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    • 22. 发明申请
      US20060029181A1 UPRIGHT CT SCANNER 失效
    • UPRIGHT CT SCANNER
    • 直升机扫描仪
    • US20060029181A1
    • 2006-02-09
    • US10911782
    • 2004-08-03
    • William Chen , Jason Chen
    • William Chen , Jason Chen
    • A61B6/00
    • A61B6/04 , A61B6/00 , A61B6/4435
    • In an upright CT scanner, an X-ray source and a two-dimensional digital X-ray detector are mounted on a rotating platform with a vertical axis of rotation. During scanning, the X-ray source and the detector are on opposite sides of the rotational axis for orbiting about a body to thereby scan it with pyramid-shaped X-ray beam. During scanning, the source and detector can be jointly translated along a horizontal axis that is perpendicular to the rotation axis and parallel to the detector surface, to scan a specific part of a body that is not centered or a body that is too large. The mounting height and distance of source and the detector can also be adjusted.
    • 在立式CT扫描仪中，X射线源和二维数字X射线检测器安装在具有垂直旋转轴的旋转平台上。 在扫描期间，X射线源和检测器位于旋转轴的相对侧上，用于围绕身体轨道运动，从而用金字塔形X射线束扫描X射线源和检测器。 在扫描期间，源和检测器可以沿着垂直于旋转轴并平行于检测器表面的水平轴共同平移，以扫描未居中的身体的特定部分或太大的身体。 源和检测器的安装高度和距离也可以调整。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 23. 发明授权
      US06950473B2 Hybrid technique for reducing blocking and ringing artifacts in low-bit-rate coding 有权
    • Hybrid technique for reducing blocking and ringing artifacts in low-bit-rate coding
    • 用于减少低比特率编码中的阻塞和振铃伪影的混合技术
    • US06950473B2
    • 2005-09-27
    • US10176994
    • 2002-06-21
    • Changick Kim , William Chen , Vasudev Bhaskaran
    • Changick Kim , William Chen , Vasudev Bhaskaran
    • H04N7/26 , H04N7/30 , H04N7/12
    • H04N19/86
    • A power-scalable hybrid technique to reduce blocking and ringing artifacts in low bit-rate block-based video coding is employed in connection with a modified decoder structure. Fast inverse motion compensation is applied directly in the compressed domain, so that the transform (e.g., DCT) coefficients of the current frame can be reconstructed from those of the previous frame. The spatial characteristics of each block is calculated from the DCT coefficients, and each block is classified as either low-activity or high-activity. For each low-activity block, its DC coefficient value and the DC coefficient values of the surrounding eight neighbor blocks are exploited to predict low frequency AC coefficients which reflect the original coefficients before quantization in the encoding stage. The predicted AC coefficients are inserted into the low activity blocks where blocking artifacts are most noticeable. Subject to available resources, this may be followed by spatial domain post-processing, in which two kinds of low-pass filters are adaptively applied, on a block-by-block basis, according to the classification of the particular block. Strong low-pass filtering is applied in low-activity blocks where the blocking artifacts are most noticeable, whereas weak low-pass filtering is applied in high-activity blocks where ringing noise as well as blocking artifacts may exist. In low activity blocks, the blocking artifacts are reduced by one dimensional horizontal and vertical low-pass filters which are selectively applied in either the horizontal and/or vertical direction depending on the locations and absolute values of the predicted AC coefficients. In high activity blocks, de-blocking and de-ringing is conducted by 2- or 3-tap filters, applied horizontally and/or vertically, which makes the architecture simple.
