中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

32 records (took 0.021 seconds)

    METHOD, APPARATUS AND SYSTEM FOR RECONSTRUCTING IMAGES OF 3D SURFACE
    23.
    发明申请
    METHOD, APPARATUS AND SYSTEM FOR RECONSTRUCTING IMAGES OF 3D SURFACE 审中-公开

    公开(公告)号：US20190295250A1

    公开(公告)日：2019-09-26

    申请号：US16316487

    申请日：2017-05-03

    Applicant: Nuctech Company Limited

    Inventor： Li Zhang ,  Sen Wang ,  Zhiqiang Chen ,  Yuxiang Xing ,  Xin Jin

    IPC: G06T7/00 ,  G06T7/33

    Abstract: The present disclosure discloses a method, an apparatus and a system for reconstructing an image of a three-dimensional surface. The method comprises the following steps of: constructing a three-dimensional model of the three-dimensional surface using X-ray imaging data obtained by imaging the three-dimensional surface with X-ray and extracting three-dimensional coordinate parameters of feature points; constructing one or more two-dimensional posture images of the three-dimensional surface using visible light imaging data obtained by imaging the three-dimensional surface with visible lights, and extracting two-dimensional coordinate parameters of feature points from each of the two-dimensional posture images; establishing a mapping relationship between the two-dimensional posture image and the three-dimensional model by matching the three-dimensional coordinate parameters and the two dimensional coordinate parameters of the feature points in each of the two-dimensional posture image; and filling the one or more two-dimensional posture image onto the three-dimensional model utilizing the mapping relationship established for each of the two dimensional posture images to form a reconstructed image of the three-dimensional surface, wherein the X-ray imaging data and the visible light imaging data of the three-dimensional surface along the same orientation are simultaneously captured.

    Multi-energy spectrum X-ray grating-based imaging system and imaging method
    24.
    发明授权
    Multi-energy spectrum X-ray grating-based imaging system and imaging method 有权

    公开(公告)号：US10267753B2

    公开(公告)日：2019-04-23

    申请号：US15328881

    申请日：2015-10-28

    Applicant: Nuctech Company Limited

    Inventor： Li Zhang ,  Zhiqiang Chen ,  Xiaolei Jiang ,  Xiaohua Zhu ,  Xin Jin

    IPC: G01N23/04 ,  G01N23/046 ,  G01N23/087 ,  A61B6/00 ,  A61B6/03

    Abstract: The present disclosure relates to a multi-spectrum X-ray grating-based imaging system and imaging method. In one illustrative implementation, an exemplary multi-spectrum X-ray grating-based imaging system according to the present disclosure may comprise an incoherent X-ray source for emitting X-rays to irradiate an object to be detected, a grating module comprising a first absorption grating and a second absorption grating which are disposed in parallel to each other and are sequentially arranged in an X-ray propagation direction, and an energy-resolved detecting device for receiving the X-rays that have passed through the first absorption grating and the second absorption grating.

    CT systems and methods thereof
    25.
    发明授权
    CT systems and methods thereof 有权

    公开(公告)号：US09786041B2

    公开(公告)日：2017-10-10

    申请号：US14576705

    申请日：2014-12-19

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Zhiqiang Chen ,  Li Zhang ,  Ji Zhao ,  Qingping Huang ,  Xin Jin

    IPC: G06K9/00 ,  G06T7/00 ,  G01V5/00

    CPC classification number: G06T7/0002 ,  G01V5/005 ,  G06T2207/30112

    Abstract: A CT system and method thereof are discloses. The system includes: a fixed multi-plane multi-source X-ray generation device and a control system thereof that provide X-ray source used in luggage inspection; a single-energy, pseudo-dual-energy or spectral detector system and data transfer system that receive perspective data of X ray penetrating the luggage, and transfer the data to a computer for processing; a conveyor and a control system thereof that control a speed for moving the luggage forth and back, and perform tomogram scanning; and a host computer system that performs tomogram reconstruction and provides man-machine interaction. The system takes full advantage of characteristics, such as high speed and stability, brought by the distributed ray sources which replace the normal slip ring technology. The system also adopts the idea of inverse-geometry CT, and reduces detector area and cost by increasing the number of ray sources. With the reduction of detector area, cone-beam artifacts and cup-shape artifacts caused by scattering are also reduced, and influence of the oblique effect on registration of dual-energy data is suppressed.

    Spiral CT systems and reconstruction methods
    26.
    发明授权
    Spiral CT systems and reconstruction methods 有权
    螺旋CT系统和重建方法

    公开(公告)号：US09466137B2

    公开(公告)日：2016-10-11

    申请号：US14708866

    申请日：2015-05-11

    Applicant: Nuctech Company Limited ,  Tsinghua University

    Inventor： Li Zhang ,  Zhiqiang Chen ,  Le Shen ,  Yuxiang Xing ,  Xin Jin ,  Qingping Huang

    IPC: G06K9/00 ,  G06T11/00 ,  A61B6/03 ,  A61B6/02 ,  A61B6/00 ,  G06T7/00

    CPC classification number: G06T11/006 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/4266 ,  A61B6/5205 ,  G06T7/0012 ,  G06T2207/10081 ,  G06T2207/30004 ,  G06T2211/421

    Abstract: The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.

