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27 条记录 (耗时 0.019 秒)

    Digitally-controlled analog encrypton
    3.
    发明授权
    Digitally-controlled analog encrypton 失效
    数字控制的模拟软件

    公开(公告)号：US4389671A

    公开(公告)日：1983-06-21

    申请号：US191844

    申请日：1980-09-29

    申请人： Ronald S. Posner ,  Charles R. Burr, Jr. ,  David K. Campbell

    发明人： Ronald S. Posner ,  Charles R. Burr, Jr. ,  David K. Campbell

    IPC分类号： H04N7/167 ,  H04N7/171 ,  H04N7/16

    CPC分类号： H04N7/171 ,  H04N7/1675

    摘要： An apparatus for scrambling a television signal in which horizontal lines of the transmitted television picture are selectively inverted in accordance with the state of a pseudorandom noise generator. In order to permit correction of the throughput gain as well as the throughput offset at the receiving end of the communication link so as to obtain a desired level of picture quality, particularly in a satellite communication system, an analog calibration signal representing both black and white levels is inserted into a horizontal line of the vertical retrace interval at the transmission end of the link. This calibration signal is then detected at the receiving end of the link and the signal levels are adjusted as needed. In addition, a randomly-varying key code signal for resetting the pseudorandom noise generator is randomly inserted into another horizontal line of the vertical retrace period to control scrambling. The audio portion of the television signal is also scrambled by randomly shifting the audio carrier between first and second offset frequencies.

    摘要翻译： 一种用于对根据伪随机噪声发生器的状态选择性地反转所发送的电视图像的水平线的电视信号进行加扰的装置。 为了允许校正通信链路的接收端的吞吐量增益以及吞吐量偏移，以便获得期望的图像质量水平，特别是在卫星通信系统中，表示黑色和白色的模拟校准信号 电平被插入在链路的发送端的垂直回扫间隔的水平线中。 然后在链路的接收端检测该校准信号，并根据需要调整信号电平。 此外，用于复位伪随机噪声发生器的随机变化的键码信号被随机地插入到垂直回扫周期的另一水平线中以控制加扰。 电视信号的音频部分也通过随机移动第一和第二偏移频率之间的音频载波来加扰。

    Reflective color filter for color correction of photodetector filters
    6.
    发明授权
    Reflective color filter for color correction of photodetector filters 失效
    用于光电检测器滤色片校正的反射滤色片

    公开(公告)号：US5665963A

    公开(公告)日：1997-09-09

    申请号：US590539

    申请日：1996-01-24

    申请人： David K. Campbell

    发明人： David K. Campbell

    IPC分类号： G01J3/52 ,  G01J3/50

    CPC分类号： G01J3/513

    摘要： A color filter system for an optical system, applicable to optical systems in color image scanners, copiers, video cameras and digital cameras. The optical system includes a photosensor army, transmissive color filters on the photosensor array and a corrective reflective filter adjacent to the photosensor array. The transmissive color filters on the photosensor array are imperfect, transmitting too much visible red as well as infrared. The adjacent reflective filter compensates by suppressing longer visible red wavelengths and infrared wavelengths. The combination provides color precision with cost and manufacturing advantages relative to attempting to provide precise transmissive filters on the photosensor array or relative to providing compensation filters elsewhere in the system.

    摘要翻译： 一种用于光学系统的滤色器系统，适用于彩色图像扫描仪，复印机，摄像机和数码相机中的光学系统。 光学系统包括光传感器军团，光传感器阵列上的透射滤色器和与光电传感器阵列相邻的校正反射滤光器。 光传感器阵列上的透射滤色器是不完美的，透射太多的可见红光以及红外线。 相邻的反射滤光器通过抑制更长的可见红色波长和红外波长来补偿。 相对于在光电传感器阵列上提供精确的透射滤波器或相对于在系统中的其他地方提供补偿滤波器，该组合提供了颜色精度与成本和制造优势。

    Digital filter employing PROM for storing positive and negative impulse response values
    7.
    发明授权
    Digital filter employing PROM for storing positive and negative impulse response values 失效
    采用PROM的数字滤波器用于存储正和负脉冲响应值

    公开(公告)号：US4423488A

    公开(公告)日：1983-12-27

    申请号：US223572

    申请日：1981-01-09

    申请人： David K. Campbell

    发明人： David K. Campbell

    IPC分类号： H03H17/06 ,  G06F15/31

    CPC分类号： H03H17/06

    摘要： A digital filter, having a raised-cosine function in the frequency domain, is implemented in the time domain. For positive and negative impulse inputs, the time domain response of the corresponding frequency domain raised cosine response is created by way of a programmable read-only memory (PROM), the contents of which are selectively addressed by the combination of the contents of a shift register and a counter. The shift register contains a prescribed number of digital samples of successive data bits to be transmitted, while the counter is employed to identify or scan a plurality of successive finite filter response values, based upon the current contents of the shift register. From the memory locations of the PROM corresponding to successively generated address, values are read out representative of the overall or accumulated filter response attributable to the data bits stored in the shift register at the successive sample points determined by the contents of the counter.

