1. A computer-implemented method for processing image data, comprising: accessing image intensity data obtained by a digital imaging detector, wherein the image intensity data comprises a first region that is produced by primary X-rays and scatter and at least one second region that is produced by scatter only; identifying within the image intensity data the first region that is produced by primary X-rays and scatter and the at least one second region that is produced by scatter only; establishing scatter intensity in the at least one second region of the image intensity data that is produced by scatter only; estimating scatter intensity in the first region of the image intensity data based on the scatter intensity in the at least one second region of the image intensity data; and correcting the first region of the image intensity data for scatter based on the estimated scatter intensity in the first region to establish scatter-corrected image intensity data.