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    Correction of defective pixels in a detector
    7.
    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
    9.
    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。

    X-ray system and method for sampling image data
    10.
    发明授权
    X-ray system and method for sampling image data 有权
    X射线系统和图像数据采样方法

    公开(公告)号：US08576986B2

    公开(公告)日：2013-11-05

    申请号：US13011033

    申请日：2011-01-21

    申请人： James Zhengshe Liu ,  Paul Richard Granfors ,  Kenneth Scott Kump ,  Ping Xue ,  Donald Fayette Langler ,  Brian John Kost

    发明人： James Zhengshe Liu ,  Paul Richard Granfors ,  Kenneth Scott Kump ,  Ping Xue ,  Donald Fayette Langler ,  Brian John Kost

    IPC分类号： H05G1/64 ,  H05G1/46 ,  G01T1/20

    CPC分类号： G01T1/247 ,  A61B6/4494 ,  G01T1/24

    摘要： An X-ray imaging method includes in a digital X-ray detector including an array of discrete picture elements each including a photodiode and a transistor, applying a first voltage to the transistors of the discrete picture elements. The method also includes preparing for acquisition of X-ray image data by sampling data from the discrete picture elements while applying a second voltage to the transistors of the discrete picture elements not then being sampled, the second voltage being more negative than the first voltage. The method further includes receiving X-ray radiation on the detector from a source. The method yet further includes sampling X-ray image data from the discrete picture elements while applying the second voltage to the transistors of the discrete picture elements not then being sampled.

    摘要翻译： 一种X射线成像方法包括：数字X射线检测器，包括各自包括光电二极管和晶体管的离散像素阵列，向离散像素的晶体管施加第一电压。 该方法还包括准备通过从离散像素采样数据来获取X射线图像数据，同时向未被采样的离散像素的晶体管施加第二电压，第二电压比第一电压更负。 该方法还包括从源接收检测器上的X射线辐射。 该方法还包括从离散像素采样X射线图像数据，同时将第二电压施加到未被采样的离散像素的晶体管。