    摘要翻译： 在时域中实现了具有频域中的升余弦函数的数字滤波器。 对于正脉冲输入和负脉冲输入，通过可编程只读存储器（PROM）创建相应频域升余弦响应的时域响应，其内容由移位内容的组合选择性地寻址 注册和柜台。 移位寄存器包含要发送的连续数据位的规定数量的数字样本，而根据移位寄存器的当前内容，采用计数器来识别或扫描多个连续的有限滤波器响应值。 从对应于相继产生的地址的PROM的存储器位置，读出表示归因于由计数器的内容确定的连续采样点存储在移位寄存器中的数据位的总体或累积滤波器响应的值。

    System and method for setting an image capture device to an operational mode
    8.
    发明授权
    System and method for setting an image capture device to an operational mode 失效
    用于将图像捕获设备设置为操作模式的系统和方法

    公开(公告)号：US07265790B2

    公开(公告)日：2007-09-04

    申请号：US10614322

    申请日：2003-07-07

    申请人： Amy E. Battles ,  David K. Campbell

    发明人： Amy E. Battles ,  David K. Campbell

    IPC分类号： H04N5/225

    CPC分类号： H04N5/23245 ,  H04N5/232

    摘要： In an embodiment, a method sets an image capture device to one of a plurality of available operational modes for the image capture device. The method comprises determining an angle of pitch orientation of the image capture device, and setting the image capture device to the one of the plurality of operational modes if the angle of pitch orientation is within a predetermined angle range associated with the one of the plurality of operational modes.

    摘要翻译： 在一个实施例中，一种方法将图像捕获设备设置为用于图像捕获设备的多种可用操作模式之一。 该方法包括确定图像拍摄装置的俯仰方向的角度，并且如果俯仰方向的角度在与多个操作模式中的一个相关联的预定角度范围内，则将图像拍摄装置设置为多个操作模式中的一个 操作模式。

    Film scanner with dust and scratch correction by use of dark-field illumination
    10.
    发明授权
    Film scanner with dust and scratch correction by use of dark-field illumination 失效
    电影扫描仪通过使用暗场照明进行灰尘和划痕校正

    公开(公告)号：US5969372A

    公开(公告)日：1999-10-19

    申请号：US949507

    申请日：1997-10-14

    申请人： Donald J. Stavely ,  Daniel M. Bloom ,  Amy E. Battles ,  David K. Campbell ,  Oscar R. Herrera E.

    发明人： Donald J. Stavely ,  Daniel M. Bloom ,  Amy E. Battles ,  David K. Campbell ,  Oscar R. Herrera E.

    IPC分类号： G01B11/30 ,  G01N21/88 ,  G06T1/00

    CPC分类号： G01N21/8806

    摘要： A method and apparatus for detecting surface defects and artifacts on a transmissive image in an optical image scanner and correcting the resulting scanned image. In one scan, the image is scanned normally. Surface defects and artifacts such as dust, scratches and finger prints are detected by providing a separate scan using infrared light or by measuring light (white or infrared) that is scattered or diffracted by the defects and artifacts. Separate optical paths for illumination may be used, or separate optical paths for intensity measurement may be used. Image processing may then be used to correct areas in the normal scan corresponding to defects identified in the separate scan.

    摘要翻译： 一种用于检测光学图像扫描仪中的透射图像上的表面缺陷和伪影的方法和装置，并校正所得到的扫描图像。 在一次扫描中，图像正常扫描。 通过使用红外光提供单独的扫描或通过测量被缺陷和伪影散射或衍射的光（白色或红外线）来检测表面缺陷和伪影，例如灰尘，划痕和指纹。 可以使用用于照明的单独的光路，或者可以使用用于强度测量的单独的光路。 然后可以使用图像处理来校正对应于在单独扫描中识别的缺陷的正常扫描中的区域。