| 摘要 |
<p>The present invention relates to a method and an arrangement for processing an input digital image. The image is filtered (42) with an at least two-dimensional filter that corresponds to a differenced version, differenced along a number of directions, of an original filter. The filtered image is then integrated (64) along this number of directions, such that a filtered image results, which correspond to the input digital image when filtered by means of the original filter. Since the differenced filter may be considerably more sparse than the original filter the number of operations required may however be considerably smaller as compared to when the original filter is used.</p> |
