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Tetsuo FUKAMI, Ryoichi HIGASHI
Article type: Article
Session ID: 20-5
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We have observed the UHF TV intensities received from the Japan Sea side at Tsubata since May 2005. TV waves of Matsue and Korea have been received irregularly. From the good correlation with the weather, these receiving are probably caused by the UHF duct propagation on the Japan Sea.
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Shingo ASAKURA, Kenichi MURAYAMA, Makoto TAGUCHI, Takuya SHITOMI, Kazu ...
Article type: Article
Session ID: 20-6
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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NHK is conducting research on next generation of digital terrestrial broadcasting to enable large volume content services such as Super Hi-vision. We previously reported the field experiment of SHV signal transmission using two channels in the UHF band. In addition, we also have conducted an experiment in radio over fiber transmission of dual polarized MIMO-ultra multilevel OFDM signal, and this paper reports the results.
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Hikaru FUJIMOTO, Kazuhisa HAEIWA, Takeshi KAMIO, Hisato FUJISAKA
Article type: Article
Session ID: 20-7
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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Though we have been developing micro-band LN optical modulators, degradation of sensitivity produced at 7GHz greatly. Since this phenomenon is caused by resonance of LN crystal substrate, we discussed how to enhance sensitivity, and showed smaller size of LN crystal substrate is very effective.
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Keisuke NAGATA, Hisato FUJISAKA, Takeshi KAMIO, Kazuhisa HAEIWA
Article type: Article
Session ID: 20-8
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper reports a procedure and a result of probabilistic analysis of non-coherent delay-locked loop used in asynchronous code division multiple access communications with Markovian sequences under multipath fading channels. As a result, we found that the estimations are close with the results obtained by numerical simulation.
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Yoshitaka HAKAMADA, Naoyoshi NAKAMURA, Kimiyuki OYAMADA
Article type: Article
Session ID: 20-9
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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For transmission of a high speed transport stream greater than the transmission capacity of a channel on cable TV networks, we propose a multiplexing method with expanded JTSMF frame, which can achieve highly efficient transmission. We also evaluated an experimental system with a prototype.
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Tsutomu NODA, Masayuki TOKUTAKE, Shuichi MATSUMOTO
Article type: Article
Session ID: 20-10
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper describes an enhancement scheme for digital cable TV transmission focusing on coding, error correction and modulation.
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Hitoshi AKIYAMA, Takanori YUKIMATSU, Masaki NODA, Syunzo KINOSHITA, Ta ...
Article type: Article
Session ID: 20-11
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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Data communication system using TV white space for rescue robots, the use scene and necessary technical requirements were studied. The wireless propagation was inspected by actual surveys and simulation. Proto type system which meets to the technical requirements was implemented to investigate its performance and interferences.
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Kensuke IKEYA, Kensuke HISATOMI, Miwa KATAYAMA, Yuichi IWADATE
Article type: Article
Session ID: 21-1
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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In this paper, we propose a multi-view image expression method using a multiple robot camera system. The proposed method enables us to do multi-view image expression of the moving subject in the large space. In experiments, we applied our method to a scene of horizontal-bar in gymnastics and confirmed effectiveness of the proposed method.
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Michihiro MIKAMO, Marcos SLOMP, Bisser RAYTCHEV, Toru TAMAKI, Kazufumi ...
Article type: Article
Session ID: 21-2
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We propose a method for rendering positive afterimages considering human visual perception. Positive afterimages can be seen after glancing at bright objects. The afterimage simulation is useful for driving simulations in night scenes.
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Yuki NAGAI, Yusuke UCHIDA, Emi MYODO, Shigeyuki SAKAZAWA
Article type: Article
Session ID: 21-3
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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In this paper, we propose a new method for generating watercolor-like images in which highly salient regions are accentuated. The method abstracts and simplifies images using mathematical morphology. A scale of a structuring element is defined according to the corresponding value of the saliency map. From the results of a user study, we confirmed that importance of reflecting the saliency to the morphological transformation.