    Abstract translation: 本公开公开了一种螺旋CT系统及其重建方法。 在一些实施例中，提出通过对使用螺旋CT系统获得的投影数据的互补投影数据进行加权来补偿由于大音调而丢失的数据。 数据补充后，将投影数据重新设置为锥形平行光束数据，对重定位数据进行锥角余弦加权和一维滤波，最后在滤波数据上实现平行光束反投影，获得 重建图像。 在一些实施例中，利用上述方法，在检测器的现有区域和滑环的现有速度不变的情况下，带的速度可以增加多于一次，从而提高了传感器的通过率 行李保持重建图像的质量不变。

    Dual-source security inspection CT scanning system and scanning method
    27.
    发明申请
    Dual-source security inspection CT scanning system and scanning method 审中-公开
    双源安全检测CT扫描系统及扫描方式

    公开(公告)号：US20160178789A1

    公开(公告)日：2016-06-23

    申请号：US14757400

    申请日：2015-12-23

    Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

    Inventor： Li Zhang ,  Mingzhi Hong ,  Qingping Huang ,  Xin Jin

    IPC: G01V5/00 ,  G01N23/04

    CPC classification number: G01V5/005 ,  G01N23/046 ,  G01V5/0041

    Abstract: The present disclosure provides a dual-source security inspection CT scanning system and scanning method. The system includes two sets of scan imaging systems, wherein each set of the scan imaging systems has its own separate ray source and detector, the two sets of scan imaging systems are juxtaposed on a same rotary mechanism, and a predetermined interval is provided between imaging planes of the two sets of scan imaging systems. The present disclosure ensures the two sets of imaging optical paths do not interfere with each other, therefore effectively avoiding the problem of scattering mutual interference between the dual sources of the dual-source CT scanning system in the prior art.

    Abstract translation: 本公开提供了一种双源安全检查CT扫描系统和扫描方法。 该系统包括两组扫描成像系统，其中每组扫描成像系统具有其自己的单独的光源和检测器，两组扫描成像系统并置在相同的旋转机构上，并且在成像之间提供预定间隔 两组扫描成像系统的平面。 本公开确保了两组成像光路不彼此干涉，因此有效地避免了现有技术中双源CT扫描系统的双重源之间散射相互干扰的问题。

    IMAGE DISPLAY METHODS
    28.
    发明申请
    IMAGE DISPLAY METHODS 有权
    图像显示方法

    公开(公告)号：US20150332498A1

    公开(公告)日：2015-11-19

    申请号：US14711949

    申请日：2015-05-14

    Applicant: Nuctech Company Limited

    Inventor： Li Zhang ,  Zhiqiang Chen ,  Qingping Huang ,  Yunda Sun ,  Zhi Tang ,  Le Shen ,  Hu Tang ,  Qianlu Ren ,  Xin Jin

    IPC: G06T17/00 ,  G06T11/00 ,  G06T19/00 ,  A61B6/03 ,  A61B6/00

    CPC classification number: G06T17/00 ,  A61B6/032 ,  A61B6/463 ,  A61B6/466 ,  A61B6/5205 ,  A61B6/5223 ,  G01N23/046 ,  G06T11/003 ,  G06T19/003 ,  G06T2207/10081 ,  G06T2207/10124 ,  G06T2207/30004 ,  G06T2207/30196 ,  G06T2210/41 ,  G06T2211/436 ,  G06T2219/016 ,  G06T2219/028 ,  G06T2219/2004

    Abstract: The present disclosure discloses an image display method in a CT system. The method comprises: implementing CT scanning on an inspected object, to obtain CT projection data; organizing the CT projection data according to a predetermined interval; extracting basic data from the organized CT projection data by using a fixed angle as a start angle and using 360 degrees as an interval; forming a DR image based on the extracted basic data; reconstructing a three-dimensional image of the inspected object from the CT projection data; and displaying the DR image and the reconstructed three-dimensional image on a screen at the same time. In the solution, the CT data is processed to obtain DR data. After the DR data is obtained, a DR image is obtained directly using a DR data processing algorithm. This enables an image recognizer to more accurately and more rapidly inspect goods carried by a passenger using the existing experience in image recognition of the DR image.

    Abstract translation: 本公开公开了一种CT系统中的图像显示方法。 该方法包括：对检测对象进行CT扫描，获得CT投影数据; 根据预定间隔组织CT投影数据; 通过使用固定角度作为起始角度并以360度为间隔从有组织的CT投影数据提取基本数据; 基于所提取的基本数据形成DR图像; 从CT投影数据重构检查对象的三维图像; 同时在屏幕上显示DR图像和重构的三维图像。 在解决方案中，处理CT数据以获得DR数据。 在获得DR数据之后，使用DR数据处理算法直接获得DR图像。 这使得图像识别器可以使用DR图像的图像识别中的现有经验更准确和更快速地检查乘客携带的货物。

Patent Agency Ranking