公开(公告)号：US10481381B2

公开(公告)日：2019-11-19

申请号：US14902996

申请日：2014-06-25

Applicant: The University of Tokyo

Inventor： Hiromasa Oku ,  Masatoshi Ishikawa ,  Koseki Kobayashi

IPC: G02B23/14 ,  H04N5/225 ,  H04N5/232 ,  G03B17/56 ,  G02B17/00 ,  G02B26/08 ,  G02B27/00

Abstract: An object of the present invention is to widen a range in which line of sight change is possible, particularly in a pan direction. According to the present invention it is possible to acquire high line of sight changing speed. A pan mirror is capable of rotation in forward and reverse directions about a third rotational axis. Also, the third rotational axis extends in a direction that is substantially parallel to a line of sight direction directed from a tilt direction control section to the pan mirror. An angle α formed by the pan mirror and the third rotational axis is set in a range 0°

公开(公告)号：US20180314058A1

公开(公告)日：2018-11-01

申请号：US15767988

申请日：2016-09-06

Applicant: The University of Tokyo

Inventor： Masatoshi Ishikawa ,  Lihui Wang ,  Tomohiko Hayakawa

IPC: G02B26/08 ,  G02F1/29 ,  F21V14/02

CPC classification number: G02B26/08 ,  G02B26/10

Abstract: Controlling the position of a light beam uses a dielectric elastomer itself as an optical element. By controlling the position of a light beam, it is possible to maintain high resolution, even where an object is at a distance. The main body is constituted by a dielectric elastomer. This dielectric elastomer is made substantially transparent to a light beam that is an object of control. The dielectric elastomer is made to have a refractive index that is different than a refractive index of a medium that exists around the main body and that the light beam will pass through. The feed section is configured to cause a change in the thickness of the main body by applying a voltage to the main body.

公开(公告)号：US20160088231A1

公开(公告)日：2016-03-24

申请号：US14890150

申请日：2014-04-28

Applicant: THE UNIVERSITY OF TOKYO

Inventor： Hiromasa Oku ,  Keiko Yokoyama ,  Masatoshi Ishikawa

IPC: H04N5/232 ,  G06K9/46 ,  G06T7/20 ,  G06T7/00

CPC classification number: H04N5/23296 ,  G01S3/7864 ,  G06K9/4609 ,  G06K9/4652 ,  G06T7/11 ,  G06T7/174 ,  G06T7/194 ,  G06T7/20 ,  G06T2207/20224 ,  G06T2207/30244 ,  H04N5/2259 ,  H04N5/23216

Abstract: This invention provides a technology that allows the acquisition of background differentials using images acquired by a camera, the viewpoint of which moves. First, said camera acquires a background image, i.e. an image that does not contain a target object. Using information on the line-of-sight direction and viewpoint position of the camera, position information for pixels in the background image is transformed to polar-coordinate information Next, the camera acquires an object image. Using information on the line-of-sight direction and viewpoint position of the camera, position information for pixels in the object image is transformed to polar-coordinate information. The polar-coordinate information for the pixels in the object image is used to identify a target background, said target background being the part of the background image in an angle region corresponding to the object image. By comparing the object image and the target background, the differential therebetween is extracted.

Abstract translation: 本发明提供一种技术，其允许使用由其视点移动的相机获取的图像来获取背景差异。 首先，所述相机获取背景图像，即不包含目标对象的图像。 使用摄像机的视线方向和视点位置的信息，将背景图像中的像素的位置信息变换为极坐标信息。接下来，摄像机获取对象图像。 使用摄像机的视线方向和视点位置的信息，将对象图像中的像素的位置信息变换为极坐标信息。 用于对象图像中的像素的极坐标信息用于识别目标背景，所述目标背景是与对象图像对应的角度区域中的背景图像的一部分。 通过比较对象图像和目标背景，提取其间的差分。

公开(公告)号：US20150167447A1

公开(公告)日：2015-06-18

申请号：US14109729

申请日：2013-12-17

Applicant: The University of Tokyo ,  Schlumberger Technology Corporation

Inventor： Theodorus Tjhang ,  Bonnie Powell ,  Yutaka Imasato ,  Yoshihiro Watanabe ,  Masatoshi Ishikawa

IPC: E21B47/00 ,  E21B47/09 ,  E21B47/12 ,  H04N7/18

CPC classification number: E21B47/0002 ,  E21B47/12 ,  E21B47/18

Abstract: Downhole imaging systems and methods are disclosed herein. An example method includes projecting flushing fluid into an optical field of view of an imaging system disposed on a downhole tool. The example method also includes directing a pattern of light onto a target in the optical field of view via a light source of the imaging system and determining three-dimensional shape information of the target based on the light directed from the target and received via an image detection plane of the imaging system. The example method further includes determining a characteristic of the target based on the three-dimensional shape information.

Abstract translation: 本文公开了井下成像系统和方法。 示例性方法包括将冲洗流体投射到设置在井下工具上的成像系统的光学视场中。 该示例性方法还包括通过成像系统的光源将光图案定向在光学视场中的目标上，并且基于从目标引导并经由图像接收的光来确定目标的三维形状信息 成像系统的检测平面。 该示例方法还包括基于三维形状信息来确定目标的特征。

公开(公告)号：US20150085101A1

公开(公告)日：2015-03-26

申请号：US14038736

申请日：2013-09-26

Applicant: The University of Tokyo ,  Schlumberger Technology Corporation

Inventor： Theodorus Tjhang ,  Masatoshi Ishikawa

IPC: E21B47/00 ,  H04N5/225

CPC classification number: E21B47/0002 ,  E21B47/01 ,  H04N5/2251 ,  H04N5/2252 ,  H04N2005/2255

Abstract: Drill bit assembly imaging systems and methods are disclosed herein. An example method disclosed herein includes directing light conveying an image of a target through a portion of a drill bit assembly and capturing the image via an image sensor disposed inside the drill bit assembly. The example method also include determining drilling information based on the image via an image processor disposed inside the drill bit assembly.

Abstract translation: 本文公开了钻头组装成像系统和方法。 本文公开的示例性方法包括引导光通过钻头组件的一部分传送靶的图像并经由设置在钻头组件内部的图像传感器捕获图像。 示例性方法还包括经由设置在钻头组件内部的图像处理器基于图像来确定钻孔信息。