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Evaluating 3D position and velocity of subject in parabolic flight experiment by use of the binocular stereo vision measurement

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Chinese Optics Letters 2010年第6期8卷 601-605页

作者：金涛贾宏志侯文玫 Ryo Yamamoto Norihiro Nagai Yusaku Fujii Koichi Maru Naoya Ohta kazuhito shimada Shanghai Key Laboratory of Modern Optical System School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and Technology Department of Electronic Engineering Faculty of EngineeringGunma University Department of Computer Science Faculty of EngineeringGunma University Medical Operations Japan Aerospace Exploration Agency(JAXA)JAXA Houston OfficeHouston 77058USA

A practical method for evaluating the three-dimensional（3D） position and velocity of a moving object used in the parabolic flight experiment is developed by using the binocular stereo vision measurement theory. The camera calibration mathematic model without considering the lens distortion is *** direct linear transformation（DLT） algorithm is improved to accomplish the camera *** camera calibration result and optimization algorithm are used to calculate the object＇s world coordinate from image *** 3D position and the velocity of the moving object are *** standard uncertainty in estimating the velocity is 0.0024 m/s,which corresponds to 1%level of the velocity of the object in the *** results show that this method is very useful for the parabolic flight experiments.

关键词： Binoculars Calibration Cameras Experiments Linear transformations Measurement theory Three dimensional Uncertainty analysis Velocity

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运动的目标圆盘的轮廓和圆心提取方法研究

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激光杂志 2010年第4期31卷 24-26页

作者：金涛贾宏志 NAGAL Norihiro FUJII Yusaku MARU Koichi shimada kazuhito 上海市现代光学系统重点实验室上海理工大学光电信息与计算机工程学院上海200093 Department of Electronic Engineering Faculty of Engineering Gunma University Gunma 276- 8515 Japan Medical Operations Japan Aerospace Exploration Agency （JAXA） JAXA Houston Office Houston 77058 USA

文章研究了在运动状态下提取目标匹配点圆盘及其圆心的方法。对视频流采用背景差和相邻帧差法获得运动物体的运动参数,采用随机Hough变换对较小区域进行圆检测,检测的结果中包含真圆和假圆。在运动过程中随着光照和位置的变化真假圆圆... 详细信息

文章研究了在运动状态下提取目标匹配点圆盘及其圆心的方法。对视频流采用背景差和相邻帧差法获得运动物体的运动参数,采用随机Hough变换对较小区域进行圆检测,检测的结果中包含真圆和假圆。在运动过程中随着光照和位置的变化真假圆圆内的灰度也发生变化,因为本文结合圆内灰度值统计来判别目标圆。并根据判别出的目标圆来计算出圆盘的圆心。实验验证了上述方法的有效性,给出了检测结果并统计了目标圆心在整个视频中的像素运动轨迹。

关键词：光学测量运动估计随机Hough变换圆形检测灰度变化

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微重力下三维运动姿态检测系统

微重力下三维运动姿态检测系统

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上海市激光学会2009年学术年会

作者：金涛贾宏志 YAMAMOTO Ryo NAGAI Norihiro FUJII Yusaku MARU Koichi OHTA Naoya shimada kazuhito 上海理工大学光电于计算机工程学院上海市现代化光学重点实验室 Department of Electronic Engineering Faculty of EngineeringGunma University Department of Computer Science Faculty of EngineeringGunma University Medical Operations Japan Aerospace Exploration Agency(JAXA)JAXA Houston Office

本文给出了如何利用双目立体视觉测量技术测量微重力下人体运动姿态,实现了抛物线飞行试验中对人体三维空间运动的测量。文章阐述了摄像机标定和二维空间与三维空间转换的关系。首先,通过坐标转换关系得出图像像素坐标与世界坐标的关系... 详细信息

本文给出了如何利用双目立体视觉测量技术测量微重力下人体运动姿态,实现了抛物线飞行试验中对人体三维空间运动的测量。文章阐述了摄像机标定和二维空间与三维空间转换的关系。首先,通过坐标转换关系得出图像像素坐标与世界坐标的关系。然后,通过摄像机标定算法计算出两个摄像机的内外参数,最后,由像素坐标和世界坐标的转换关系计算出目标点的世界坐标。文章结合实际情况对所设计的算法加以改进,并给出相应的数据验证了改进型算法的正确性和利用双目立体视觉测量技术测量微重力下人体姿态的可行性。

