| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-dimensional digital filter extracting directional characteristics by an efficient and simple configuration of a combination of one-dimensional digital filters. SOLUTION: The two-dimensional digital filter includes: a first computation means, having a first one-dimensional filtering means performing X-directional one-dimensional convolution computation on two-dimensional digital data and a second one-dimensional filtering means for performing Y-directional one-dimensional convolution computation on the computation result of the first one-dimensional filtering means; a second computation means having a third one-dimensional filtering means performing X-directional one dimensional convolution computation on the two-dimensional digital data and a fourth one-dimensional filtering means performing Y-directional one-dimensional convolution computation on an computation result of the third one-dimensional filtering means; and an adding/subtracting means for obtaining a sum of the computation result of the first computation means, and the computation result of the second computation means or a difference between them. COPYRIGHT: (C)2010,JPO&INPIT |
