which runs horizontally instead of vertically. Every horizontal signal line is merged into a single vertical signal line via a row-select transistor. The imager exhibits neither a vertical nor horizontal stripe FPN.
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Hiroshi Wakasa, Jun Ohta, Mikio Suga, Motonori Doi, Osamu Oshiro, Kota ...
Article type: Article
Session ID: 24-8
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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We propose and fabricate a CMOS image sensor for HYPER OMNI VISION. By making proper configuration of pixels according to the transformation relation HYPER OMNI VISION, we can get projected perspective view without computing of post image processing. In addition, we design a motion detection function for this chip. A test chip is fabricated 32×32 pixels using 0.6CMOS process.
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M. Nanba, K. Osada, K. Miyakawa, Y. Takiguchi, S. Okazaki, T. Yamagish ...
Article type: Article
Session ID: 24-9
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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In preparation for increasing the number of pixels in field emitter image sensors with a HARP target, we designed a new field emitter array with the same number of elements as a conventional one but with higher emission. Experimental results showed an improved image quality and an enlarged dynamic range
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Norikatsu Yoshida, Jun Ohta, Masahiro Nunoshita
Article type: Article
Session ID: 25-1
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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We propose a pulse frequency modulation (PFM) vision chip employed an external control. So far PFM has not been externally controlled. We design an adjustable circuits that control the supply of current to the photodiode for PFM. This stabilizes the operation of PFM and is expected to improve the device performance.
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Takao Hirai, Jun Ohta, Masahiro Nunoshita, Shouzou Sugishita, Kunihiro ...
Article type: Article
Session ID: 25-2
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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We propose and demonstrate a vision chip with the function for detecting modulated light. The pixel circuit consists of 9 MOS transistors and have 2 floating diffusions(FD) which make it possible to detect modulated light. It is useful for application to high SNR imaging without depending background light.
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Nobuhiro Kawai, Shoji Kawahito, Yoshiaki Tadokoro
Article type: Article
Session ID: 25-3
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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CMOS image sensors are expected not only for the low-power smart imaging devices but also for the high-sensitivity imaging devices. In this paper, we propose a method of the noise reduction using frame oversampling and a CMOS image sensor with non-destructive high-speed readout mode. The technique enables the integration of signals without noise accumulation. Simulation results show that the frame oversampling is very effective to reduce output amplifer noise and quantization noise of ADC.
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T. Yasuda, T. Hamamoto, K. Aizawa
Article type: Article
Session ID: 25-4
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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In this paper, we propose the method to expand the dynamic range by performing saturation detection and optimizing integration time of every pixels. We design the adaptive-integration time image sensor in which circuits of controlling integration time and the real time reconstruction are integrated.
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Masaaki Sasaki, Shoji Kawahito, Yoshiaki Tadokoro
Article type: Article
Session ID: 25-5
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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A CMOS image sensor with wide dynamic range and improved contrast is presented. The proposed sensor uses logarithmic response CMOS active pixels and read-out circuits which partially responses to the exponential of the input. A linear range can be easily set by a reference voltage. The operation is simulated using 0.6/mum CMOS parameters. The linear range is increased by 20dB as the reference voltage is increased by 60mV.
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R. Oi, T. Hamamoto, T. Naemura, K. Aizawa
Article type: Article
Session ID: 25-6
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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With Image-Based Rendering method, the virtual viewpoint images are obtained by the multiple-camera images. However, most of the conventional systems sacrifice spatial or temporal resolution because of the heavy amount of input images. If the image sensor outputs externally-selected pixels only, the amount of input can be effectively reduced. In this paper we describe the design of selective pixel output image sensor. We observed this function under 540 frames/second.
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Akira Kubota, Kiyoharu Aizawa
Article type: Article
Session ID: 25-7
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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This paper presents a new depth from defocus method using two differently focused images, one of which is focused on near object, and the other on far object. By producing additional blurring effect on each object using linear filters and then by comparing the difference of their frequency components, we can determine depth layers. Experimental results for the scene with two depth are shown.
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Hiroshi Sasaki, Tatsuya Eki, Taichiro Kato, Shoji Kawahito, Koji Kobay ...
