公开(公告)号：EP1484717A2

公开(公告)日：2004-12-08

申请号：EP04253176.4

申请日：2004-05-28

申请人： GENERAL ELECTRIC COMPANY

发明人： Bueno, Clifford ,  Dixon, Walter ,  Hopple, Michael ,  Dixon, Elizabeth ,  Hopkins, Forrest ,  Lasiuk, Brian ,  McFarland, Ronald ,  Mitchell, Robert Jr. ,  Mohr, Gregory ,  Matula, August ,  Moermond, Kevin

IPC分类号： G06T5/00

CPC分类号： G06T5/009 ,  A61B6/583 ,  G01N2223/42 ,  G06T1/20 ,  G06T2200/24 ,  G06T2207/10116

摘要： A method (500), system and apparatus for processing a radiographic image of a scanned object is disclosed. A pixel offset correction is performed (510) in integer format on the radiographic image using saturation arithmetic to produce an image in integer format with any negative corrected values clipped to a value of zero. The resulting pixels are converted (520) to floating point format and the converted pixels are multiplied (530) by a gain factor. Optionally the resulting pixels are recursively averaged with previous results. The resulting pixels are converted (550) to integer format and the converted pixel values are clamped to a maximum value using saturation arithmetic Non-functional pixel correction (560) is performed in integer format and the resulting pixel values are clamped to a maximum value using saturation arithmetic. An optional processing path replaces the recursive average by a linear average. The resulting pixel values are optionally filtered (580) to enhance features of interest. The resulting pixel value is mapped (570) in integer format to a palette index to establish an output pixel intensity having one of many intensity levels. The optional processing is controlled through the hardware interface of a real-time image controller as images are acquired.

摘要翻译： 公开了一种用于处理扫描对象的放射线图像的方法（500），系统和装置。 使用饱和度算术在放射线照相图像上以整数格式执行像素偏移校正（510），以产生整数格式的图像，任何负校正值被削减到零值。 所得到的像素被转换（520）为浮点格式，并将转换的像素乘以（530）增益因子。 可选地，所得到的像素与先前的结果递归地平均。 将所得到的像素（550）转换为整数格式，并且使用饱和算术将经转换的像素值钳位到最大值。以整数格式执行非功能像素校正（560），并将所得到的像素值使用 饱和算术。 可选的处理路径将递归平均值替换为线性平均值。 任选地过滤所得到的像素值（580）以增强感兴趣的特征。 将所得像素值以整数格式映射（570）到调色板索引，以建立具有许多强度级别之一的输出像素强度。 当获取图像时，通过实时图像控制器的硬件接口来控制可选处理。

公开(公告)号：EP1484717A3

公开(公告)日：2012-11-07

申请号：EP04253176.4

申请日：2004-05-28

申请人： GENERAL ELECTRIC COMPANY

发明人： Bueno, Clifford ,  Dixon, Walter ,  Hopple, Michael ,  Dixon, Elizabeth ,  Hopkins, Forrest ,  Lasiuk, Brian ,  McFarland, Ronald ,  Mitchell, Robert Jr. ,  Mohr, Gregory ,  Matula, August ,  Moermond, Kevin

IPC分类号： G06T5/00 ,  G06T1/20

CPC分类号： G06T5/009 ,  A61B6/583 ,  G01N2223/42 ,  G06T1/20 ,  G06T2200/24 ,  G06T2207/10116

摘要： A method (500), system and apparatus for processing a radiographic image of a scanned object is disclosed. A pixel offset correction is performed (510) in integer format on the radiographic image using saturation arithmetic to produce an image in integer format with any negative corrected values clipped to a value of zero. The resulting pixels are converted (520) to floating point format and the converted pixels are multiplied (530) by a gain factor. Optionally the resulting pixels are recursively averaged with previous results. The resulting pixels are converted (550) to integer format and the converted pixel values are clamped to a maximum value using saturation arithmetic Non-functional pixel correction (560) is performed in integer format and the resulting pixel values are clamped to a maximum value using saturation arithmetic. An optional processing path replaces the recursive average by a linear average. The resulting pixel values are optionally filtered (580) to enhance features of interest. The resulting pixel value is mapped (570) in integer format to a palette index to establish an output pixel intensity having one of many intensity levels. The optional processing is controlled through the hardware interface of a real-time image controller as images are acquired.