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    Gain Calibration and Correction Technique for Digital Imaging Systems
    14.
    发明申请
    Gain Calibration and Correction Technique for Digital Imaging Systems 有权
    数字成像系统的增益校准和校正技术

    公开(公告)号：US20100183124A1

    公开(公告)日：2010-07-22

    申请号：US12356488

    申请日：2009-01-20

    申请人： James Zhengshe Liu ,  John Lamberty ,  Ping Xue ,  Donald Langler

    发明人： James Zhengshe Liu ,  John Lamberty ,  Ping Xue ,  Donald Langler

    IPC分类号： G01D18/00

    CPC分类号： H04N5/3651 ,  A61B6/585 ,  H04N5/32 ,  H04N5/3655

    摘要： A gain correction and calibration technique for digital imaging systems is provided. In one embodiment, a method may include acquiring a plurality of dark images via a digital detector of an X-ray system. Acquiring the plurality of dark images may include acquiring data from a plurality of data channels of the digital detector during an analog test mode of the digital detector in which calibration voltages are applied to the data channels. The method may also include calibrating a channel gain map of the detector based on the plurality of dark images. Additional systems, methods, and devices are also disclosed.

    摘要翻译： 提供了数字成像系统的增益校正和校准技术。 在一个实施例中，一种方法可以包括通过X射线系统的数字检测器获取多个暗图像。 获取多个暗图像可以包括在其中将校准电压施加到数据通道的数字检测器的模拟测试模式期间从数字检测器的多个数据通道获取数据。 该方法还可以包括基于多个暗图像来校准检测器的通道增益图。 还公开了附加的系统，方法和装置。

    Systems, methods and apparatus for reduction of field-effect transistor leakage in a digital X-ray detector
    15.
    发明授权
    Systems, methods and apparatus for reduction of field-effect transistor leakage in a digital X-ray detector 有权
    用于在数字X射线检测器中减小场效应晶体管泄漏的系统，方法和装置

    公开(公告)号：US07755059B2

    公开(公告)日：2010-07-13

    申请号：US12264461

    申请日：2008-11-04

    申请人： James Zhengshe Liu ,  Ping Xue ,  Ching-Yeu Wei ,  Donald Langler ,  Fengchao Zhang

    发明人： James Zhengshe Liu ,  Ping Xue ,  Ching-Yeu Wei ,  Donald Langler ,  Fengchao Zhang

    IPC分类号： G01T1/24

    CPC分类号： H04N5/32 ,  H04N5/359

    摘要： Systems, methods and apparatus are provided through which in some implementations field-effect-transistor (FET) leakage from a pixel array panel of a digital X-ray detector is reduced by acquiring an image and an offset image from the pixel array panel of the digital X-ray detector while a negative voltage of the pixel array panel is at a higher level than a negative voltage of a threshold state of the pixel array panel of the digital X-ray detector.

    摘要翻译： 提供了系统，方法和装置，通过该系统，方法和装置，在一些实现中，通过从像素阵列面板中获取图像和偏移图像来减少来自数字X射线检测器的像素阵列面板的场效应晶体管（FET）泄漏 数字X射线检测器，而像素阵列面板的负电压处于比数字X射线检测器的像素阵列面板的阈值状态的负电压更高的电平。

    Gain calibration and correction technique for digital imaging systems
    17.
    发明授权
    Gain calibration and correction technique for digital imaging systems 有权
    数字成像系统的增益校准和校正技术

    公开(公告)号：US07963697B2

    公开(公告)日：2011-06-21

    申请号：US12356488

    申请日：2009-01-20

    申请人： James Zhengshe Liu ,  John Lamberty ,  Ping Xue ,  Donald Langler

    发明人： James Zhengshe Liu ,  John Lamberty ,  Ping Xue ,  Donald Langler

    IPC分类号： H05G1/26

    CPC分类号： H04N5/3651 ,  A61B6/585 ,  H04N5/32 ,  H04N5/3655

    摘要： A gain correction and calibration technique for digital imaging systems is provided. In one embodiment, a method may include acquiring a plurality of dark images via a digital detector of an X-ray system. Acquiring the plurality of dark images may include acquiring data from a plurality of data channels of the digital detector during an analog test mode of the digital detector in which calibration voltages are applied to the data channels. The method may also include calibrating a channel gain map of the detector based on the plurality of dark images. Additional systems, methods, and devices are also disclosed.

