公开(公告)号：US06208764B1

公开(公告)日：2001-03-27

申请号：US09137064

申请日：1998-08-20

申请人： Greg L. Archer ,  Larry W. Wilkinson

发明人： Greg L. Archer ,  Larry W. Wilkinson

IPC分类号： G06K940

CPC分类号： H03H17/0263 ,  G06T5/20

摘要： A rank filter suitable for use in real-time signal processing and image processing applications, for example, for improving an image. The rank filter can be implemented in software or hardware, employed in single- and multi-dimensions, and within any specified window. A link-list algorithm is combined with a memory array for storing and ordering the data.

摘要翻译： 适用于实时信号处理和图像处理应用的等级滤波器，例如用于改善图像。 等级过滤器可以在单个和多个维度中以及在任何指定的窗口内的软件或硬件中实现。 链接列表算法与用于存储和排序数据的存储器阵列组合。

公开(公告)号：US07672518B2

公开(公告)日：2010-03-02

申请号：US11092300

申请日：2005-03-29

申请人： Greg L. Archer ,  Eric J. Meisenzahl

发明人： Greg L. Archer ,  Eric J. Meisenzahl

IPC分类号： G06K9/46

CPC分类号： G06K9/40 ,  G06K9/522

摘要： A method for detecting and removing noise from an image, the method includes the steps of applying a frequency transform to the image for obtaining a magnitude image; comparing a threshold value to values of the magnitude image for obtaining thresholded values; setting one or more thresholded values to a predetermined value; and reconstructing the image from the magnitude image having the predetermined values for removing noise from the image.

摘要翻译： 一种用于从图像中检测和去除噪声的方法，所述方法包括以下步骤：将频率变换应用于图像以获得幅度图像; 将阈值与用于获得阈值的值的幅度图像的值进行比较; 将一个或多个阈值设置为预定值; 以及从具有用于从图像中去除噪声的预定值的幅度图像重建图像。

公开(公告)号：US06389441B1

公开(公告)日：2002-05-14

申请号：US09322550

申请日：1999-05-28

申请人： Greg L. Archer ,  Larry W. Wilkinson

发明人： Greg L. Archer ,  Larry W. Wilkinson

IPC分类号： G06F738

CPC分类号： G06T5/20

摘要： A two dimensional moving averaging filter is provided using a computational element coupled to a memory means which contains an electronic version of a two dimensional array of pixel values with N rows and M columns and a temporary memory buffer having a dimension of M columns by R+1 rows that is operatively coupled to receive data from the array. Each of the M columns within the temporary memory buffer is summed and the summated column values are placed into the “R+1” row of the temporary memory wherein a neighborhood filter is formed by secondly summing a predetermined number, “C”, of the summated column values such that the neighborhood filter contains a summation for a neighborhood the pixel array values of “R” rows by “C” columns. The summated neighborhood is averaged by dividing by the number of elements within the neighborhood (R×C) to gain an averaged center to the neighborhood filter and this averaged center is placed into its representative position of the pixel value that is currently being filtered within the two dimensional array. The neighborhood filter is then moved to the next pixel position to be filtered by adding a new summated column value from the “R+” row of the temporary memory buffer to the neighborhood filter and subtracting an oldest summated column value within the R+1 row from the neighborhood filter. After processing an entire row, the oldest row is subtracted from the extra row summation and the next sequential row is added to the extra row.

摘要翻译： 使用耦合到存储器装置的计算元件提供二维移动平均滤波器，该存储器装置包含具有N行和M列的像素值的二维阵列的电子版本，以及具有M列尺寸的临时存储器缓冲器R + 1行，其可操作地耦合以从阵列接收数据。 临时存储器缓冲器中的每个M列相加，并将求和的列值放置在临时存储器的“R + 1”行中，其中通过对预定数量“C”二次相加形成邻域滤波器， 求和的列值，使得邻域滤波器包含邻域的“R”行“C”列的像素阵列值的求和。 求和的邻域通过除以邻域内的元素数目（RxC）进行平均，以获得对邻域滤波器的平均中心，并将该平均中心置于其在二维内当前正被滤波的像素值的代表位置 数组。 然后通过将临时存储器缓冲器的“R +”行中的新的求和列值添加到邻域滤波器，然后从R + 1行中减去最旧的求和列值，将邻域滤波器移动到下一个要滤波的像素位置 邻域过滤器。 在处理整行后，从额外的行求和中减去最旧的行，并将下一个顺序行添加到额外的行。