Article type: Article
Session ID: 25-8
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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We propose a new range-image sensor. It features 4 points. They are (1) using Phase-only correlation (POC) for parallax calculation, (2) integration of two image sensor into 1 chip, (3) using CMOS image sensor and (4) quick range-image generation as fast as 300fps. POC is suitable for parallax calculation because its correlation image peak is very sharp. This sensor has an ability to integrate range-calculation logic with image sensors because it is made with CMOS process.
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Taichiro Kato, Shoji Kawahito, Tetuo Hisanaga, Koji Kobayashi, Hiroshi ...
Article type: Article
Session ID: 25-9
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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In this paper, A CMOS image sensor with two sensing planes for three dimensional measurement is presented. Two imager array has respectively 16-channel parallel readout scheme and the 16-channel outputs of image sensor are converted bit serial digital signals for suitable data format to prosessor of dimentional measurement using 16-channel A/D converter on a chip. This image sensor implemented based on triple-metal double-polysilicon 0.6-um CMOS technology.
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Ikuko Ota, Yasuhiro Ohtsuka, Kiyoharu Aizawa
Article type: Article
Session ID: 25-10
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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This paper describes a method of the center detection of a moving object. We propose median as the center coordinates. We also discuss an architecture of the image sensor to compute median.
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D. Handoko, S. Kawahito, Y. Tadokoro, A. Matsuzawa
Article type: Article
Session ID: 25-11
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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This paper describes an on-sensor motion vector estimation with an adaptive iterative search. This technique uses high-speed pictures obtain from a non-destructive CMOS sensor. The algorithm and the performance of this technique will be shown.
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S. Nagao, C. Kita, T. Hamamoto, K. Aizawa
Article type: Article
Session ID: 25-12
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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We have been investigating a real time processing system by using binocular image compression sensors and FPGA. We use 1bit flag signals which have the address information of moving area. The system can track the moving object and estimate the depth of the object using right and left flag signals.
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T. Wakamatsu, N. Inokihara, T. Hamamoto, K. Aizawa
Article type: Article
Session ID: 25-13
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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In this paper, we propose a new method of 8bit Analog to Digital Converter (ADC) on an image sensor using integration time information. We have fabricated a second prototype using CMOS 0.8 μm process. We describe the circuit and layout design of the prototype.
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Hiroki Ui, [in Japanese], Kenichi Shimomura, Kazunori Okui, Yoji Nagaf ...
Article type: Article
Session ID: 25-14
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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A 1/4 inch image-sensor with 160×144×3(RGB) pixels for mobile applications has been developed, using a 0.6mm CMOS technology. The sensor realized specifications needed in mobile applications, such as low power dissipation and on-chip image processing functions which reduces load of ASICs or processors outside of the sensor, and which leads to a simple camera system.
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M. Edamoto, M. Sakakibara, S. Kawahito
Article type: Article
Session ID: 25-15
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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In this paper we propose image compression circuits for high-speed imaging system using a CMOS sensor. The proposed compression system consists of 4×4 2-D DCT processors and variable length coders with parallel output. DC, AC, and Zero Run Length (ZRL) components of the 2-D DCT coefficients are optimally assigned to the parallel output lines, depending on the nature of images. This method greatly simplifies the Huffman table. The compression ratio and the PSNR is comparable to JPEG.
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Myeongsoo Oh, Kiyoharu Aizawa
Article type: Article
Session ID: 25-16
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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A large-scale image sensing extended over very wide area can be realized by numerous image sensors, however, tremendous volume of data can cause adverse effects to the system such as network congestion. As a result, the system performance will be greatly deteriorated. One of the feasible ways to cope with such problem is to use smart image sensors as image acquisition devices because they can reduce the data volume on sensor level. In this paper, as a practical solution, we propose dynamic data rate control by adjusting spatial or temporal resolution with sampling-variant smart image sensors. Simulation results show that this scheme can provide an efficient use of network resources while preserving main objects in the scenes.
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Tadashi Okajima, Hideaki Yano, Koichi Kawakami, Masao Takuma, Koji Fuj ...
Article type: Article
Session ID: S1-1
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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We successfully developed the brand new digital camera <IDC-1000Z>using the iD PHOTO disk (capacity: 730MB, diameter: 50mm) as a recording medium. This camera can hold as many as 1200 still pictures (1360×1024) and about 8minutes moving pictures (Motion-JPEG, 640×480, 30fps). The camera can also be used as an external disk drive for a computer so that users will not need to get any special softwares installed on it. In this paper, we will present some of our remarkable techniques which enable to record large photo data on a super high density disk(4.6GB/inch・) at very high data transfer rate(20Mbps).