    摘要翻译： 提供了数字成像系统的增益校正和校准技术。 在一个实施例中，一种方法可以包括通过X射线系统的数字检测器获取多个暗图像。 获取多个暗图像可以包括在其中将校准电压施加到数据通道的数字检测器的模拟测试模式期间从数字检测器的多个数据通道获取数据。 该方法还可以包括基于多个暗图像来校准检测器的通道增益图。 还公开了附加的系统，方法和装置。

    Correction of defective pixels in a detector
    19.
    发明授权
    Correction of defective pixels in a detector 失效
    校正检测器中的缺陷像素

    公开(公告)号：US07068854B1

    公开(公告)日：2006-06-27

    申请号：US09474715

    申请日：1999-12-29

    申请人： Richard Aufrichtig ,  Ping Xue ,  Kenneth Scott Kump

    发明人： Richard Aufrichtig ,  Ping Xue ,  Kenneth Scott Kump

    IPC分类号： G06K9/40

    CPC分类号： G06T3/4015 ,  G06T5/20

    摘要： A detector imaging system having an apparatus and method for correcting defective pixels in an acquired image is disclosed herein. The system includes a correction scheme including temporarily replacing a defective pixel with a linear interpolation of the defective pixel's surrounding neighboring pixel values, determining a local gradient based in part on the acquired image and a gradient kernel, and providing a correction value based on the local gradient to correct the defective pixel. The correction scheme is repeated a plurality of times as desired to correct all the defective pixels in the acquired image.

    摘要翻译： 本文公开了一种具有用于校正所获取的图像中的有缺陷像素的装置和方法的检测器成像系统。 该系统包括校正方案，其包括用缺陷像素围绕相邻像素值的线性插值临时替换缺陷像素，部分地基于所获取的图像和梯度核确定局部梯度，并且基于本地 渐变以校正缺陷像素。 校正方案根据需要多次重复以校正所获取的图像中的所有缺陷像素。

    Correction of defective pixels in a detector using temporal gradients
    20.
    发明授权
    Correction of defective pixels in a detector using temporal gradients 失效
    使用时间梯度校正检测器中的缺陷像素

    公开(公告)号：US06792159B1

    公开(公告)日：2004-09-14

    申请号：US09474498

    申请日：1999-12-29

    申请人： Richard Aufrichtig ,  Kenneth Scott Kump ,  Ping Xue

    发明人： Richard Aufrichtig ,  Kenneth Scott Kump ,  Ping Xue

    IPC分类号： G06K940

    CPC分类号： H04N5/367 ,  H04N5/32

    摘要： A detector imaging system having an apparatus and method for correcting defective pixels in a current acquired image is disclosed herein. The system performs the correction of defective pixels using image feature information and temporal information. The system includes a correction scheme which includes determining a temporal matrix based on the current acquired image, at least one prior acquired image, and a filter weight; determining a local gradient based in part on the temporal matrix and a gradient kernel; and providing a correction value based on the local gradient to correct the defective pixel. The correction scheme is repeated a plurality of times as desired to correct all the defective pixels in the current acquired image.

    摘要翻译： 本文公开了一种具有用于校正当前获取的图像中的有缺陷像素的装置和方法的检测器成像系统。 该系统使用图像特征信息和时间信息来执行缺陷像素的校正。 该系统包括校正方案，其包括基于当前获取的图像确定时间矩阵，至少一个先前获取的图像和滤波器权重; 部分地基于时间矩阵和梯度核确定局部梯度; 以及基于所述局部梯度提供校正值以校正所述缺陷像素。 校正方案根据需要多次重复以校正当前获取的图像中的所有缺陷像素。