关键词：运动检测摄像机标定微重力三维运动姿态

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Therapeutic efficacy of ramucirumab after lenvatinib for post-progression treatment of unresectable hepatocellular carcinoma

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Gastroenterology Report 2021年第2期9卷 133-138,I0002页

作者： Atsushi Hiraoka Takashi Kumada Toshifumi Tada Chikara Ogawa Joji Tani Shinya Fukunishi Masanori Atsukawa Masashi Hirooka Kunihiko Tsuji Toru Ishikawa Koichi Takaguchi Kazuya Kariyama Ei Itobayashi Kazuto Tajiri Noritomo shimada Hiroshi Shibata Hironori Ochi kazuhito Kawata Hidenori Toyoda Hideko Ohama Kazuhiro Nouso Akemi Tsutsui Takuya Nagano Norio Itokawa Korenobu Hayama Taeang Arai Michitaka Imai Yohei Koizumi Shinichiro Nakamura Kojiro Michitaka Yoichi Hiasa Masatoshi Kudo Gastroenterology Center Ehime Prefectural Central HospitalEhimeJapan Department of Gastroenterology and Hepatology Ogaki Municipal HospitalGifuJapan Department of Internal Medicine Himeji Red Cross HospitalHyogoJapan Department of Gastroenterology and Hepatology Takamatsu Red Cross HospitalTakamatsuJapan Department of Gastroenterology and Hepatology Kagawa universityKagawaJapan Department of Gastroenterology Osaka Medical CollegeOsakaJapan Division of Gastroenterology and Hepatology Department of Internal MedicineNippon Medical SchoolTokyoJapan Department of Gastroenterology and Metabology Ehime University Graduate School of MedicineEhimeJapan Center of Gastroenterology Teine Keijinkai HospitalSapporoJapan Department of Gastroenterology Saiseikai Niigata HospitalNiigataJapan Department of Hepatology Kagawa Prefectural Central HospitalTakamatsuJapan Department of Gastroenterology Okayama City HospitalOkayamaJapan Department of Gastroenterology Asahi General HospitalAsahiJapan Department of Gastroenterology Toyama University HospitalToyamaJapan Division of Gastroenterology and Hepatology Otakanomori HospitalKashiwaJapan Department of Gastroenterology Tokushima Prefectural Central HospitalTokushimaJapan Hepato-biliary Center Matsuyama Red Cross HospitalMatsuyamaJapan Department of Hepatology Hamamatsu University School of MedicineHamamatsuJapan Department of Gastroenterology Kindai UniversityOsakaJapan

Background:Lenvatinib is used for unresectable hepatocellular carcinoma(u-HCC)as first-line,as well as second-and third-line therapy in *** evaluated the therapeutic efficacy of newly developed ramucirumab when given after lenvatinib for post-progression ***:Of 385 patients with u-HCC and treated with lenvatinib at 16 different institutions in Japan between May 2018 and January 2020,28 who received ramucirumab as the next treatment were enrolled and therapeutic responses were evaluated in a retrospective ***:The median age of the 28 patients given ramucirumab was 70 years and the median albumin-bilirubin score *** the 28 patients,23 were male,21 were classified as Child-Pugh A and 7 as Child-Pugh B,and 25 were Barcelona Clinic Liver Cancer Stage *** was given as second-line therapy in 14,third-line in 9,and fourth-line in *** response was obtained in only 26 patients;the objective response rate was 3.8%(1/26)and the disease-control rate was 42.3%(11/26),with a median period to progression of 2.0 *** reasons for discontinuation of ramucirumab were progression of disease in 16 and Grade 3 adverse events(gastrointestinal bleeding,ascites)in ***:The anticipated therapeutic efficacy of ramucirumab for post-progression treatment following lenvatinib was not seen in our early experience.

关键词： hepatocellular carcinoma ramucirumab lenvatinib sorafenib

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