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Toshihiro Sugaya, Eizo Shibui, Satoshi Kusano
Article type: Article
Session ID: S1-2
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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HDTV signal recording and playback system using current DVD-ROM format has been developed. Navigation system is realized using time stamp added on transport stream. Playback system consists of a controller box including 10× DVD-ROM drive and a control board, STB for BS digital broadcast, and personal compute. Play back time is about 24 min./single sided DVD-ROM or DVD-R disc at data rate of 26Mbps.
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Article type: Appendix
Pages
403-
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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Hiroshi YASUDA
Article type: Article
Session ID: S2-1
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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Hideki Sakamoto
Article type: Article
Session ID: S2-2
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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Hideki Nogata
Article type: Article
Session ID: S2-3
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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In a digital and networked environment such as the Internet, we tend to think that technology will make everything possible. Then let us consider, just how much "copyright administration" technology has enabled us. We will return to the basics, to contemplate what "copyright management technology" truly means in the field of music where copyright, neighboring right and moral right issues intertwine in a complex puzzle.
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Akihiko Chigono
Article type: Article
Session ID: S2-4
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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NHK has been constructing our new archives with the aim of opening on February 1, 2003. It has 8 stories with storage space for 1.8 million videotapes. The Archives system consists of "Comprehensive database", "Large Scale Video Server", "Video Storage System", "Transmission System" and "Open Library".
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Tatsuo Matsuoka
Article type: Article
Session ID: S2-5
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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Tetsuro KUGE
Article type: Article
Session ID: S3-1
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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The new still-image coding technology JPEG2000 offers many advantages over existing standards, with additional features and functionalities as well as high compression performance. This paper introduces and discusses a number of issues in the application of JPEG2000 to high-resolution image media such as HDTV and ultra-high-definition images.
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Masahiro Yamaguchi
Article type: Article
Session ID: S3-2
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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This paper introduces natural vision technology for high-fidelity color image reproduction. The natural vision system utilizes the multispectral image capture and the multiprimary display, and realizes the enhanced visual telecommunication with natural color beyond conventional RGB imaging systems.
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Kenji Nakazawa
Article type: Article
Session ID: S3-3
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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Recent display progress of super-high-resolution images and 3D images are viewed in the terms of man-machine interface in the 21^<st> image information communication era. The related state of the art technologies are discussed in the terms of human-eye function and high presence.
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Koki SATO
Article type: Article
Session ID: S3-4
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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Highly realistic displays are very important for the artistic Image presentation. They are wide screen, HDTV, head mount display(HMD) and 3D display such as stereoscopic display with glasses like CAVE and holography. Also now the computer system becomes high speed and CG technics can be easily used for image creation. So in this paper I will speak about the matter of holography display and image creation expecting for holography.
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Fumio Kishino
Article type: Article
Session ID: S3-5
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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This paper describes state of the art of virtual reality technologies in a cyber space which plays an important part in recent information-oriented society, especially, an importance of a mixed reality type has been increasing. As examples, I will introduce human interface technologies in the co-operative virtual communication environment, the interactive digital fishtank and ActiveCube.
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Hiromitsu Miyazaki
Article type: Article
Session ID: S4-1
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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Recently, it is a nationwide trend that a local government build a high-speed network. Okayama Prefecture started building the information-superhighway in 1996, and it has been opened since April, 1998. This is reported of experiments using the "Okayama information highway" for broadcasts at the local TV station.
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Kazuhiro NAKATA, Toyomitsu OKUMURA, Katsushi NISHIO, Seiji YAMASHITA, ...
Article type: Article
Session ID: S4-2
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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In this paper, we describe the result of the experiments to make clear that the future of the Interactive Broadcast services. For this experiments, the NTT west, which is a communication company, cooperated with the RCC, which is a broadcast company. By using both the community and the broadcast, the Interactive Broadcast services are realized. Then, we can provide the new services for the TV viewers, and this is the key that leads to success for the digital broadcast.
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Yasushi Matsubara
Article type: Article
Session ID: S4-3
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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Article type: Appendix
Pages
App1-
Published: August 27, 2001
Released on J-STAGE: May 24, 2017
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