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Aun CHO, Yshiko AKIYAMA
Article type: Article
Session ID: 21-4
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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Proposition of a new method for photorealistic representations
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Shinntou SHINN, Aun CHO
Article type: Article
Session ID: 21-5
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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Another set of images with minimized number of materials are created then shown to individuals as before/after, to distinguish which of the materials are necessary and which are not.
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Hidenori SAKANIWA, Nobuhiro FUKUDA, Mitsuo NAKAJIMA, Kaoru HIROTA
Article type: Article
Session ID: 21-6
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We have developed new visual perceptual extraction of gloss parts from an image by Multiscale Retinex applied technology. We confirmed that our technique could properly extract the parts which a human subjectively feels as gloss. Our technique achieved better results than a gloss part extraction method based on dichromatic reflection model.
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Hitokimi Ryu, Tokiichiro Takahashi, Tomoaki Moriya
Article type: Article
Session ID: 21-7
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We have developed a physically-based simulation system for Judo beginners considering kuzushi (unbalancing opponents). In order to conduct practice of Judo safely at Japanese Junior High School classes, visual guidance function is attached.
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Shoichiro MIHARA, Daisuke IWAI, Kosuke SATO
Article type: Article
Session ID: 21-8
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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Although radiometric compensation realizes displaying a desired color on a surface inadequate for projection, bright artifacts occur in a projected pixel where the reflectance property is precipitously changed. We propose a solution to minimize the artifacts by using the dense reflectance properties measured by a high-resolution camera.
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Masaki HAYASHI, Akihiko IGUCHI, Satoshi MACHIDA
Article type: Article
Session ID: 21-9
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We introduce an 'Ultra-CG Project' which promotes extreme high-definition real-time computer graphics system whose resolution is 4K and 8K (Super Hi-Vision). It is important for the project to study not only hardware and software but also content creation methodology suitable for extreme high-resolution. This paper shows a functioning test system which exhibits 'Virtual Museum' in 4K resolution and discusses our future plan.
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Kenji KIKUCHI, Shigeyuki IMURA, Kazunori MIYAKAWA, Misao KUBOTA
Article type: Article
Session ID: 22-1
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We investigated the possibility of a photoconductor using CIGS chalcopyrite semiconductors for solid-state image sensors. CIGS chalcopyrite semiconductors have both a high absorption coefficient and a high quantum efficiency. However, the dark current of them is too high for image sensors. In this study, we proposed a hole-blocking structure using gallium oxide for the CIGS photoconductor. As a result, we could drastically reduced the dark current. Then, the avalanche multiplication phenomenon was observed at an applied voltage of over 6 V.
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Keiji UMETANI, James T. PEARSON, Daryl O. SCHWENKE, Mikiyasu SHIRAI
Article type: Article
Session ID: 22-2
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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X-ray intravital microscopy using a microangiography technique at SPring-8 can visualize the small coronary arteries in rats. Vascular dysfunctions in the small coronary arteries were visualized in in vivo experiments using disease model rats. The system has the ability to provide detailed anatomical information of the rat coronary arteries which is close to that of a human coronary angiogram.
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Song Song, Keita Yasutomi, Keiichiro Kagawa, Isamu Takai, Shoji Kawahi ...
Article type: Article
Session ID: 22-3
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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Recently, aiming to carry out the realization of advanced traffic systems, the optical communication system which is based on LED traffic lights is presently being studied. Devices used to find the area of signal light source and receive the optical signal are strongly required. This paper presents a high-speed light pulse receiver (LPR) cell using a pinned photodiode and lateral charge overflow drain. The geometry optimization in order to enhance the time response is also investigated.
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Kouu YOU, Tetsuya MATSUMOTO, Yoshinori TAKEUCHI, Hiroaki KUDO, Noboru ...
Article type: Article
Session ID: 22-4
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We propose an image restoration method for bended documents by using the cross-ratio. The proposed method estimates the orientation of a vertical line by using the cross-ratio. By using the orientation and extracted text lines, the image is segmented into several grids. Restoration is performed on every grid.
