Image-enhancing operation of diagnostic x-ray apparatus, takes low resolution images at various distances and combines image data to form super-resolution image

摘要

A sequence of low resolution x-ray images (12-14) is prepared with different source-image-distances (SID). During the process, image coordinate systems are aligned. One image is selected as a reference. Optimized affine two-dimensional transformations of the lower-resolution images are determined. These are expressed in determinant form, and include a scaling factor (s) and shift (x, y) within the image plane. This transformation enables combination of the reference image with the rest, whilst minimizing error.