-
公开(公告)号：US4653013A
公开(公告)日：1987-03-24
申请号：US672609
申请日：1984-11-19
CPC分类号： G06T3/4007 , H04N1/3935 , Y10S347/90
摘要： The values of pixels in a new image matrix are obtained by mapping pixels of the new matrix in the old matrix and then using polynomial interpolation of a plurality of values of pixels in the old matrix to obtain values of interim pixels in the new matrix and then using polynomial interpolation of a plurality of interim values to obtain final values of pixels in the new matrix. A precalculated table of weighting coefficients based on offset of a new pixel from an adjacent old pixel is used to expedite the polynomial interpolation.
摘要翻译： 通过在旧矩阵中映射新矩阵的像素，然后使用旧矩阵中的多个像素值的多项式插值来获得新图像矩阵中的像素的值，以获得新矩阵中的中间像素值 使用多个中间值的多项式插值来获得新矩阵中的像素的最终值。 使用基于来自相邻旧像素的新像素的偏移的加权系数的预先计算表来加速多项式插值。
-
公开(公告)号：US4454507A
公开(公告)日：1984-06-12
申请号：US336751
申请日：1982-01-04
摘要： A system for writing cursors on a raster scanned television screen that uses the microprocessor in a display controller to produce blocks of data defining the parameters of vectors that compose the cursor. The blocks are put in a first-in first-out memory during a vertical blanking inerval or during active picture time. Each block specifies where writing of a cursor segment is to start and stop on a horizontal scan line and it also specifies a repeat count that indicates the number of lines on which the segment is to be written. Each block contains a delta value to indicate how much, if any each segment is to be displaced left or right from line to line so vertical and angulated vertical vectors can be produced. The blocks are read out of the memory consecutively by a circuit that converts the segment start and stop data to pixel counts. Pixel counters determine the writing start and stop points. When the number of horizontal lines on which segments are written equals the repeat count, the next block is processed.
摘要翻译： 用于在光栅扫描的电视屏幕上写入光标的系统，其使用显示控制器中的微处理器产生定义组成光标的向量参数的数据块。 在垂直消隐异常或激活的图像时间期间，这些块被置于先进先出的存储器中。 每个块指定在水平扫描行上开始和停止光标段的写入位置，并且还指定重复计数，该重复计数指示段要写入的行数。 每个块包含一个增量值，用于指示多少（如果有的话）每个段要从一行到另一个位移左或右，因此可以产生垂直和垂直的垂直向量。 通过将段开始和停止数据转换为像素数的电路连续地从存储器中读出块。 像素计数器确定写入起点和停止点。 当写入片段的水平线数等于重复计数时，处理下一个块。
-
3.发明授权High speed communication apparatus for computerized axial tomography (CAT) scanners with matching receiver 失效用于具有匹配接收器的计算机轴向计算机（CAT）扫描仪的高速通信装置
公开(公告)号：US5208581A
公开(公告)日：1993-05-04
申请号：US796162
申请日：1991-11-22
申请人： Arthur K. Collins
发明人： Arthur K. Collins
摘要： A high speed communication apparatus for a Computerized Axial Tomography (CAT) scanner utilizes large diameter slip rings to permit continuous rotation of a rotatable gantry. A communication signal is applied at a first point on one slip ring, and is terminated by a resistive termination point 180.degree. opposite the driving point. The communication signal may then be received at any point on the slip ring by a receive connection and a matching receive connection which are 180.degree. opposite one another. The drive and termination connections to the slip ring may be made by brushes, with the receive and matching receive connections being made by a physical connection to the slip ring. Alternately, the drive and terminate connections may be made by physical contact, with the receive and matching receive connections being made by brushes.
-
4.发明授权
公开(公告)号：US4839805A
公开(公告)日：1989-06-13
申请号：US552665
申请日：1983-11-17
IPC分类号： G06F3/033
CPC分类号： G06F3/033 , Y10T74/20201
摘要： Dual control of image level and window of a display is accomplished by rotation of a single trackball. Rotation of the trackball within a first band including the X axis controls one parameter, and rotation of the trackball in a second band including the Y axis controls a second parameter. No changes are made in the parameters in response to rotation of the trackball in a third deadband laying between the first band and second band. The operator of a tomography system can readily change display parameters by rotation of the trackball while viewing the display.