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Hiroki KAMEHAMA, Keita YASUTOMI, Keiichiro KAGAWA, Shoji KAWAHITO
Article type: Article
Session ID: 22-5
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper describes a new method of small-size and low-power consumption cooling for decreasing dark current of image sensors. The image sensor has a thermal separation structure between pixel area and readout circuits. A small-size and low-power consumption cooling module can be realized by this structure with a small current peltier module. The cooling effect by using this structure with a peltier module is investigated with thermal analysis simulation.
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T. Arai, J. Yonai, H. Ohtake, T. Hayashida, Harry van Kuijk, T. Goji E ...
Article type: Article
Session ID: 22-6
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We successfully developed a 310-kpixel backside-illuminated ultrahigh-speed charge-coupled device (CCD) with a dynamic range of 100% at 1 million frames per second (fps). Voltage at a quarter period dependent on frame rate was calculated and voltage at a quarter period was 12 V at 1 million fps. Consequently, the saturation signal level was estimated to be 100% at 1 million fps. Results of a driving experiment confirmed that the dynamic range was 100% at 1 million fps.
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T. Arai, J. Yonai, H. Ohtake, T. Hayashida, Harry van Kuijk, T. Goji E ...
Article type: Article
Session ID: 22-7
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We successfully developed a 310-kpixel backside-illuminated ultrahigh-speed charge-coupled device (CCD) with 13 times higher sensitivity than that of front-side-illuminated ultrahigh-speed CCDs. The increased sensitivity in the backside-illuminated structure was achieved with an optical aperture ratio of 100% and a time aperture ratio of 100%, and by increasing the optical utilization factor. Results of a driving experiment confirmed that the sensitivity of the backside-illuminated ultrahigh-speed CCD was 13 times higher than the aforementioned front-side-illuminated ultrahigh-speed CCD.
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Masato Tanaka, Tomio Goto, Satoshi Hirano, Masaru Sakurai
Article type: Article
Session ID: 23-1
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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MPEG-2 compression using HDTV terrestrial broadcasting degrades the picture quality because of mosquito noise and blocky noise. In this paper, we improve an effective image compression noise reduction system based on the total variation (TV) regularization method by using the Quantizer Scale Code in MPEG-2.
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Takashi KOMATSU, Takahiro SAITO
Article type: Article
Session ID: 23-2
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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In the case of denoising using redundant transform, independent shrinkage operation of its coefficients is not optimal. This paper derive new shrinkage method which considered the inter coefficients redundancy. We evaluate the denoising performance of our new shrinkage method using computer simulations.
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Seiichi GOHSHI
Article type: Article
Session ID: 23-3
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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Super Resolution (SR) has recently become a common phrase in Japan. Commercial products such as TV sets, BluRay players and digital cameras are equipped with SR function and are sold in the market. Although there are several types of SR technologies for commercial products and their details are not open, some of them are not new technologies and are just modified conventional ones. However, according to official web pages of certain manufacturers of them seem to be all new technologies. One of the new SR technologies for them is the super resolution image reconstruction (SRR). Most of SR technologies have complex algorithms such as iterations under constraint conditions and precise motion vector detections. Although SRR also has a complex algorithm, it is the only SR technology for real time equipment. However, in principle there is a limit of resolution improvement with SRR even if it works perfectly. In this paper the limit of SRR is discussed.
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Shunji Miura, Tomio Goto, Satoshi Hirano, Masaru Sakurai
Article type: Article
Session ID: 23-4
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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In this paper, we propose a new learning-based super-resolution method, which utilizes the Principal Components Analysis (PCA) to remove noise, which includes in the learning-based process when its database redundancy is removed. The proposed algorithm significantly reduces the complexity and maintain a comparable image quality.
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Yoshitomo SHIDA, Kenji SHOJI, Hiroshi MORI, Fubito TOYAMA, Juichi MIYA ...
Article type: Article
Session ID: 23-5
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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A method for automatic coloring of handwritten line drawings is proposed. When a line drawings is given with a reference color image, Delaunay triangulation is applied and the color of each triangle is determined referring the color image. And the color of each triangle is averaged among four adjacent ones.