公开(公告)号：US07672519B2

公开(公告)日：2010-03-02

申请号：US11180816

申请日：2005-07-13

申请人： Greg L. Archer ,  Eric J. Meisenzahl ,  David N. Nichols ,  Shen Wang

发明人： Greg L. Archer ,  Eric J. Meisenzahl ,  David N. Nichols ,  Shen Wang

IPC分类号： G06K9/46

CPC分类号： G06K9/40 ,  G06K9/522

摘要： A method for detecting and removing noise from an image, the method includes the steps of applying a frequency transform to the image for obtaining a magnitude image; applying a threshold value to values of the magnitude image for obtaining threshold values; setting one or more threshold values to a predetermined value; and reconstructing the image from the magnitude image having the predetermined values for removing noise from the image.

摘要翻译： 一种用于从图像中检测和去除噪声的方法，所述方法包括以下步骤：将频率变换应用于图像以获得幅度图像; 将阈值应用于幅度图像的值以获得阈值; 将一个或多个阈值设置为预定值; 以及从具有用于从图像中去除噪声的预定值的幅度图像重建图像。

公开(公告)号：US07508994B2

公开(公告)日：2009-03-24

申请号：US11294298

申请日：2005-12-05

申请人： Shen Wang ,  Greg L. Archer

发明人： Shen Wang ,  Greg L. Archer

IPC分类号： G06K9/40 ,  H04N5/217

CPC分类号： H04N5/253 ,  G06T5/002 ,  G06T5/10 ,  G06T7/0004 ,  G06T2207/20056 ,  H04N5/3572 ,  H04N5/365

摘要： The present invention uses five regions of interest, 4 corners and 1 center to do Fourier Transform analysis to mark rough location of the streaks, if there is any. It sets the small window around the center in each Fourier Transform ROI to zero to mask the cluster of bright points caused by the lens rolloff or other noises. It use iterative linear regression to remove the random outliers and to search the best possible linear pattern. If it finds any streaks, it calculates the angle and converts it to the streak angle in spatial domain. Once a streak is detected, it can be removed by applying an inverse Fourier Transform on the processed magnitude and original phase Fourier Transform images.

摘要翻译： 本发明使用五个感兴趣的区域，四个角和一个中心进行傅里叶变换分析，以标记条纹的粗略位置，如果有的话。 它将每个傅里叶变换ROI中心的小窗口设置为零，以屏蔽由镜头滚降或其他噪声引起的亮点簇。 它使用迭代线性回归去除随机异常值并搜索最佳线性模式。 如果找到任何条纹，它会计算角度并将其转换为空间域中的条纹角度。 一旦检测到条纹，就可以通过在经处理的幅度和原始相位傅里叶变换图像上应用傅立叶逆变换来去除条纹。

公开(公告)号：US07315322B2

公开(公告)日：2008-01-01

申请号：US10900723

申请日：2004-07-28

申请人： Greg L. Archer ,  Eric J. Meisenzahl ,  Dennis J. Vankerkhove

发明人： Greg L. Archer ,  Eric J. Meisenzahl ,  Dennis J. Vankerkhove

IPC分类号： H04N17/00 ,  H04N17/02

CPC分类号： H04N5/3655 ,  H04N17/002

摘要： A method for testing an image sensor for photoresponse uniformity, the method includes the steps of providing a light source having inherent non-uniform light intensity characteristics; providing a light sensing device for measuring an intensity response of the light source on a predetermined image plane; determining an area on the image plane corresponding to an area for the image sensor; measuring pre-selected points of the determined area by the light sensing device for measuring incident light intensity from the light source on the image plane; interpolating non-measured points on the image plane representing an estimate of the non-uniformity of the light source at the non-measured points; inverting the interpolated image to represent the inverse of the light source non-uniformity; and applying the inverted image to the response of the image sensor which compensates for light source non-uniformity and enables the ability to quantify accurately the non-uniformity of the image sensor.

摘要翻译： 一种用于测试光响应均匀性的图像传感器的方法，所述方法包括提供具有固有的不均匀光强度特性的光源的步骤; 提供用于测量在预定图像平面上的光源的强度响应的光感测装置; 确定与图像传感器的区域相对应的图像平面上的区域; 通过光检测装置测量所确定的区域的预选点，以测量来自图像平面上的光源的入射光强度; 在图像平面上插入表示在非测量点处的光源的不均匀性的估计的非测量点; 反转内插图像以表示光源的不均匀性的倒数; 并将反转的图像应用于补偿光源不均匀性的图像传感器的响应，并且能够准确地量化图像传感器的不均匀性的能力。