摘要翻译： 通过单个轨迹球的旋转来实现显示器的图像级别和窗口的双重控制。 轨迹球在包括X轴的第一频带内的旋转控制一个参数，轨迹球在包括Y轴的第二频带中的旋转控制第二参数。 响应于位于第一带和第二带之间的第三死区中的轨迹球的旋转，在参数中不做任何改变。 断层扫描系统的操作者可以通过观看显示器的轨迹球的旋转来容易地改变显示参数。
-
公开(公告)号：US5473654A
公开(公告)日：1995-12-05
申请号：US265547
申请日：1994-06-24
IPC分类号： A61B6/03 , G06T1/00 , G06T11/00 , G01N23/083
CPC分类号： G06T11/006 , G06T2211/421 , Y10S378/901
摘要： An x-ray CT system acquires a series of views during a scan and reconstructs a slice image by backprojecting the filtered projection data from each acquired view. Backprojection is facilitated by employing a Cordic processor that produces the angle (.gamma.) and distance (L) of each pixel location from the x-ray source. The angle (.gamma.) selects the proper value from the filtered projection data, and this value is divided by the square of the distance (L) to arrive at a value used to update the slice image pixel value.
摘要翻译： X射线CT系统在扫描期间获取一系列视图，并通过从每个获取的视图反投影过滤的投影数据来重构切片图像。 通过使用Cordic处理器来促进背投影，该Cordic处理器从x射线源产生每个像素位置的角度（γ）和距离（L）。 角度（gamma）从滤波后的投影数据中选择合适的值，并将该值除以距离（L）的平方，得到用于更新切片图像像素值的值。
-
6.发明授权High speed communication apparatus for computerized axial tomography (CAT) scanners 失效用于计算机轴向断层扫描（CAT）扫描仪的高速通信设备
公开(公告)号：US5018174A
公开(公告)日：1991-05-21
申请号：US439904
申请日：1989-11-20
申请人： Arthur K. Collins
发明人： Arthur K. Collins
摘要： A high speed communication apparatus for a computerized axial tomography (CAT) scanner utilizes large diameter slip rings to permit continuous rotation of a rotatable gantry. A communication signal is applied at a first point on one slip ring, and is terminated by a resistive termination at a point 180.degree. opposite the driving point. The communication signal may then be received at any point on the slip ring. The drive and termination connections to the slip ring may be made by brushes, with the receive connection being made by a physical connection to the slip ring. Alternately, the drive and terminate connection may be made by physical contact, with the receive connection being made by a brush.
-
公开(公告)号：US4438495A
公开(公告)日：1984-03-20
申请号：US321008
申请日：1981-11-13
CPC分类号： G06T5/009 , G06T2207/10081 , G06T2207/10116 , Y10S378/901
摘要： Apparatus for applying a gamma correction to digital CT numbers at a selected level and within a window. A memory is loaded sequentially with the gamma correction lookup table. At the start a counter generates a sequence of addresses, in response to clock pulses. These are addresses to another memory. Simultaneously, a variable address generator addresses the gamma lookup table memory to effect transfer of the gamma correction data to the other memory (window-gamma lookup table) at locations that are represented by the ratio of the locations in the gamma lookup table to the address in the window-gamma table. To read out and produce an image, the window black value is subtracted from the stored CT numbers in sequence. The resulting differences constitute addresses to the window-gamma lookup table whose output is then the gamma corrected values for CT numbers in the window. This digitized data is converted to analog video signals for driving a television monitor that displays the image.
摘要翻译： 用于在选定的级别和窗口内对数字CT号码应用伽马校正的装置。 使用伽马校正查找表顺序加载存储器。 开始时，响应于时钟脉冲，计数器产生地址序列。 这些是另一个内存的地址。 同时，可变地址发生器寻址伽马查找表存储器，以在由伽马查找表中的位置与地址的比率表示的位置处，将伽马校正数据传送到另一个存储器（窗 - 伽马查找表） 在窗口-γ表中。 为了读出并产生图像，依次从存储的CT编号中减去窗口黑色值。 所得到的差异构成了窗口伽马查找表的地址，其输出是窗口中CT编号的伽马校正值。 该数字化数据被转换为模拟视频信号，用于驱动显示图像的电视监视器。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.014 秒)