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Takafumi SHIKANO, Kazuki WATANABE, Takashi KOMATSU, Takahiro SAITO
Article type: Article
Session ID: 23-6
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper addresses processing of laser range data. We are given a laser range scanner based on the time-of-flight method. This method cannot give us perfect range data. We develop a method for the repair of laser range data. We apply the repaired range data to the image processing for the post-production.
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Yoshihiko KAWAI, Mahito FUJII
Article type: Article
Session ID: 23-7
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper proposes a video retrieval system for TV programs. The proposed method uses an iterative learning considering closed caption and image feature to create a classifier of general object effectively. Experimental results showed the effectiveness of the proposed method.
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Naoki FUKUDA, Takahiro MOCHIZUKI, Masanori SANO, Mahito FUJII
Article type: Article
Session ID: 23-8
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper describes a method to generate scene sequences of program video by merging shots based on color lists derived from each shot-representative image. The most of conventional method detect "situation transitions" as a criterion for merging shots on the basis of change of color histogram between adjacent shot-representative images. However, there are some cases that situation transitions could be false-detected despite of not-changing situation. We propose an approach to detect situation transitions based on the inclusion relation between "color list" of current shot-representative image and "integrative color list" of some images before it.
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Sixu Li, Kohei Inoue, Kiichi Urahama
Article type: Article
Session ID: 23-9
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We present a simple technique for upscaling small-size pixel-arts. At first, an input image is upscaled on the basis of the saliency of each color, i.e. the global and local majority of colors. Next, noise on color boundaries is removed. Our method preserves every color in the original image, i.e. smoothes images only geometrically. The upscaling procedure is reversible, i.e. the original pixel-art is easily obtained from the upscaled output.
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Toshiharu HORIUCHI, Hiroshi SANKOH, Tsuneo KATO, Sei NAITO
Article type: Article
Session ID: 24-1
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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This paper presents a novel interactive music video application for smartphones based on free-viewpoint video technology in conjunction with three-dimensional positional audio technology. A user can watch an immersive music video from his/her own moving viewpoint which is controlled by the touch screen, along with the positional audio through the headphone.
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Jianfeng XU, Shigeyuki SAKAZAWA
Article type: Article
Session ID: 24-2
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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Interactive control is essential in mobile games, which is still a challenging issue in the field of dynamic animation generation on mobile devices. In this demo, we provide an Android Augmented Reality (AR) application on a smart phone, where user can interactively control the character's motion in the dance animation through the touch screen.
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Masami NAKAZAWA, Kazushi IKEDA, Gen HATTORI, Chihiro ONO
Article type: Article
Session ID: 24-3
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We propose a method for automatically annotating scenes of TV programs with keywords representing their content. We achieve this by collecting and analyzing tweets related to the TV program. The main feature of our method is the extraction of keywords based on person names. We conducted an experiment for comparative evaluation and confirmed the effectiveness of our method.
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Takahiro MOCHIZUKI, Hideki SUMIYOSHI, Masanori SANO, Mahito FUJII
Article type: Article
Session ID: 24-4
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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The layout-based image retrieval method generally uses grid-shaped division of an image into sub-blocks and similarity based on a comparison of image features between corresponding sub-block regions in two different images. However, there are some cases in which geometric differences of objects or the similarity of the background region have a negative effect. In this paper, we propose a method that uses the allocation of some sub-blocks in the object region and the similarity of highly weighted sub-blocks in the object region. We verified the effectiveness of this method through comparison experiments.
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Emi MYODO, Koichi TAKAGI, Shigeyuki SAKAZAWA
Article type: Article
Session ID: 24-5
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We have presented a photo layout system which preserves a photo order. In order to enhance the subjective quality, we present a photo slideshow system which applies transitions to some photos, render them on web browser by using CSS3 and layout structure is changed based on screen size and shape.
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Haruhisa Kato, Akio Yoneyama
Article type: Article
Session ID: 24-6
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We propose a marker-less augmented reality application based on a realtime hand posture estimation technique for smartphones. The proposed method realized rendering of virtual 3D models on a hand over 12 fps on a smartphone. Simulation results show that we can archive about 73% complexity reductions and be more accurate than the conventional method.
