Method and appts. for correcting digital X-ray image

一种图像校正系统和方法，包括数字数据输入部件(L，H)，其被配置为接收对应于检测器面板(116)上特定像素位置的像素电平的数字像素数据。偏置存储器(2665)为构成检测器面板的数个像素位置存储偏置像素值。减法器(2620，2640)从所接收的数字像素数据中减去与从偏置存储器得到的特定像素位置对应的偏置像素值，以提供减算结果。移位器(2625，2645)将减算结果下移预定数目的位，以提供移位结果。加法器(2630，2650)将移位结果附加至偏置像素值，以提供加算结果。以加算结果来更新所述偏置存储器的对应内存位置，其对应于特定像素位置。偏置存储器中的信息被用来校正数字图像。 An image correction system and method includes a digital data input unit configured to receive digital pixel data corresponding to a pixel level for a particular pixel location on a detector panel. An offset memory stores offset pixel values for each of a plurality of pixel locations making up the detector panel. A subtractor subtracts an offset pixel value corresponding to the particular pixel location, as obtained from the offset memory, from the received digital pixel data, to provide a subtracted result. A bit shifter unit shifts down the subtracted result by a predetermined number of bits to provide a bit-shifted result. An adder adds the bit-shifted result to the offset pixel value to provide an added result. A corresponding memory location of the offset memory that corresponds to the particular pixel location is updated with the added result. Information in the offset memory is utilized to correct a digital image.