    • 结合经修改的解码器结构采用功率可扩展的混合技术来减少低比特率基于块的视频编码中的阻塞和振铃伪影。 快速逆运动补偿直接应用在压缩域中，使得当前帧的变换（例如DCT）系数可以从先前帧的变换（例如，DCT）系数重构。 根据DCT系数计算每个块的空间特性，将每个块分类为低活动度或高活动度。 对于每个低活动块，利用其DC系数值和周围八个相邻块的DC系数值来预测在编码阶段中反映量化之前的原始系数的低频AC系数。 将预测的AC系数插入到低活动块中，其中块伪影最显着。 根据可用资源，可以跟随空间域后处理，其中根据特定块的分类，在逐块的基础上自适应地应用两种低通滤波器。 强低通滤波被应用在低活动性块中，其中块伪影是最显着的，而弱低通滤波被应用于可能存在振铃噪声和块伪影的高活动块中。 在低活动性块中，根据预测的AC系数的位置和绝对值，在水平和/或垂直方向选择性地施加一维水平和垂直低通滤波器来减少块伪影。 在高活动性块中，通过水平和/或垂直施加的2或3抽头滤波器进行解块和解除振铃，这使得架构变得简单。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 24. 发明授权
      US5179716A Programmable expandable controller with flexible I/O 失效
    • Programmable expandable controller with flexible I/O
    • 可编程可扩展控制器，具有灵活的I / O
    • US5179716A
    • 1993-01-12
    • US370148
    • 1989-06-21
    • Om P. Agrawal , Arthur H. Khu , William Chen
    • Om P. Agrawal , Arthur H. Khu , William Chen
    • G06F9/22 , G06F9/26
    • G06F9/264 , G06F9/223
    • A programmable controller which combines microaddress control logic, memory, a microinstruction decoder, and I/O into a unitary, integrated device. The microaddress control logic is responsive to sequencing signals developed by the microinstruction decoder, and includes an address generator which develops the program address. The memory, which can be either PROM or RAM, is addressed by the address and outputs a microinstruction word to a pipeline register. The microinstruction word has an internal field which is coupled to inputs of the microaddress control logic and the microinstruction decoder, and a control field which is coupled to an output buffer. The output buffer includes multiplexers which permit either the program count or the control field to be multiplexed to the output pins of the device. When the program address is multiplexed to the output pins, the programmable controller can address external memory devices.
    • 可编程控制器，将微地址控制逻辑，存储器，微指令解码器和I / O组合到一体的集成器件中。 微地址控制逻辑响应于由微指令解码器开发的排序信号，并且包括开发程序地址的地址发生器。 存储器可以是PROM或RAM，由地址寻址，并将微指令字输出到流水线寄存器。 微指令字具有耦合到微地址控制逻辑和微指令解码器的输入的内部场，以及耦合到输出缓冲器的控制场。 输出缓冲器包括允许程序计数或控制字段复用到器件的输出引脚的多路复用器。 当程序地址复用到输出引脚时，可编程控制器可以寻址外部存储器件。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 28. 发明授权
      US07991222B2 Method and apparatus for high resolution 3D imaging as a function of camera position, camera trajectory and range 有权
    • Method and apparatus for high resolution 3D imaging as a function of camera position, camera trajectory and range
    • 作为摄像机位置，摄像机轨迹和范围的函数的高分辨率3D成像的方法和装置
    • US07991222B2
    • 2011-08-02
    • US12701371
    • 2010-02-05
    • Jerry Dimsdale , Andrew Lewis , William Chen
    • Jerry Dimsdale , Andrew Lewis , William Chen
    • G06K9/00 , H04N5/225
    • G01C15/002 , G01C11/06 , G01C21/16 , G01S17/89
    • A system and method for imaging a three-dimensional scene having one or more objects. The system includes a light source, a detector array, a timing circuit, an inertial guidance system and a processor connected to the timing circuit and the inertial guidance system. The light source generates an optical pulse and projects the optical pulse on an object so that it is reflected as a reflected pulse. The detector array includes a plurality of detectors, wherein the detectors are oriented to receive the reflected pulse. The timing circuit determines when the reflected pulse reached detectors on the detector array. The inertial guidance system measures angular velocity and acceleration. The processor forms a composite image of the three-dimensional scene as a function of camera position and range to objects in the three-dimensional scene.
    • 一种用于对具有一个或多个对象的三维场景进行成像的系统和方法。 该系统包括光源，检测器阵列，定时电路，惯性引导系统和连接到定时电路和惯性引导系统的处理器。 光源产生光脉冲并将光脉冲投射在物体上，使其被反射为反射脉冲。 检测器阵列包括多个检测器，其中检测器被定向以接收反射的脉冲。 定时电路确定反射脉冲何时到达检测器阵列上的检测器。 惯性导向系统测量角速度和加速度。 处理器根据相机的位置和范围与三维场景中的对象形成三维场景的合成图像。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
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