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Kohei Inoue, Kenji Hara, Kiichi Urahama
Article type: Article
Session ID: 25-1
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We propose a method for enhancing the contrast of grayscale images by equalizing their weighted histograms based on the gradient norm, and quantitatively evaluate the effectiveness of the proposed method.
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Tetsuya NOBUOKA, Koji ABE, Masahide MINAMI
Article type: Article
Session ID: 25-2
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper presents features for recognizing normal cases in double contrast X-ray images of stomach. The features are extracted by analyzing the fold pattern appeared on the stomach wall. Experimental results by discriminating normal cases using 105 images showed ratios of the discrimination by the features are more than 95%.
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Satoshi Shoji, Kenji Shoji, Hiroshi Mori, Fubito Toyama, Juichi Miyami ...
Article type: Article
Session ID: 25-3
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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The purpose of this study is to extract equi-width regions. To measure the width we use Delaunay triangulation. Width can be thought as the height of the triangle having a base side on an image edge. Equi-width regions are extracted by gathering connected triangles with same color and width.
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Xiangping Liu, Kenji Shoji, Hiroshi Mori, Fubito Toyama, Juichi Miyami ...
Article type: Article
Session ID: 25-4
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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A method for extracting handwritten onomatopoeia characters from comic images was developed based on the color feature and the width feature of characters. The segmentation using Delaunay triangulation and the color clustering with fuzzy c-means algorithm are applied. The effectiveness of the method was confirmed.
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Naoki TAKAMURA, Kazuhiro FUJITA, Shinya OKETANI, Nobuyuki NAKAMORI
Article type: Article
Session ID: 25-5
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We propose a method to transfer the color shade of a target image to one of a reference image by matching their RGB average vectors and auto-covariance matrces.
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Akira HINENO, Koji ABE, Masahide MINAMI
Article type: Article
Session ID: 25-6
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper presents a feature for measuring area of the projections in endoscopic images of internal hemorrhoids. The projections is a symptom in the hemorrhoids and the feature could be useful as variables in discrimination of the hemorrhoid cases. Experimental results using 90 cases showed ratios of the discrimination are more than 80%.
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Keisuke OHTA, Naoyuki AIKAWA, Shoichi KUMON, Ryuji TAMURA
Article type: Article
Session ID: 25-7
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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We propose clustering algorithm for SEM image composed of a mixture of Nd-H and Fe(B). The clustering algorithm consists of dividing process and merging process. Dividing process is based on watershed algorithm. Dividing region is classified into three categories by merging process.
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Kanichi TANIGUCHI, Shoko IMAIZUMI, Naokazu AOKI, Hiroyuki KOBAYASHI
Article type: Article
Session ID: 25-8
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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This paper proposes a hierarchical image authentication based on reversible data hiding. The proposed scheme decreases costs to detect and locate tampered area by using hierarchically multiplex layers. This scheme reduces both the length of embedded data and the amount of hash operations. We improve the structure of layers and the division of blocks in the conventional scheme. Our scheme is based on reversible watermarking. Evaluation of PSNR demonstrates the scheme we propose.
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Makiko NAGASAWA, Yoshinori HATORI, Mitsugu KAKUTA, Tadao HAYASHI, Yosh ...
Article type: Article
Session ID: 25-9
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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This paper proposes a smash motion analysis for badminton in a space that represents the position and the velocity which is obtained from a space that represents the position and the time after the KL transform. The proposed method by computer simulation is demonstrated and experimental results from the data of the video of Japanese elite players are also shown.
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Mito OHKURA, Shunichi SATO, Tadaaki HOSAKA, Takayuki HAMAMOTO
Article type: Article
Session ID: 25-10
Published: August 29, 2012
Released on J-STAGE: May 24, 2017
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The Wavefront Coding (WFC) is a technique of extending depth of field by restoring the image blurred through the phase mask in the lens. In this paper, we aim to improve the quality of the restoration by selecting appropriate deconvolution filters according to subject-distances estimated with the stereo matching.
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